forked from OSchip/llvm-project
52 lines
1.3 KiB
LLVM
52 lines
1.3 KiB
LLVM
; RUN: llc < %s -frame-pointer=all -mtriple=arm64-windows | FileCheck %s
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; Test generated from C code:
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; #include <stdarg.h>
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; void *foo() {
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; return _AddressOfReturnAddress();
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; }
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; int bar(int x(va_list, void*), ...) {
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; va_list y;
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; va_start(y, x);
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; return x(y, _AddressOfReturnAddress()) + 1;
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; }
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declare void @llvm.va_start(i8*)
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declare i8* @llvm.addressofreturnaddress()
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define dso_local i8* @"foo"() {
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entry:
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%0 = call i8* @llvm.addressofreturnaddress()
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ret i8* %0
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; CHECK-LABEL: foo
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; CHECK: stp x29, x30, [sp, #-16]!
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; CHECK: mov x29, sp
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; CHECK: add x0, x29, #8
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; CHECK: ldp x29, x30, [sp], #16
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}
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define dso_local i32 @"bar"(i32 (i8*, i8*)* %x, ...) {
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entry:
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%x.addr = alloca i32 (i8*, i8*)*, align 8
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%y = alloca i8*, align 8
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store i32 (i8*, i8*)* %x, i32 (i8*, i8*)** %x.addr, align 8
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%y1 = bitcast i8** %y to i8*
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call void @llvm.va_start(i8* %y1)
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%0 = load i32 (i8*, i8*)*, i32 (i8*, i8*)** %x.addr, align 8
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%1 = call i8* @llvm.addressofreturnaddress()
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%2 = load i8*, i8** %y, align 8
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%call = call i32 %0(i8* %2, i8* %1)
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%add = add nsw i32 %call, 1
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ret i32 %add
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; CHECK-LABEL: bar
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; CHECK: sub sp, sp, #96
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; CHECK: stp x29, x30, [sp, #16]
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; CHECK: add x29, sp, #16
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; CHECK: str x1, [x29, #24]
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; CHECK: add x1, x29, #8
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; CHECK: ldp x29, x30, [sp, #16]
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; CHECK: add sp, sp, #96
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}
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