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9809999374
Simply loading or storing the frame pointer is not sufficient for Windows targets. Instead, create a synthetic frame object that we will lower later. References to this synthetic object will be replaced with the correct reference to the frame address. llvm-svn: 228748
44 lines
1.4 KiB
LLVM
44 lines
1.4 KiB
LLVM
; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s
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declare i8* @llvm.frameallocate(i32)
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declare i8* @llvm.frameaddress(i32)
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declare i8* @llvm.framerecover(i8*, i8*)
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declare i32 @printf(i8*, ...)
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@str = internal constant [10 x i8] c"asdf: %d\0A\00"
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define void @print_framealloc_from_fp(i8* %fp) {
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%alloc = call i8* @llvm.framerecover(i8* bitcast (void(i32*, i32*)* @alloc_func to i8*), i8* %fp)
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%alloc_i32 = bitcast i8* %alloc to i32*
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%r = load i32* %alloc_i32
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call i32 (i8*, ...)* @printf(i8* getelementptr ([10 x i8]* @str, i32 0, i32 0), i32 %r)
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ret void
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}
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; CHECK-LABEL: print_framealloc_from_fp:
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; CHECK: movabsq $.Lframeallocation_alloc_func, %[[offs:[a-z]+]]
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; CHECK: movl (%rcx,%[[offs]]), %edx
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; CHECK: leaq {{.*}}(%rip), %rcx
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; CHECK: callq printf
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; CHECK: retq
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define void @alloc_func(i32* %s, i32* %d) {
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%alloc = call i8* @llvm.frameallocate(i32 16)
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%alloc_i32 = bitcast i8* %alloc to i32*
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store i32 42, i32* %alloc_i32
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%fp = call i8* @llvm.frameaddress(i32 0)
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call void @print_framealloc_from_fp(i8* %fp)
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ret void
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}
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; CHECK-LABEL: alloc_func:
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; CHECK: subq $48, %rsp
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; CHECK: .seh_stackalloc 48
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; CHECK: leaq 48(%rsp), %rbp
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; CHECK: .seh_setframe 5, 48
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; CHECK: .Lframeallocation_alloc_func = -[[offs:[0-9]+]]
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; CHECK: movl $42, -[[offs]](%rbp)
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; CHECK: leaq -48(%rbp), %rcx
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; CHECK: callq print_framealloc_from_fp
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; CHECK: retq
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