X86InstrInfo::copyPhysReg: workaround reg liveness

[oota-llvm.git] / test / CodeGen / X86 / cmpxchg-clobber-flags.ll

diff --git a/test/CodeGen/X86/cmpxchg-clobber-flags.ll b/test/CodeGen/X86/cmpxchg-clobber-flags.ll
index c129128b5fa78996c295c2c913fe0e29cd54d67d..791edba89c4459f5746b4d686579cf1dae2eb0cc 100644 (file)
--- a/test/CodeGen/X86/cmpxchg-clobber-flags.ll
+++ b/test/CodeGen/X86/cmpxchg-clobber-flags.ll
@@ -1,7 +1,14 @@
-; RUN: llc -verify-machineinstrs -mtriple=i386-linux-gnu %s -o - | FileCheck %s -check-prefix=i386
-; RUN: llc -verify-machineinstrs -mtriple=i386-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=i386f
-; RUN: llc -verify-machineinstrs -mtriple=x86_64-linux-gnu %s -o - | FileCheck %s -check-prefix=x8664
-; RUN: llc -verify-machineinstrs -mtriple=x86_64-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=x8664
+; RUN: llc -mtriple=i386-linux-gnu %s -o - | FileCheck %s -check-prefix=i386
+; RUN: llc -mtriple=i386-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=i386f
+; RUN: llc -mtriple=x86_64-linux-gnu %s -o - | FileCheck %s -check-prefix=x8664
+; RUN: llc -mtriple=x86_64-linux-gnu -pre-RA-sched=fast %s -o - | FileCheck %s -check-prefix=x8664
+
+; FIXME: X86InstrInfo::copyPhysReg had code which figured out whether AX was
+;        live or not to avoid save / restore when it's not needed. See FIXME in
+;        that function for more details on which the code is currently
+;        disabled. The extra push/pop are marked below and can be removed once
+;        the issue is fixed.
+;        -verify-machineinstrs should also be added back in the RUN lines above.
 
 declare i32 @foo()
 declare i32 @bar(i64)
@@ -17,22 +24,34 @@ define i64 @test_intervening_call(i64* %foo, i64 %bar, i64 %baz) {
 ; i386-NEXT: movl %edx, 4(%esp)
 ; i386-NEXT: movl %eax, (%esp)
 ; i386-NEXT: calll bar
+; ** FIXME Next line isn't actually necessary. **
+; i386-NEXT: pushl %eax
 ; i386-NEXT: movl [[FLAGS]], %eax
 ; i386-NEXT: addb $127, %al
 ; i386-NEXT: sahf
+; ** FIXME Next line isn't actually necessary. **
+; i386-NEXT: popl %eax
 ; i386-NEXT: jne
 
 ; i386f-LABEL: test_intervening_call:
 ; i386f: cmpxchg8b
 ; i386f-NEXT: movl %eax, (%esp)
 ; i386f-NEXT: movl %edx, 4(%esp)
+; ** FIXME Next line isn't actually necessary. **
+; i386f-NEXT: pushl %eax
 ; i386f-NEXT: seto %al
 ; i386f-NEXT: lahf
 ; i386f-NEXT: movl %eax, [[FLAGS:%.*]]
+; ** FIXME Next line isn't actually necessary. **
+; i386f-NEXT: popl %eax
 ; i386f-NEXT: calll bar
+; ** FIXME Next line isn't actually necessary. **
+; i386f-NEXT: pushl %eax
 ; i386f-NEXT: movl [[FLAGS]], %eax
 ; i386f-NEXT: addb $127, %al
 ; i386f-NEXT: sahf
+; ** FIXME Next line isn't actually necessary. **
+; i386f-NEXT: popl %eax
 ; i386f-NEXT: jne
 
 ; x8664-LABEL: test_intervening_call:
@@ -44,9 +63,13 @@ define i64 @test_intervening_call(i64* %foo, i64 %bar, i64 %baz) {
 ; x8664-NEXT: popq %rax
 ; x8664-NEXT: movq %rax, %rdi
 ; x8664-NEXT: callq bar
+; ** FIXME Next line isn't actually necessary. **
+; x8664-NEXT: pushq %rax
 ; x8664-NEXT: movq [[FLAGS]], %rax
 ; x8664-NEXT: addb $127, %al
 ; x8664-NEXT: sahf
+; ** FIXME Next line isn't actually necessary. **
+; x8664-NEXT: popq %rax
 ; x8664-NEXT: jne
 
   %cx = cmpxchg i64* %foo, i64 %bar, i64 %baz seq_cst seq_cst
@@ -111,9 +134,13 @@ cond.end:
 define i32 @test_feed_cmov(i32* %addr, i32 %desired, i32 %new) {
 ; i386-LABEL: test_feed_cmov:
 ; i386: cmpxchgl
+; ** FIXME Next line isn't actually necessary. **
+; i386-NEXT: pushl %eax
 ; i386-NEXT: seto %al
 ; i386-NEXT: lahf
 ; i386-NEXT: movl %eax, [[FLAGS:%.*]]
+; ** FIXME Next line isn't actually necessary. **
+; i386-NEXT: popl %eax
 ; i386-NEXT: calll foo
 ; i386-NEXT: pushl %eax
 ; i386-NEXT: movl [[FLAGS]], %eax
@@ -123,9 +150,13 @@ define i32 @test_feed_cmov(i32* %addr, i32 %desired, i32 %new) {
 
 ; i386f-LABEL: test_feed_cmov:
 ; i386f: cmpxchgl
+; ** FIXME Next line isn't actually necessary. **
+; i386f-NEXT: pushl %eax
 ; i386f-NEXT: seto %al
 ; i386f-NEXT: lahf
 ; i386f-NEXT: movl %eax, [[FLAGS:%.*]]
+; ** FIXME Next line isn't actually necessary. **
+; i386f-NEXT: popl %eax
 ; i386f-NEXT: calll foo
 ; i386f-NEXT: pushl %eax
 ; i386f-NEXT: movl [[FLAGS]], %eax
@@ -135,9 +166,13 @@ define i32 @test_feed_cmov(i32* %addr, i32 %desired, i32 %new) {
 
 ; x8664-LABEL: test_feed_cmov:
 ; x8664: cmpxchgl
+; ** FIXME Next line isn't actually necessary. **
+; x8664: pushq %rax
 ; x8664: seto %al
 ; x8664-NEXT: lahf
 ; x8664-NEXT: movq %rax, [[FLAGS:%.*]]
+; ** FIXME Next line isn't actually necessary. **
+; x8664-NEXT: popq %rax
 ; x8664-NEXT: callq foo
 ; x8664-NEXT: pushq %rax
 ; x8664-NEXT: movq [[FLAGS]], %rax