// virtual memory manager are allocated in correct sequence.
if (NumBytes >= 4096 && STI.isOSWindows() && !STI.isTargetMacho()) {
const char *StackProbeSymbol;
- bool isSPUpdateNeeded = false;
if (Is64Bit) {
- if (STI.isTargetCygMing())
- StackProbeSymbol = "___chkstk";
- else {
+ if (STI.isTargetCygMing()) {
+ StackProbeSymbol = "___chkstk_ms";
+ } else {
StackProbeSymbol = "__chkstk";
- isSPUpdateNeeded = true;
}
} else if (STI.isTargetCygMing())
StackProbeSymbol = "_alloca";
.addReg(X86::EFLAGS, RegState::Define | RegState::Implicit)
.setMIFlag(MachineInstr::FrameSetup);
- // MSVC x64's __chkstk does not adjust %rsp itself.
- // It also does not clobber %rax so we can reuse it when adjusting %rsp.
- if (isSPUpdateNeeded) {
+ if (Is64Bit) {
+ // MSVC x64's __chkstk and cygwin/mingw's ___chkstk_ms do not adjust %rsp
+ // themself. It also does not clobber %rax so we can reuse it when
+ // adjusting %rsp.
BuildMI(MBB, MBBI, DL, TII.get(X86::SUB64rr), StackPtr)
.addReg(StackPtr)
.addReg(X86::RAX)
.setMIFlag(MachineInstr::FrameSetup);
}
-
if (isEAXAlive) {
// Restore EAX
MachineInstr *MI = addRegOffset(BuildMI(MF, DL, TII.get(X86::MOV32rm),