derek.holloway
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53 lines
2.0 KiB
LLVM
53 lines
2.0 KiB
LLVM
; RUN: opt < %s -passes=asan -S -o %t.ll
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; RUN: FileCheck %s < %t.ll
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; RUN: llc < %t.ll | FileCheck %s --check-prefix=ASM
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-S32"
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target triple = "i386-pc-windows-msvc"
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define void @MyCPUID(i32 %fxn, ptr %out) sanitize_address {
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%fxn.ptr = alloca i32
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%a.ptr = alloca i32
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%b.ptr = alloca i32
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%c.ptr = alloca i32
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%d.ptr = alloca i32
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store i32 %fxn, ptr %fxn.ptr
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call void asm sideeffect inteldialect "xchg ebx, esi\0A\09mov eax, dword ptr $4\0A\09cpuid\0A\09mov dword ptr $0, eax\0A\09mov dword ptr $1, ebx\0A\09mov dword ptr $2, ecx\0A\09mov dword ptr $3, edx\0A\09xchg ebx, esi", "=*m,=*m,=*m,=*m,*m,~{eax},~{ebx},~{ecx},~{edx},~{esi},~{dirflag},~{fpsr},~{flags}"(ptr elementtype(i32) %a.ptr, ptr elementtype(i32) %b.ptr, ptr elementtype(i32) %c.ptr, ptr elementtype(i32) %d.ptr, ptr elementtype(i32) %fxn.ptr)
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%a = load i32, ptr %a.ptr
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store i32 %a, ptr %out
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%b = load i32, ptr %b.ptr
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%b.out = getelementptr inbounds i32, ptr %out, i32 1
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store i32 %b, ptr %b.out
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%c = load i32, ptr %c.ptr
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%c.out = getelementptr inbounds i32, ptr %out, i32 2
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store i32 %c, ptr %c.out
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%d = load i32, ptr %d.ptr
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%d.out = getelementptr inbounds i32, ptr %out, i32 3
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store i32 %d, ptr %d.out
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ret void
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}
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; We used to introduce stack mallocs for UAR detection, but that makes LLVM run
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; out of registers on 32-bit platforms. Therefore, we don't do stack malloc on
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; such functions.
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; CHECK-LABEL: define void @MyCPUID(i32 %fxn, ptr %out)
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; CHECK: %MyAlloca = alloca [96 x i8], align 32
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; CHECK-NOT: call {{.*}} @__asan_stack_malloc
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; The code generator should recognize that all operands are just stack memory.
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; This is important with MS inline asm where operand lists are implicit and all
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; local variables can be referenced freely.
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; ASM-LABEL: MyCPUID:
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; ASM: cpuid
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; ASM-NEXT: movl %eax, {{[0-9]+}}(%esp)
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; ASM-NEXT: movl %ebx, {{[0-9]+}}(%esp)
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; ASM-NEXT: movl %ecx, {{[0-9]+}}(%esp)
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; ASM-NEXT: movl %edx, {{[0-9]+}}(%esp)
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