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23 lines
853 B
LLVM
23 lines
853 B
LLVM
; Test that the StrChrOptimizer works correctly
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; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
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; RUN: not grep {call.*%strchr}
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@hello = constant [14 x i8] c"hello world\5Cn\00" ; <[14 x i8]*> [#uses=1]
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@null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
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declare i8* @strchr(i8*, i32)
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declare i32 @puts(i8*)
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define i32 @main() {
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%hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=2]
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%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
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%world = call i8* @strchr( i8* %hello_p, i32 119 ) ; <i8*> [#uses=1]
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%ignore = call i8* @strchr( i8* %null_p, i32 119 ) ; <i8*> [#uses=0]
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%len = call i32 @puts( i8* %world ) ; <i32> [#uses=1]
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%index = add i32 %len, 112 ; <i32> [#uses=2]
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%result = call i8* @strchr( i8* %hello_p, i32 %index ) ; <i8*> [#uses=0]
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ret i32 %index
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}
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