diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86FrameLowering.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86FrameLowering.cpp b/llvm/lib/Target/X86/X86FrameLowering.cpp index bff9ac3133c..e3aa227702b 100644 --- a/llvm/lib/Target/X86/X86FrameLowering.cpp +++ b/llvm/lib/Target/X86/X86FrameLowering.cpp @@ -774,10 +774,13 @@ void X86FrameLowering::emitStackProbeCall(MachineFunction &MF, .addReg(SP, RegState::Define | RegState::Implicit) .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit); - if (!STI.isTargetWin32()) { + if (STI.isTargetWin64() || !STI.isOSWindows()) { + // MSVC x32's _chkstk and cygwin/mingw's _alloca adjust %esp themselves. // MSVC x64's __chkstk and cygwin/mingw's ___chkstk_ms do not adjust %rsp - // themselves. It also does not clobber %rax so we can reuse it when + // themselves. They also does not clobber %rax so we can reuse it when // adjusting %rsp. + // All other platforms do not specify a particular ABI for the stack probe + // function, so we arbitrarily define it to not adjust %esp/%rsp itself. BuildMI(MBB, MBBI, DL, TII.get(getSUBrrOpcode(Is64Bit)), SP) .addReg(SP) .addReg(AX); |
