forked from OSchip/llvm-project
46 lines
1.3 KiB
LLVM
46 lines
1.3 KiB
LLVM
; Test that the strcpy library call simplifier works correctly.
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; rdar://6839935
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; RUN: opt < %s -instcombine -S | FileCheck %s
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;
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; This transformation requires the pointer size, as it assumes that size_t is
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; the size of a pointer.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
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@hello = constant [6 x i8] c"hello\00"
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@a = common global [32 x i8] zeroinitializer, align 1
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@b = common global [32 x i8] zeroinitializer, align 1
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declare i8* @strcpy(i8*, i8*)
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define void @test_simplify1() {
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; CHECK: @test_simplify1
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%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
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%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
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call i8* @strcpy(i8* %dst, i8* %src)
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; CHECK: @llvm.memcpy.p0i8.p0i8.i32
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ret void
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}
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define i8* @test_simplify2() {
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; CHECK: @test_simplify2
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%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
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%ret = call i8* @strcpy(i8* %dst, i8* %dst)
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; CHECK: ret i8* getelementptr inbounds ([32 x i8]* @a, i32 0, i32 0)
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ret i8* %ret
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}
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define i8* @test_no_simplify1() {
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; CHECK: @test_no_simplify1
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%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
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%src = getelementptr [32 x i8]* @b, i32 0, i32 0
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%ret = call i8* @strcpy(i8* %dst, i8* %src)
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; CHECK: call i8* @strcpy
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ret i8* %ret
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}
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