diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86FloatingPoint.cpp | 1 | ||||
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrCompiler.td | 7 |
2 files changed, 5 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86FloatingPoint.cpp b/llvm/lib/Target/X86/X86FloatingPoint.cpp index a4ea1a9eab0..48470da0164 100644 --- a/llvm/lib/Target/X86/X86FloatingPoint.cpp +++ b/llvm/lib/Target/X86/X86FloatingPoint.cpp @@ -1662,6 +1662,7 @@ void FPS::handleSpecialFP(MachineBasicBlock::iterator &I) { BuildMI(*MBB, I, MI->getDebugLoc(), TII->get(X86::CALLpcrel32)) .addExternalSymbol("_ftol2") .addReg(X86::ST0, RegState::ImplicitKill) + .addReg(X86::ECX, RegState::ImplicitDefine) .addReg(X86::EAX, RegState::Define | RegState::Implicit) .addReg(X86::EDX, RegState::Define | RegState::Implicit) .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit); diff --git a/llvm/lib/Target/X86/X86InstrCompiler.td b/llvm/lib/Target/X86/X86InstrCompiler.td index 8a7ee7d077f..89699462982 100644 --- a/llvm/lib/Target/X86/X86InstrCompiler.td +++ b/llvm/lib/Target/X86/X86InstrCompiler.td @@ -129,12 +129,13 @@ def SEG_ALLOCA_64 : I<0, Pseudo, (outs GR64:$dst), (ins GR64:$size), // The MSVC runtime contains an _ftol2 routine for converting floating-point // to integer values. It has a strange calling convention: the input is -// popped from the x87 stack, and the return value is given in EDX:EAX. No -// other registers (aside from flags) are touched. +// popped from the x87 stack, and the return value is given in EDX:EAX. ECX is +// used as a temporary register. No other registers (aside from flags) are +// touched. // Microsoft toolchains do not support 80-bit precision, so a WIN_FTOL_80 // variant is unnecessary. -let Defs = [EAX, EDX, EFLAGS], FPForm = SpecialFP in { +let Defs = [EAX, EDX, ECX, EFLAGS], FPForm = SpecialFP in { def WIN_FTOL_32 : I<0, Pseudo, (outs), (ins RFP32:$src), "# win32 fptoui", [(X86WinFTOL RFP32:$src)]>, |
