// If the function takes variable number of arguments, make a frame index for
// the start of the first vararg value... for expansion of llvm.va_start.
if (isVarArg) {
- if (!IsWin64 && (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
- CallConv != CallingConv::X86_ThisCall))) {
+ if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
+ CallConv != CallingConv::X86_ThisCall)) {
FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
}
if (Is64Bit) {
int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
FuncInfo->setRegSaveFrameIndex(
MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
- FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
+ // Fixup to set vararg frame on shadow area (4 x i64).
+ if (NumIntRegs < 4)
+ FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
} else {
// For X86-64, if there are vararg parameters that are passed via
// registers, then we must store them to their spots on the stack so they
}
declare void @llvm.va_start(i8*) nounwind
+
+; CHECK: f5:
+; CHECK: pushq
+; CHECK: leaq 56(%rsp),
+define i8* @f5(i64 %a0, i64 %a1, i64 %a2, i64 %a3, i64 %a4, ...) nounwind {
+entry:
+ %ap = alloca i8*, align 8
+ %ap1 = bitcast i8** %ap to i8*
+ call void @llvm.va_start(i8* %ap1)
+ ret i8* %ap1
+}
+
+; CHECK: f4:
+; CHECK: pushq
+; CHECK: leaq 48(%rsp),
+define i8* @f4(i64 %a0, i64 %a1, i64 %a2, i64 %a3, ...) nounwind {
+entry:
+ %ap = alloca i8*, align 8
+ %ap1 = bitcast i8** %ap to i8*
+ call void @llvm.va_start(i8* %ap1)
+ ret i8* %ap1
+}
+
+; CHECK: f3:
+; CHECK: pushq
+; CHECK: leaq 40(%rsp),
+define i8* @f3(i64 %a0, i64 %a1, i64 %a2, ...) nounwind {
+entry:
+ %ap = alloca i8*, align 8
+ %ap1 = bitcast i8** %ap to i8*
+ call void @llvm.va_start(i8* %ap1)
+ ret i8* %ap1
+}