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https://github.com/c64scene-ar/llvm-6502.git
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3e054fe9ef
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
971 B
LLVM
27 lines
971 B
LLVM
; Test that the StrChrOptimizer works correctly
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; RUN: opt %s -simplify-libcalls -S | \
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; RUN: not grep {call.*@strchr}
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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 = "-p:64:64:64"
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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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