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27 lines
903 B
LLVM
27 lines
903 B
LLVM
; Test that the StrChrOptimizer works correctly
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; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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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"
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@null = constant [1 x i8] zeroinitializer
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declare i8* @strchr(i8*, i32)
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define i32 @foo(i32 %index) {
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%hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0
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%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0
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%world = call i8* @strchr(i8* %hello_p, i32 119)
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; CHECK: getelementptr i8* %hello_p, i64 6
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%ignore = call i8* @strchr(i8* %null_p, i32 119)
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; CHECK-NOT: call i8* strchr
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%null = call i8* @strchr(i8* %hello_p, i32 0)
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; CHECK: getelementptr i8* %hello_p, i64 13
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%result = call i8* @strchr(i8* %hello_p, i32 %index)
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; CHECK: call i8* @memchr(i8* %hello_p, i32 %index, i64 14)
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ret i32 %index
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}
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