diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86FloatingPoint.cpp | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/inline-asm-fpstack3.ll | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86FloatingPoint.cpp b/llvm/lib/Target/X86/X86FloatingPoint.cpp index ed4eb444e9c..abacdb2f9b6 100644 --- a/llvm/lib/Target/X86/X86FloatingPoint.cpp +++ b/llvm/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/llvm/test/CodeGen/X86/inline-asm-fpstack3.ll b/llvm/test/CodeGen/X86/inline-asm-fpstack3.ll new file mode 100644 index 00000000000..ac89a1d9ad5 --- /dev/null +++ b/llvm/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 +} |
