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Diffstat (limited to 'test/Transforms/SimplifyLibCalls/StrCat.ll')
| -rw-r--r-- | test/Transforms/SimplifyLibCalls/StrCat.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/StrCat.ll b/test/Transforms/SimplifyLibCalls/StrCat.ll new file mode 100644 index 0000000..4e3d0ab --- /dev/null +++ b/test/Transforms/SimplifyLibCalls/StrCat.ll @@ -0,0 +1,33 @@ +; Test that the StrCatOptimizer works correctly +; PR3661 +; RUN: opt < %s -simplify-libcalls -S | \ +; RUN: not grep {call.*strcat} +; RUN: opt < %s -simplify-libcalls -S | \ +; RUN: grep {puts.*%arg1} + +; This transformation requires the pointer size, as it assumes that size_t is +; the size of a pointer. +target datalayout = "-p:64:64:64" + +@hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1] +@null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] +@null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1] + +declare i8* @strcat(i8*, i8*) + +declare i32 @puts(i8*) + +define i32 @main() { + %target = alloca [1024 x i8] ; <[1024 x i8]*> [#uses=1] + %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=2] + store i8 0, i8* %arg1 + %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1] + %rslt1 = call i8* @strcat( i8* %arg1, i8* %arg2 ) ; <i8*> [#uses=1] + %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1] + %rslt2 = call i8* @strcat( i8* %rslt1, i8* %arg3 ) ; <i8*> [#uses=1] + %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1] + %rslt3 = call i8* @strcat( i8* %rslt2, i8* %arg4 ) ; <i8*> [#uses=1] + call i32 @puts( i8* %rslt3 ) ; <i32>:1 [#uses=0] + ret i32 0 +} + |