7 years agoDon't include DFAPacketizer in TargetInstrInfo, there's no reason.
Eric Christopher [Tue, 14 Oct 2014 01:13:53 +0000 (01:13 +0000)]
Don't include DFAPacketizer in TargetInstrInfo, there's no reason.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219653 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInclude map into the A15SDOptimizer rather than pick it up
Eric Christopher [Tue, 14 Oct 2014 01:13:51 +0000 (01:13 +0000)]
Include map into the A15SDOptimizer rather than pick it up
transitively from the DFAPacketizer via TargetInstrInfo.h.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219652 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRemove the TargetMachine from DFAPacketizer since it was only
Eric Christopher [Tue, 14 Oct 2014 01:03:16 +0000 (01:03 +0000)]
Remove the TargetMachine from DFAPacketizer since it was only
being used to grab subtarget specific things that we can grab
from the MachineFunction anyhow.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219650 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoIntroduce Go coding standards for LLVM.
Peter Collingbourne [Tue, 14 Oct 2014 00:40:53 +0000 (00:40 +0000)]
Introduce Go coding standards for LLVM.

Rather than define our own standards, we adopt a set of best practices that
are already in use by the Go community.

Differential Revision: http://reviews.llvm.org/D5761

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219646 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agofix formatting; NFC
Sanjay Patel [Tue, 14 Oct 2014 00:33:23 +0000 (00:33 +0000)]
fix formatting; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219645 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd some optional passes around the vectorizer to both better prepare
Chandler Carruth [Tue, 14 Oct 2014 00:31:29 +0000 (00:31 +0000)]
Add some optional passes around the vectorizer to both better prepare
the IR going into it and to clean up the IR produced by the vectorizers.

Note that these are *off by default* right now while folks collect data
on whether the performance tradeoff is reasonable.

In a build of the 'opt' binary, I see about 2% compile time regression
due to this change on average. This is in my mind essentially the worst
expected case: very little of the opt binary is going to *benefit* from
these extra passes.

I've seen several benchmarks improve in performance my small amounts due
to running these passes, and there are certain (rare) cases where these
passes make a huge difference by either enabling the vectorizer at all
or by hoisting runtime checks out of the outer loop. My primary
motivation is to prevent people from seeing runtime check overhead in
benchmarks where the existing passes and optimizers would be able to
eliminate that.

I've chosen the sequence of passes based on the kinds of things that
seem likely to be relevant for the code at each stage: rotaing loops for
the vectorizer, finding correlated values, loop invariants, and
unswitching opportunities from any runtime checks, and cleaning up
commonalities exposed by the SLP vectorizer.

I'll be pinging existing threads where some of these issues have come up
and will start new threads to get folks to benchmark and collect data on
whether this is the right tradeoff or we should do something else.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219644 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoIntroduce LLVMWriteBitcodeToMemoryBuffer C API function.
Peter Collingbourne [Tue, 14 Oct 2014 00:30:59 +0000 (00:30 +0000)]
Introduce LLVMWriteBitcodeToMemoryBuffer C API function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219643 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoUpdating documentation as per Chandler's feedback.
Chris Bieneman [Mon, 13 Oct 2014 23:03:45 +0000 (23:03 +0000)]
Updating documentation as per Chandler's feedback.

This goes with the earlier commit to remove the static destructor from ManagedStatic.cpp by controlling the allocation and de-allocation of the mutex.

Summary: This is part of the ongoing work to remove static constructors and destructors.

Reviewers: chandlerc, rnk

Reviewed By: rnk

Subscribers: rnk, llvm-commits

Differential Revision: http://reviews.llvm.org/D5473

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219640 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine: Fix miscompile in X % -Y -> X % Y transform
David Majnemer [Mon, 13 Oct 2014 22:37:51 +0000 (22:37 +0000)]
InstCombine: Fix miscompile in X % -Y -> X % Y transform

We assumed that negation operations of the form (0 - %Z) resulted in a
negative number.  This isn't true if %Z was originally negative.
Substituting the negative number into the remainder operation may result
in undefined behavior because the dividend might be INT_MIN.

This fixes PR21256.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219639 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRemoving the static destructor from ManagedStatic.cpp by controlling the allocation...
Chris Bieneman [Mon, 13 Oct 2014 22:37:25 +0000 (22:37 +0000)]
Removing the static destructor from ManagedStatic.cpp by controlling the allocation and de-allocation of the mutex.

This patch adds a new llvm_call_once function which is used by the ManagedStatic implementation to safely initialize a global to avoid static construction and destruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219638 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoMigrate another set of getSubtargetImpl away.
Eric Christopher [Mon, 13 Oct 2014 21:57:44 +0000 (21:57 +0000)]
Migrate another set of getSubtargetImpl away.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219636 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRemove unused debug info constants.
Peter Collingbourne [Mon, 13 Oct 2014 21:50:30 +0000 (21:50 +0000)]
Remove unused debug info constants.

These became unused in r219010.

Differential Revision: http://reviews.llvm.org/D5760

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219635 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine: Don't miscompile (x lshr C1) udiv C2
David Majnemer [Mon, 13 Oct 2014 21:48:30 +0000 (21:48 +0000)]
InstCombine: Don't miscompile (x lshr C1) udiv C2

We have a transform that changes:
  (x lshr C1) udiv C2
  x udiv (C2 << C1)

However, it is unsafe to do so if C2 << C1 discards any of C2's bits.

This fixes PR21255.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219634 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoMake first of several changes to bring up to AArch64 fast-isel style
Reed Kotler [Mon, 13 Oct 2014 21:46:41 +0000 (21:46 +0000)]
Make first of several changes to bring up to AArch64 fast-isel style

Make Mips fast-isel track the form of AArch64 where practical.
This makes it easier for people to review the code, to borrow similar code, and to see how to eventually move a lot of this
 target code for fast-isels into target independent code.

These are just cosmetic changes. Should be no functional difference.

Test Plan:
make check
test-suite for 4 flavors mips32 r1/r2 , -O0/-O2

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: aemerson, llvm-commits, rfuhler

Differential Revision: http://reviews.llvm.org/D5595

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219633 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoUpdate the example of using a command-line option custom parser to
Paul Robinson [Mon, 13 Oct 2014 21:11:22 +0000 (21:11 +0000)]
Update the example of using a command-line option custom parser to
match the current implementation.

Patch by Douglas Yung!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219631 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd an assertion about the integrity of the iterator.
Adrian Prantl [Mon, 13 Oct 2014 20:44:58 +0000 (20:44 +0000)]
Add an assertion about the integrity of the iterator.
Broken parent scope pointers in inlined DIVariables can cause
ensureAbstractVariableIsCreated to insert new abstract scopes, thus
invalidating the iterator in this loop and leading to hard-to-debug
crashes. Useful when manually reducing IR for testcases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219628 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoconstify the getters in SDNodeDbgValue.
Adrian Prantl [Mon, 13 Oct 2014 20:43:47 +0000 (20:43 +0000)]
constify the getters in SDNodeDbgValue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219627 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRefactor debug statement and remove dead argument. NFC.
Chad Rosier [Mon, 13 Oct 2014 19:46:39 +0000 (19:46 +0000)]
Refactor debug statement and remove dead argument. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219626 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd VS2012-generated test inputs for test/tools/llvm-readobj/codeview-linetables...
Timur Iskhodzhanov [Mon, 13 Oct 2014 17:03:13 +0000 (17:03 +0000)]
Add VS2012-generated test inputs for test/tools/llvm-readobj/codeview-linetables.test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219621 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoFix a broadcast related regression on the vector shuffle lowering.
Filipe Cabecinhas [Mon, 13 Oct 2014 16:16:16 +0000 (16:16 +0000)]
Fix a broadcast related regression on the vector shuffle lowering.

Summary: Test by Robert Lougher!

Reviewers: chandlerc

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5745

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219617 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoR600/SI: Minor cleanup of function
Matt Arsenault [Mon, 13 Oct 2014 15:47:59 +0000 (15:47 +0000)]
R600/SI: Minor cleanup of function

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219616 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[asan-asm-instrumentation] Follow-up fixes to r219602: asserts are moved into
Yuri Gorshenin [Mon, 13 Oct 2014 11:44:06 +0000 (11:44 +0000)]
[asan-asm-instrumentation] Follow-up fixes to r219602: asserts are moved into

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219610 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdds support for the Cortex-A17 to the ARM backend
Renato Golin [Mon, 13 Oct 2014 10:22:19 +0000 (10:22 +0000)]
Adds support for the Cortex-A17 to the ARM backend

Patch by Matthew Wahab.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219606 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[mips] Mark redundant instructions with a comment in test/CodeGen/Mips/Fast-ISel...
Daniel Sanders [Mon, 13 Oct 2014 10:18:02 +0000 (10:18 +0000)]
[mips] Mark redundant instructions with a comment in test/CodeGen/Mips/Fast-ISel/icmpa.ll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219605 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[AArch64] Add workaround for Cortex-A53 erratum (835769)
Bradley Smith [Mon, 13 Oct 2014 10:12:35 +0000 (10:12 +0000)]
[AArch64] Add workaround for Cortex-A53 erratum (835769)

Some early revisions of the Cortex-A53 have an erratum (835769) whereby it is
possible for a 64-bit multiply-accumulate instruction in AArch64 state to
generate an incorrect result.  The details are quite complex and hard to
determine statically, since branches in the code may exist in some
 circumstances, but all cases end with a memory (load, store, or prefetch)
instruction followed immediately by the multiply-accumulate operation.

The safest work-around for this issue is to make the compiler avoid emitting
multiply-accumulate instructions immediately after memory instructions and the
simplest way to do this is to insert a NOP.

This patch implements such work-around in the backend, enabled via the option

The work-around code generation is not enabled by default.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219603 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[asan-asm-instrumentation] Fixed memory references which includes %rsp as a base...
Yuri Gorshenin [Mon, 13 Oct 2014 09:37:47 +0000 (09:37 +0000)]
[asan-asm-instrumentation] Fixed memory references which includes %rsp as a base or an index register.

Summary: [asan-asm-instrumentation] Fixed memory references which includes %rsp as a base or an index register.

Reviewers: eugenis

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5599

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219602 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoUnix/Signals.inc: Let findModulesAndOffsets() built conditionally regarding to (defin...
NAKAMURA Takumi [Mon, 13 Oct 2014 04:32:43 +0000 (04:32 +0000)]
Unix/Signals.inc: Let findModulesAndOffsets() built conditionally regarding to (defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)). [-Wunused-function]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219596 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRevert r219584, "[X86] Memory folding for commutative instructions."
NAKAMURA Takumi [Mon, 13 Oct 2014 04:17:34 +0000 (04:17 +0000)]
Revert r219584, "[X86] Memory folding for commutative instructions."

It broke i686 selfhosting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219595 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[modules] Stop excluding Support/Debug.h from the Support module. This header
Richard Smith [Mon, 13 Oct 2014 00:41:03 +0000 (00:41 +0000)]
[modules] Stop excluding Support/Debug.h from the Support module. This header
has been modular since r206822, and excluding it was leading to workarounds
such as the one in r219592, which this change removes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219593 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[Modules] Add some missing includes to make files compile stand-alone.
Benjamin Kramer [Sun, 12 Oct 2014 22:49:26 +0000 (22:49 +0000)]
[Modules] Add some missing includes to make files compile stand-alone.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219592 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoModernize old-style static asserts. NFC.
Benjamin Kramer [Sun, 12 Oct 2014 17:56:40 +0000 (17:56 +0000)]
Modernize old-style static asserts. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219588 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRevert r219223, it creates invalid PHI nodes.
Joerg Sonnenberger [Sun, 12 Oct 2014 17:16:04 +0000 (17:16 +0000)]
Revert r219223, it creates invalid PHI nodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219587 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAPSInt: Simplify code to reduce the number of copies. No functionality change.
Benjamin Kramer [Sun, 12 Oct 2014 15:36:31 +0000 (15:36 +0000)]
APSInt: Simplify code to reduce the number of copies. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219586 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine: Turn (x != 0 & x <u C) into the canonical range check form (x-1 <u C-1)
Benjamin Kramer [Sun, 12 Oct 2014 14:02:34 +0000 (14:02 +0000)]
InstCombine: Turn (x != 0 & x <u C) into the canonical range check form (x-1 <u C-1)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219585 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[X86] Memory folding for commutative instructions.
Simon Pilgrim [Sun, 12 Oct 2014 10:52:55 +0000 (10:52 +0000)]
[X86] Memory folding for commutative instructions.

This patch improves support for commutative instructions in the x86 memory folding implementation by attempting to fold a commuted version of the instruction if the original folding fails - if that folding fails as well the instruction is 're-commuted' back to its original order before returning.

This mainly helps the stack inliner better fold reloads of 3 (or more) operand instructions (VEX encoded SSE etc.) but by performing this in the lowest foldMemoryOperandImpl implementation it also replaces the X86InstrInfo::optimizeLoadInstr version and is now used by FastISel too.

Differential Revision: http://reviews.llvm.org/D5701

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219584 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine: Simplify commonIDivTransforms
David Majnemer [Sun, 12 Oct 2014 08:34:24 +0000 (08:34 +0000)]
InstCombine: Simplify commonIDivTransforms

A helper routine, MultiplyOverflows, was a less efficient
reimplementation of APInt's smul_ov and umul_ov.  While we are here,
clean up the code so it's more uniform.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219583 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agollvm/test/CodeGen: Some tests don't REQUIRE asserts any more. Remove them.
NAKAMURA Takumi [Sun, 12 Oct 2014 06:47:47 +0000 (06:47 +0000)]
llvm/test/CodeGen: Some tests don't REQUIRE asserts any more. Remove them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219581 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoSuppress llvm-ar's MRI tests for now on win32, since line_iterator is incompatible...
NAKAMURA Takumi [Sat, 11 Oct 2014 22:21:27 +0000 (22:21 +0000)]
Suppress llvm-ar's MRI tests for now on win32, since line_iterator is incompatible to CRLF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219579 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoTest commit access (email fix)
Simon Pilgrim [Sat, 11 Oct 2014 20:28:56 +0000 (20:28 +0000)]
Test commit access (email fix)

Indentation tidyup.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219577 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAssumptionTracker: Don't create temporary CallbackVHs.
Benjamin Kramer [Sat, 11 Oct 2014 19:13:01 +0000 (19:13 +0000)]
AssumptionTracker: Don't create temporary CallbackVHs.

Those are expensive to create in cold cache scenarios. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219575 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoMC: Shrink MCSymbolRefExpr by only storing the bits we need.
Benjamin Kramer [Sat, 11 Oct 2014 17:57:27 +0000 (17:57 +0000)]
MC: Shrink MCSymbolRefExpr by only storing the bits we need.

32 -> 16 bytes on x86_64. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219574 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoMC: Bit pack MCSymbolData.
Benjamin Kramer [Sat, 11 Oct 2014 15:07:21 +0000 (15:07 +0000)]
MC: Bit pack MCSymbolData.

On x86_64 this brings it from 80 bytes to 64 bytes. Also make any member
variables private and clean up uses to go through the existing accessors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219573 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoTest commit access
Simon Pilgrim [Sat, 11 Oct 2014 14:23:36 +0000 (14:23 +0000)]
Test commit access

Fix comment typo + spelling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219572 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine: Don't fold (X <<s log(INT_MIN)) /s INT_MIN to X
David Majnemer [Sat, 11 Oct 2014 10:20:04 +0000 (10:20 +0000)]
InstCombine: Don't fold (X <<s log(INT_MIN)) /s INT_MIN to X

Consider the case where X is 2.  (2 <<s 31)/s-2147483648 is zero but we
would fold to X.  Note that this is valid when we are in the unsigned
domain because we require NUW: 2 <<u 31 results in poison.

This fixes PR21245.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219568 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine, InstSimplify: (%X /s C1) /s C2 isn't always 0 when C1 * C2 overflow
David Majnemer [Sat, 11 Oct 2014 10:20:01 +0000 (10:20 +0000)]
InstCombine, InstSimplify: (%X /s C1) /s C2 isn't always 0 when C1 * C2 overflow

C2 = -1

C1 * C2 overflows without a doubt but consider the following:
%x = i32 INT_MIN

This means that (%X /s C1) is 1 and (%X /s C1) /s C2 is -1.

N. B.  Move the unsigned version of this transform to InstSimplify, it
doesn't create any new instructions.

This fixes PR21243.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219567 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoInstCombine: mul to shl shouldn't preserve nsw
David Majnemer [Sat, 11 Oct 2014 10:19:52 +0000 (10:19 +0000)]
InstCombine: mul to shl shouldn't preserve nsw

mul i32 nsw %x, -2147483648

this instruction will not result in poison if %x is 1

however, if we transform this into:
shl i32 nsw %x, 31

then we will be generating poison because we just shifted into the sign

This fixes PR21242.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219566 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[SCEV] Fix one more caller blindly passing the latch to SCEV's
Chandler Carruth [Sat, 11 Oct 2014 05:28:30 +0000 (05:28 +0000)]
[SCEV] Fix one more caller blindly passing the latch to SCEV's
getSmallConstantTripCount even when it isn't the exiting block.

I missed this in my first audit, very sorry. This was found in LNT and
elsewhere. I don't have a test case, but it was completely obvious from
inspection that this was the problem. I'll see if I can reduce a test
case, but I'm not really hopeful, and the value seems quite low.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219562 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoGuard the definition of the stack tracing function with the same macros
Chandler Carruth [Sat, 11 Oct 2014 01:04:40 +0000 (01:04 +0000)]
Guard the definition of the stack tracing function with the same macros
that guard its usage. Without this, we can get unused function warnings
when backtraces are disabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219558 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd basic conditional branches in mips fast-isel
Reed Kotler [Sat, 11 Oct 2014 00:55:18 +0000 (00:55 +0000)]
Add basic conditional branches in mips fast-isel

Summary: Implement the most basic form of conditional branches in Mips fast-isel.

Test Plan:
run 4 flavors of test-suite. mips32 r1/r2 and at -O0/O2

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits, rfuhler

Differential Revision: http://reviews.llvm.org/D5583

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219556 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[SCEV] Add some asserts to the recently improved trip count computation
Chandler Carruth [Sat, 11 Oct 2014 00:12:11 +0000 (00:12 +0000)]
[SCEV] Add some asserts to the recently improved trip count computation
routines and fix all of the bugs they expose.

I hit a test case that crashed even without these asserts due to passing
a non-exiting latch to the ExitingBlock parameter of the trip count
computation machinery. However, when I add the nice asserts, it turns
out we have plenty of coverage of these bugs, they just didn't manifest
in crashers.

The core problem seems to stem from an assumption that the latch *is*
the exiting block. While this is often true, and somewhat the "normal"
way to think about loops, it isn't necessarily true. The correct way to
call the trip count routines in a *generic* fashion (that is, without
a particular exit in mind) is to just use the loop's single exiting
block if it has one. The trip count can't be computed generically unless
it does. This works great for the loop vectorizer. The loop unroller
actually *wants* to select the latch when it has to chose between
multiple exits because for unrolling it is the latch trips that matter.
But if this is the desire, it needs to explicitly guard for non-exiting
latches and check for the generic trip count in that case.

I've added the asserts, and added convenience APIs for querying the trip
count generically that check for a single exit block. I've kept the APIs
consistent between computing trip count and trip multiples.

Thansk to Mark for the help debugging and tracking down the *right* fix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219550 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[MCJIT] Replace memcpy with readBytesUnaligned in RuntimeDyldMachOI386.
Lang Hames [Fri, 10 Oct 2014 23:07:09 +0000 (23:07 +0000)]
[MCJIT] Replace memcpy with readBytesUnaligned in RuntimeDyldMachOI386.

This should fix the failures of the MachO_i386_DynNoPIC_relocations.s test case
on MIPS hosts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219543 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoReturn undef on FP <-> Int conversions that overflow (PR21330).
Sanjay Patel [Fri, 10 Oct 2014 23:00:21 +0000 (23:00 +0000)]
Return undef on FP <-> Int conversions that overflow (PR21330).

The LLVM Lang Ref states for signed/unsigned int to float conversions:
"If the value cannot fit in the floating point value, the results are undefined."

And for FP to signed/unsigned int:
"If the value cannot fit in ty2, the results are undefined."

This matches the C definitions.

The existing behavior pins to infinity or a max int value, but that may just
lead to more confusion as seen in:

Returning undef will hopefully lead to a less silent failure.

Differential Revision: http://reviews.llvm.org/D5603

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219542 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoFollow-up to r219534 to make symbolization more robust.
Alexey Samsonov [Fri, 10 Oct 2014 22:58:26 +0000 (22:58 +0000)]
Follow-up to r219534 to make symbolization more robust.

1) Explicitly provide important arguments to llvm-symbolizer,
not relying on defaults.
2) Be more defensive about symbolizer output.

This might fix weird failures on ninja-x64-msvc-RA-centos6 buildbot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219541 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoR600/SI: Change how DS offsets are printed
Matt Arsenault [Fri, 10 Oct 2014 22:16:07 +0000 (22:16 +0000)]
R600/SI: Change how DS offsets are printed

Match SC by using offset/offset0/offset1 and printing
in decimal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219537 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoR600/SI: Match read2/write2 stride 64 versions
Matt Arsenault [Fri, 10 Oct 2014 22:12:32 +0000 (22:12 +0000)]
R600/SI: Match read2/write2 stride 64 versions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219536 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRe-land r219354: Use llvm-symbolizer to symbolize LLVM/Clang crash dumps.
Alexey Samsonov [Fri, 10 Oct 2014 22:06:59 +0000 (22:06 +0000)]
Re-land r219354: Use llvm-symbolizer to symbolize LLVM/Clang crash dumps.

In fact, symbolization is now expected to work only on Linux and
FreeBSD/NetBSD, where we have dl_iterate_phdr and can learn the
main executable name without argv0 (it will be possible on BSD systems
after http://reviews.llvm.org/D5693 lands). #ifdef-out the code for
all the rest Unix systems.

Reviewed in http://reviews.llvm.org/D5610

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219534 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoR600/SI: Add load / store machine optimizer pass.
Matt Arsenault [Fri, 10 Oct 2014 22:01:59 +0000 (22:01 +0000)]
R600/SI: Add load / store machine optimizer pass.

Currently this only functions to match simple cases
where ds_read2_* / ds_write2_* instructions can be used.

In the future it might match some of the other weird
load patterns, such as direct to LDS loads.

Currently enabled only with a subtarget feature to enable
easier testing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219533 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoThis patch teaches ScalarEvolution to pick and use !range metadata.
Sanjoy Das [Fri, 10 Oct 2014 21:22:34 +0000 (21:22 +0000)]
This patch teaches ScalarEvolution to pick and use !range metadata.
It also makes it more aggressive in querying range information by
adding a call to isKnownPredicateWithRanges to
isLoopBackedgeGuardedByCond and isLoopEntryGuardedByCond.

phabricator: http://reviews.llvm.org/D5638

Reviewed by: atrick, hfinkel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219532 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[mips] Actually mark that the default case is unreachable as this switch
Chandler Carruth [Fri, 10 Oct 2014 21:07:03 +0000 (21:07 +0000)]
[mips] Actually mark that the default case is unreachable as this switch
is over a subset of condition codes.

This fixes the -Werror build which warns about use of uninitialized
variables in the default case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219531 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoImplement floating point compare for mips fast-isel
Reed Kotler [Fri, 10 Oct 2014 20:46:28 +0000 (20:46 +0000)]
Implement floating point compare for mips fast-isel

Summary: Expand SelectCmp to handle floating point compare

Test Plan:
run 4 flavors of test-suite, mips32 r1/r2 O0/O2

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits, rfuhler

Differential Revision: http://reviews.llvm.org/D5567

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219530 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoRevert "DebugInfo: Ensure that all debug location scope chains from instructions...
David Blaikie [Fri, 10 Oct 2014 18:46:21 +0000 (18:46 +0000)]
Revert "DebugInfo: Ensure that all debug location scope chains from instructions within a function, lead to the function itself."

This invariant is violated (& the assertions fire) on some Objective C++
in the test-suite. Reverting while I investigate.

This reverts commit r219215.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219523 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agollvm-ar: Start adding support for mri scripts.
Rafael Espindola [Fri, 10 Oct 2014 18:33:51 +0000 (18:33 +0000)]
llvm-ar: Start adding support for mri scripts.

I was quiet surprised to find this feature being used. Fortunately the uses
I found look fairly simple. In fact, they are just a very verbose version
of the regular ar commands.

Start implementing it then by parsing the script and setting the command
variables as if we had a regular command line.

This patch adds just enough support to create an empty archive and do a bit
of error checking. In followup patches I will implement at least addmod
and addlib.

From the description in the manual, even the more general case should not
be too hard to implement if needed. The features that don't map 1:1 to
the simple command line are

* Reading from multiple archives.
* Creating multiple archives.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219521 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoR600/SI: Disable copying of SCC
Matt Arsenault [Fri, 10 Oct 2014 17:44:47 +0000 (17:44 +0000)]
R600/SI: Disable copying of SCC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219519 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoimplement integer compare in mips fast-isel
Reed Kotler [Fri, 10 Oct 2014 17:39:51 +0000 (17:39 +0000)]
implement integer compare in mips fast-isel

Summary: implement SelectCmp (integer compare ) in mips fast-isel

Test Plan:
also ran 4 test-suite flavors mips32 r1/r2 O0/O2

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits, rfuhler, mcrosier

Differential Revision: http://reviews.llvm.org/D5566

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219518 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoThis patch de-pessimizes the calculation of loop trip counts in
Mark Heffernan [Fri, 10 Oct 2014 17:39:11 +0000 (17:39 +0000)]
This patch de-pessimizes the calculation of loop trip counts in
ScalarEvolution in the presence of multiple exits. Previously all
loops exits had to have identical counts for a loop trip count to be
considered computable. This pessimization was implemented by calling
getBackedgeTakenCount(L) rather than getExitCount(L, ExitingBlock)
inside of ScalarEvolution::getSmallConstantTripCount() (see the FIXME
in the comments of that function). The pessimization was added to fix
a corner case involving undefined behavior (pr/16130). This patch more
precisely handles the undefined behavior case allowing the pessimization
to be removed.

ControlsExit replaces IsSubExpr to more precisely track the case where
undefined behavior is expected to occur. Because undefined behavior is
tracked more precisely we can remove MustExit from ExitLimit. MustExit
was used to track the case where the limit was computed potentially
assuming undefined behavior even if undefined behavior didn't necessarily

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219517 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd couple of missing 'override' keyword. NFC.
Fariborz Jahanian [Fri, 10 Oct 2014 17:34:30 +0000 (17:34 +0000)]
Add couple of missing 'override' keyword. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219516 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[PowerPC] Reduce names from Power8Vector to P8Vector
Bill Schmidt [Fri, 10 Oct 2014 17:21:15 +0000 (17:21 +0000)]
[PowerPC] Reduce names from Power8Vector to P8Vector

Per Hal Finkel's review, improving typability of some variable names.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219514 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[MiSched] Fix a logic error in tryPressure()
Hal Finkel [Fri, 10 Oct 2014 17:06:20 +0000 (17:06 +0000)]
[MiSched] Fix a logic error in tryPressure()

Fixes a logic error in the MachineScheduler found by Steve Montgomery (and
confirmed by Andy). This has gone unfixed for months because the fix has been
found to introduce some small performance regressions. However, Andy has
recommended that, at this point, we fix this to avoid further dependence on the
incorrect behavior (and then follow-up separately on any regressions), and I

Fixes PR18883.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219512 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoImplement floating point to integer conversion in mips fast-isel
Reed Kotler [Fri, 10 Oct 2014 17:00:46 +0000 (17:00 +0000)]
Implement floating point to integer conversion in mips fast-isel

Summary: Add the ability to convert 64 or 32 bit floating point values to integer in mips fast-isel

Test Plan:
ran 4 flavors of test-suite with no errors, misp32 r1/r2 O0/O2

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits, rfuhler, mcrosier

Differential Revision: http://reviews.llvm.org/D5562

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219511 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoSimplify a few uses of DwarfDebug::SPMap
David Blaikie [Fri, 10 Oct 2014 16:59:52 +0000 (16:59 +0000)]
Simplify a few uses of DwarfDebug::SPMap

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219510 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoReorder functions in WinCodeViewLineTables.cpp [NFC]
Timur Iskhodzhanov [Fri, 10 Oct 2014 16:05:32 +0000 (16:05 +0000)]
Reorder functions in WinCodeViewLineTables.cpp [NFC]

This helps read the comments and understand the code in a natural order

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219508 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[dwarfdump] Prettyprint DW_AT_APPLE_property_attribute bitfield values.
Frederic Riss [Fri, 10 Oct 2014 15:51:10 +0000 (15:51 +0000)]
[dwarfdump] Prettyprint DW_AT_APPLE_property_attribute bitfield values.

This change depends on the ApplePropertyString helper that I sent spearately.
Not sure how you want this tested: as a tool test by adding a binary to dump, or as an llvm test starting from an IR file?

Reviewers: dblaikie, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5689

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219507 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[dwarfdump] Resolve also variable specifications/abstract_origins.
Frederic Riss [Fri, 10 Oct 2014 15:51:02 +0000 (15:51 +0000)]
[dwarfdump] Resolve also variable specifications/abstract_origins.

DW_AT_specification and DW_AT_abstract_origin resolving was only performed
on subroutine DIEs because it used the getSubroutineName method. Introduce
a more generic getName() and use it to dump the reference attributes.

Testcases have been updated to check the printed names instead of the offsets
except when the name could be ambiguous.

Reviewers: dblaikie, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5625

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219506 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoReduce double set lookups. NFC.
Benjamin Kramer [Fri, 10 Oct 2014 15:32:50 +0000 (15:32 +0000)]
Reduce double set lookups. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219505 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[PowerPC] Add feature for Power8 vector extensions
Bill Schmidt [Fri, 10 Oct 2014 15:09:28 +0000 (15:09 +0000)]
[PowerPC] Add feature for Power8 vector extensions

The current VSX feature for PowerPC specifies availability of the VSX
instructions added with the 2.06 architecture version.  With 2.07, the
architecture adds new instructions to both the Category:Vector and
Category:VSX instruction sets.  Additionally, unaligned vector storage
operations have improved performance.

This patch adds a feature to provide access to the new instructions
and performance capabilities of Power8.  For compatibility with GCC,
the feature is controlled via a new -mpower8-vector switch, and the
feature causes the __POWER8_VECTOR__ builtin define to be generated by
the preprocessor.

There is a companion patch for cfe being committed at the same time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219501 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[mips][microMIPS] Implement ADDIUSP instruction
Zoran Jovanovic [Fri, 10 Oct 2014 14:37:30 +0000 (14:37 +0000)]
[mips][microMIPS] Implement ADDIUSP instruction
Differential Revision: http://reviews.llvm.org/D5084

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219500 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[mips][microMIPS] Implement JR16 instruction
Zoran Jovanovic [Fri, 10 Oct 2014 14:02:44 +0000 (14:02 +0000)]
[mips][microMIPS] Implement JR16 instruction
Differential Revision: http://reviews.llvm.org/D5062

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219498 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[mips][microMIPS] Implement ADDIUS5 instruction
Zoran Jovanovic [Fri, 10 Oct 2014 13:45:34 +0000 (13:45 +0000)]
[mips][microMIPS] Implement ADDIUS5 instruction
Differential Revision: http://reviews.llvm.org/D5049

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219495 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agops][microMIPS] Implement JRC instruction
Zoran Jovanovic [Fri, 10 Oct 2014 13:31:18 +0000 (13:31 +0000)]
ps][microMIPS] Implement JRC instruction
Differential Revision: http://reviews.llvm.org/D5045

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219494 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[mips][microMIPS] Implement JALRS16 instruction
Zoran Jovanovic [Fri, 10 Oct 2014 13:22:28 +0000 (13:22 +0000)]
[mips][microMIPS] Implement JALRS16 instruction
Differential Revision: http://reviews.llvm.org/D5027

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219493 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoFix a small typo, NFC
Timur Iskhodzhanov [Fri, 10 Oct 2014 12:52:58 +0000 (12:52 +0000)]
Fix a small typo, NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219492 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAPInt: Unfold return expressions so RVO can work.
Benjamin Kramer [Fri, 10 Oct 2014 10:18:12 +0000 (10:18 +0000)]
APInt: Unfold return expressions so RVO can work.

Saves a couple of expensive deep copies. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219487 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[ADT] Add an (ADL-friendly) abs free function for APFloat that returns
Chandler Carruth [Fri, 10 Oct 2014 08:27:22 +0000 (08:27 +0000)]
[ADT] Add an (ADL-friendly) abs free function for APFloat that returns
by value having cleared the sign bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219485 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoDon't use an unqualified 'abs' function call with a builtin type.
Chandler Carruth [Fri, 10 Oct 2014 08:27:19 +0000 (08:27 +0000)]
Don't use an unqualified 'abs' function call with a builtin type.

This is dangerous for numerous reasons. The primary risk here is with
floating point or double types where if the wrong header files are
included in a strange order this can implicitly convert to integers and
then call the C abs function on the integers. There is a secondary risk
that even impacts integers where if the namespace the code is written in
ever defines an abs overload for types within that namespace the global
abs will be hidden. The correct form is to call std::abs or write 'using
std::abs' for builtin types (and only the latter is correct in any
generic context).

I've also added the requisite header to be a bit more explicit here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219484 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd tests for r219479.
David Majnemer [Fri, 10 Oct 2014 06:59:05 +0000 (06:59 +0000)]
Add tests for r219479.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219480 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoObject, COFF: Relax aux symbols for section definitions
David Majnemer [Fri, 10 Oct 2014 06:58:11 +0000 (06:58 +0000)]
Object, COFF: Relax aux symbols for section definitions

We, I suppose na├»vely, believed the COFF specification with regard to
auxiliary symbol records which defined sections: they specified that the
symbol value should be zero.  However, dumpbin and MinGW's objdump do
not consider the symbol value as a restriction.  Relaxing this allows us
to properly dump MinGW linked executables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219479 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoSink the per-CU part of DwarfDebug::finishSubprogramDefinitions into DwarfCompileUnit.
David Blaikie [Fri, 10 Oct 2014 06:39:29 +0000 (06:39 +0000)]
Sink the per-CU part of DwarfDebug::finishSubprogramDefinitions into DwarfCompileUnit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219477 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoSink most of DwarfDebug::constructAbstractSubprogramScopeDIE down into DwarfCompileUnit.
David Blaikie [Fri, 10 Oct 2014 06:39:26 +0000 (06:39 +0000)]
Sink most of DwarfDebug::constructAbstractSubprogramScopeDIE down into DwarfCompileUnit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219476 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd minnum / maxnum to APFloat
Matt Arsenault [Fri, 10 Oct 2014 05:21:32 +0000 (05:21 +0000)]
Add minnum / maxnum to APFloat

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219475 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[ADT] Replace the logb implementation with the simpler and much closer
Chandler Carruth [Fri, 10 Oct 2014 05:14:12 +0000 (05:14 +0000)]
[ADT] Replace the logb implementation with the simpler and much closer
to what we actually want ilogb implementation. This makes everything
*much* easier to deal with and is actually what we want when using it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219474 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[ADT] Add the scalbn function for APFloat.
Chandler Carruth [Fri, 10 Oct 2014 04:54:30 +0000 (04:54 +0000)]
[ADT] Add the scalbn function for APFloat.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219473 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[ADT] Implement the 'logb' functionality for APFloat. This is necessary
Chandler Carruth [Fri, 10 Oct 2014 04:17:04 +0000 (04:17 +0000)]
[ADT] Implement the 'logb' functionality for APFloat. This is necessary
to implement complex division in the constant folder of Clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219471 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[LVI] Revert the remainder of "r218231 - Add two thresholds lvi-overdefined-BB-thresh...
Hal Finkel [Fri, 10 Oct 2014 03:56:24 +0000 (03:56 +0000)]
[LVI] Revert the remainder of "r218231 - Add two thresholds lvi-overdefined-BB-threshold and lvi-overdefined-threshold"

Some of r218231 was reverted with the code that used it in r218971, but not all
of it. This removes the rest (which is now dead).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219469 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAvoid unnecessary map lookup/insertion.
David Blaikie [Fri, 10 Oct 2014 03:09:38 +0000 (03:09 +0000)]
Avoid unnecessary map lookup/insertion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219466 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoAdd isInfinity to ConstantFP
Matt Arsenault [Fri, 10 Oct 2014 02:15:04 +0000 (02:15 +0000)]
Add isInfinity to ConstantFP

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219463 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoSimplifyCFG: Don't convert phis into selects if we could remove undef behavior
Arnold Schwaighofer [Fri, 10 Oct 2014 01:27:02 +0000 (01:27 +0000)]
SimplifyCFG: Don't convert phis into selects if we could remove undef behavior

We used to transform this:

  define void @test6(i1 %cond, i8* %ptr) {
    br i1 %cond, label %bb1, label %bb2

    br label %bb2

    %ptr.2 = phi i8* [ %ptr, %entry ], [ null, %bb1 ]
    store i8 2, i8* %ptr.2, align 8
    ret void

into this:

  define void @test6(i1 %cond, i8* %ptr) {
    %ptr.2 = select i1 %cond, i8* null, i8* %ptr
    store i8 2, i8* %ptr.2, align 8
    ret void

because the simplifycfg transformation into selects would happen to happen
before the simplifycfg transformation that removes unreachable control flow
(We have 'unreachable control flow' due to the store to null which is undefined

The existing transformation that removes unreachable control flow in simplifycfg

  /// If BB has an incoming value that will always trigger undefined behavior
  /// (eg. null pointer dereference), remove the branch leading here.
  static bool removeUndefIntroducingPredecessor(BasicBlock *BB)

Now we generate:

  define void @test6(i1 %cond, i8* %ptr) {
    store i8 2, i8* %ptr.2, align 8
    ret void

I did not see any impact on the test-suite + externals.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219462 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoFix gcc warning in gold-plugin.cpp.
Rafael Espindola [Fri, 10 Oct 2014 00:48:13 +0000 (00:48 +0000)]
Fix gcc warning in gold-plugin.cpp.

Patch by Markus Trippelsdorf!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219459 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoobj2yaml, COFF: Handle long section names
David Majnemer [Fri, 10 Oct 2014 00:17:57 +0000 (00:17 +0000)]
obj2yaml, COFF: Handle long section names

Long section names are represented as a slash followed by a numeric
ASCII string.  This number is an offset into a string table.

Print the appropriate entry in the string table instead of the less
enlightening /4.

N.B.  yaml2obj already does the right thing, this test exercises both
sides of the (de-)serialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219458 91177308-0d34-0410-b5e6-96231b3b80d8

7 years ago[ADT] Add basic operator overloads for arithmetic to APFloat to make
Chandler Carruth [Thu, 9 Oct 2014 23:26:15 +0000 (23:26 +0000)]
[ADT] Add basic operator overloads for arithmetic to APFloat to make
code using it more readable.

Also add a copySign static function that works more like the standard
function by accepting the value and sign-carying value as arguments.

No interesting logic here, but tests added to cover the basic API
additions and make sure they do something plausible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219453 91177308-0d34-0410-b5e6-96231b3b80d8

7 years agoImprove sqrt estimate algorithm (fast-math)
Sanjay Patel [Thu, 9 Oct 2014 21:26:35 +0000 (21:26 +0000)]
Improve sqrt estimate algorithm (fast-math)

This patch changes the fast-math implementation for calculating sqrt(x) from:
y = 1 / (1 / sqrt(x))
y = x * (1 / sqrt(x))

This has 2 benefits: less code / faster code and one less estimate instruction
that may lose precision.

The only target that will be affected (until http://reviews.llvm.org/D5658 is approved)
is PPC. The difference in codegen for PPC is 2 less flops for a single-precision sqrtf
or vector sqrtf and 4 less flops for a double-precision sqrt.
We also eliminate a constant load and extra register usage.

Differential Revision: http://reviews.llvm.org/D5682

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219445 91177308-0d34-0410-b5e6-96231b3b80d8