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https://github.com/c64scene-ar/llvm-6502.git
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Meador Inge
7629de3326
This patch migrates the strspn optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167568 91177308-0d34-0410-b5e6-96231b3b80d8
26 lines
841 B
LLVM
26 lines
841 B
LLVM
; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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target datalayout = "-p:64:64:64"
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@abcba = constant [6 x i8] c"abcba\00"
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@abc = constant [4 x i8] c"abc\00"
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@null = constant [1 x i8] zeroinitializer
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declare i64 @strcspn(i8*, i8*)
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define i64 @testcspn(i8* %s1, i8* %s2) {
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%abcba_p = getelementptr [6 x i8]* @abcba, i32 0, i32 0
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%abc_p = getelementptr [4 x i8]* @abc, i32 0, i32 0
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%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0
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%test1 = call i64 @strcspn(i8* %s1, i8* %null_p)
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; CHECK: call i64 @strlen(i8* %s1)
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%test2 = call i64 @strcspn(i8* %null_p, i8* %s2)
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%test3 = call i64 @strcspn(i8* %abcba_p, i8* %abc_p)
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; CHECK-NOT: call i64 @strcspn
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%test4 = call i64 @strcspn(i8* %s1, i8* %s2)
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; CHECK: call i64 @strcspn(i8* %s1, i8* %s2)
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%add0 = add i64 %test1, %test3
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; CHECK: add i64 %{{.+}}, 0
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ret i64 %add0
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}
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