diff options
Diffstat (limited to 'lib/Target/X86')
| -rw-r--r-- | lib/Target/X86/X86FloatingPoint.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/Target/X86/X86FloatingPoint.cpp b/lib/Target/X86/X86FloatingPoint.cpp index abacdb2..c282dc0 100644 --- a/lib/Target/X86/X86FloatingPoint.cpp +++ b/lib/Target/X86/X86FloatingPoint.cpp @@ -990,16 +990,18 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) { } case X86::FpSET_ST0_32: case X86::FpSET_ST0_64: - case X86::FpSET_ST0_80: + case X86::FpSET_ST0_80: { + unsigned RegOnTop = getStackEntry(0); // FpSET_ST0_80 is generated by copyRegToReg for both function return // and inline assembly with the "st" constrain. In the latter case, - // it is possible for FP0 to be alive after this instruction. - if (!MI->killsRegister(X86::FP0)) { + // it is possible for ST(0) to be alive after this instruction. + if (!MI->killsRegister(X86::FP0 + RegOnTop)) { // Duplicate ST0 duplicateToTop(0, 7 /*temp register*/, I); } --StackTop; // "Forget" we have something on the top of stack! break; + } case X86::FpSET_ST1_32: case X86::FpSET_ST1_64: case X86::FpSET_ST1_80: |