forked from OSchip/llvm-project
33 lines
969 B
LLVM
33 lines
969 B
LLVM
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; Test that the strcat libcall simplifier works correctly.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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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"
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@hello = constant [6 x i8] c"hello\00"
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@empty = constant [1 x i8] c"\00"
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@a = common global [32 x i8] zeroinitializer, align 1
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declare i8* @strcat(i8*, i8*)
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define void @test_simplify1() {
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; CHECK-LABEL: @test_simplify1(
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; CHECK-NOT: call i8* @strcat
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; CHECK: ret void
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%dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
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%src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
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call i8* @strcat(i8* %dst, i8* %src)
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ret void
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}
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define void @test_simplify2() {
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; CHECK-LABEL: @test_simplify2(
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; CHECK-NEXT: ret void
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%dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0
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%src = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0
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call i8* @strcat(i8* %dst, i8* %src)
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ret void
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}
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