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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2009-06-29 20:29:59 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2009-06-29 20:29:59 +0000 |
| commit | 63de5c3b7eda642ff76dffd6b109407565fdcd1b (patch) | |
| tree | 079b09515f995d383319e429a4bfd9edadfbc5de | |
| parent | cf048d4e59bc7641330675755fae18030cdddb0e (diff) | |
FIX PR 4459.
Not sure I understand how the temp register gets used,
but this fixes a bug and introduces no regressions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74446 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86FloatingPoint.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/inline-asm-fpstack3.ll | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/lib/Target/X86/X86FloatingPoint.cpp b/lib/Target/X86/X86FloatingPoint.cpp index ed4eb444e9..abacdb2f9b 100644 --- a/lib/Target/X86/X86FloatingPoint.cpp +++ b/lib/Target/X86/X86FloatingPoint.cpp @@ -996,7 +996,7 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) { // it is possible for FP0 to be alive after this instruction. if (!MI->killsRegister(X86::FP0)) { // Duplicate ST0 - duplicateToTop(0, 0, I); + duplicateToTop(0, 7 /*temp register*/, I); } --StackTop; // "Forget" we have something on the top of stack! break; diff --git a/test/CodeGen/X86/inline-asm-fpstack3.ll b/test/CodeGen/X86/inline-asm-fpstack3.ll new file mode 100644 index 0000000000..ac89a1d9ad --- /dev/null +++ b/test/CodeGen/X86/inline-asm-fpstack3.ll @@ -0,0 +1,15 @@ +; RUN: llvm-as < %s | llc -march=x86 > %t +; RUN: grep {fld %%st(0)} %t +; PR4459 + +declare x86_fp80 @ceil(x86_fp80) + +declare void @test(x86_fp80) + +define void @test2(x86_fp80 %a) { +entry: + %0 = call x86_fp80 @ceil(x86_fp80 %a) + call void asm sideeffect "fistpl $0", "{st}"( x86_fp80 %0) + call void @test(x86_fp80 %0 ) + ret void +} |