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(parent: dd44632) | patch
Two coalescer fixes in one.
authorEvan Cheng <evan.cheng@apple.com>
Wed, 11 Mar 2009 00:03:21 +0000 (00:03 +0000)
committerEvan Cheng <evan.cheng@apple.com>
Wed, 11 Mar 2009 00:03:21 +0000 (00:03 +0000)
commita2e6435e483f30e00382a5758f6dcc67e213b57a
treefdfebe0e7a7f9e2de6c971b2e5f62847ab01558btree | snapshot
parentdd446324982c1b54d6ecc756d2eff9ce37e6e5c1commit | diff
Two coalescer fixes in one.
1. Use the same value# to represent unknown values being merged into sub-registers.
2. When coalescer commute an instruction and the destination is a physical register, update its sub-registers by merging in the extended ranges.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66610 91177308-0d34-0410-b5e6-96231b3b80d8
include/llvm/CodeGen/LiveInterval.h diff | blob | history
lib/CodeGen/LiveInterval.cpp diff | blob | history
lib/CodeGen/SimpleRegisterCoalescing.cpp diff | blob | history
test/CodeGen/X86/2009-03-10-CoalescerBug.ll [new file with mode: 0644] blob
C/C++ LLVM-based compilers that forbids OOTA behaviors