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https://github.com/RPCS3/llvm-mirror.git
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3add36fb90
Third time's the charm? The previous attempt (r265345) caused ASan test failures on X86, as broken CFI caused stack traces to not work. This version of the patch makes sure not to merge with stack adjustments that have CFI, and to not add merged instructions' offests to the CFI about to be generated. This is already covered by the lit tests; I just got the expectations wrong previously. llvm-svn: 265623
142 lines
4.2 KiB
LLVM
142 lines
4.2 KiB
LLVM
; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s --check-prefix=X64
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; RUN: llc -mtriple=i686-windows-msvc < %s | FileCheck %s --check-prefix=X86
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declare i8* @llvm.frameaddress(i32)
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declare void @llvm.localescape(...)
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declare i8* @llvm.localaddress()
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declare i8* @llvm.localrecover(i8*, i8*, i32)
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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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%a.i8 = call i8* @llvm.localrecover(i8* bitcast (void(i32)* @alloc_func to i8*), i8* %fp, i32 0)
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%a = bitcast i8* %a.i8 to i32*
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%a.val = load i32, i32* %a
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call i32 (i8*, ...) @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %a.val)
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%b.i8 = call i8* @llvm.localrecover(i8* bitcast (void(i32)* @alloc_func to i8*), i8* %fp, i32 1)
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%b = bitcast i8* %b.i8 to i32*
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%b.val = load i32, i32* %b
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call i32 (i8*, ...) @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %b.val)
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store i32 42, i32* %b
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%b2 = getelementptr i32, i32* %b, i32 1
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%b2.val = load i32, i32* %b2
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call i32 (i8*, ...) @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %b2.val)
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ret void
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}
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; X64-LABEL: print_framealloc_from_fp:
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; X64: movq %rcx, %[[parent_fp:[a-z]+]]
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; X64: movl .Lalloc_func$frame_escape_0(%[[parent_fp]]), %edx
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; X64: leaq {{.*}}(%rip), %[[str:[a-z]+]]
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; X64: movq %[[str]], %rcx
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; X64: callq printf
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; X64: movl .Lalloc_func$frame_escape_1(%[[parent_fp]]), %edx
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; X64: movq %[[str]], %rcx
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; X64: callq printf
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; X64: movl $42, .Lalloc_func$frame_escape_1(%[[parent_fp]])
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; X64: retq
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; X86-LABEL: print_framealloc_from_fp:
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; X86: pushl %esi
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; X86: movl 8(%esp), %esi
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; X86: pushl Lalloc_func$frame_escape_0(%esi)
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; X86: pushl $_str
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; X86: calll _printf
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; X86: addl $8, %esp
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; X86: pushl Lalloc_func$frame_escape_1(%esi)
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; X86: pushl $_str
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; X86: calll _printf
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; X86: addl $8, %esp
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; X86: movl $42, Lalloc_func$frame_escape_1(%esi)
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; X86: movl $4, %eax
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; X86: pushl Lalloc_func$frame_escape_1(%esi,%eax)
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; X86: pushl $_str
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; X86: calll _printf
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; X86: addl $8, %esp
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; X86: popl %esi
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; X86: retl
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define void @alloc_func(i32 %n) {
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%a = alloca i32
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%b = alloca i32, i32 2
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call void (...) @llvm.localescape(i32* %a, i32* %b)
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store i32 42, i32* %a
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store i32 13, i32* %b
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; Force usage of EBP with a dynamic alloca.
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alloca i8, i32 %n
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%lp = call i8* @llvm.localaddress()
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call void @print_framealloc_from_fp(i8* %lp)
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ret void
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}
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; X64-LABEL: alloc_func:
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; X64: pushq %rbp
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; X64: subq $16, %rsp
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; X64: .seh_stackalloc 16
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; X64: leaq 16(%rsp), %rbp
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; X64: .seh_setframe 5, 16
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; X64: .Lalloc_func$frame_escape_0 = -4
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; X64: .Lalloc_func$frame_escape_1 = -12
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; X64: movl $42, -4(%rbp)
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; X64: movl $13, -12(%rbp)
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; X64: movq %rbp, %rcx
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; X64: callq print_framealloc_from_fp
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; X64: retq
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; X86-LABEL: alloc_func:
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; X86: pushl %ebp
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; X86: movl %esp, %ebp
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; X86: subl $12, %esp
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; X86: Lalloc_func$frame_escape_0 = -4
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; X86: Lalloc_func$frame_escape_1 = -12
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; X86: movl $42, -4(%ebp)
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; X86: movl $13, -12(%ebp)
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; X86: pushl %ebp
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; X86: calll _print_framealloc_from_fp
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; X86: movl %ebp, %esp
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; X86: popl %ebp
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; X86: retl
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; Helper to make this a complete program so it can be compiled and tested.
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define i32 @main() {
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call void @alloc_func(i32 3)
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ret i32 0
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}
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define void @alloc_func_no_frameaddr() {
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%a = alloca i32
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%b = alloca i32
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call void (...) @llvm.localescape(i32* %a, i32* %b)
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store i32 42, i32* %a
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store i32 13, i32* %b
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call void @print_framealloc_from_fp(i8* null)
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ret void
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}
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; X64-LABEL: alloc_func_no_frameaddr:
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; X64: subq $40, %rsp
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; X64: .seh_stackalloc 40
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; X64: .seh_endprologue
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; X64: .Lalloc_func_no_frameaddr$frame_escape_0 = 36
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; X64: .Lalloc_func_no_frameaddr$frame_escape_1 = 32
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; X64: movl $42, 36(%rsp)
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; X64: movl $13, 32(%rsp)
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; X64: xorl %ecx, %ecx
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; X64: callq print_framealloc_from_fp
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; X64: addq $40, %rsp
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; X64: retq
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; X86-LABEL: alloc_func_no_frameaddr:
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; X86: subl $8, %esp
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; X86: Lalloc_func_no_frameaddr$frame_escape_0 = 4
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; X86: Lalloc_func_no_frameaddr$frame_escape_1 = 0
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; X86: movl $42, 4(%esp)
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; X86: movl $13, (%esp)
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; X86: pushl $0
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; X86: calll _print_framealloc_from_fp
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; X86: addl $12, %esp
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; X86: retl
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