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28cefe8802
This patch migrates the strspn optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 167568
57 lines
1.4 KiB
LLVM
57 lines
1.4 KiB
LLVM
; Test that the strspn library call simplifier works correctly.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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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 @strspn(i8*, i8*)
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; Check strspn(s, "") -> 0.
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define i64 @test_simplify1(i8* %str) {
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; CHECK: @test_simplify1
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%pat = getelementptr [1 x i8]* @null, i32 0, i32 0
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%ret = call i64 @strspn(i8* %str, i8* %pat)
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ret i64 %ret
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; CHECK-NEXT: ret i64 0
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}
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; Check strspn("", s) -> 0.
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define i64 @test_simplify2(i8* %pat) {
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; CHECK: @test_simplify2
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%str = getelementptr [1 x i8]* @null, i32 0, i32 0
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%ret = call i64 @strspn(i8* %str, i8* %pat)
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ret i64 %ret
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; CHECK-NEXT: ret i64 0
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}
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; Check strspn(s1, s2), where s1 and s2 are constants.
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define i64 @test_simplify3() {
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; CHECK: @test_simplify3
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%str = getelementptr [6 x i8]* @abcba, i32 0, i32 0
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%pat = getelementptr [4 x i8]* @abc, i32 0, i32 0
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%ret = call i64 @strspn(i8* %str, i8* %pat)
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ret i64 %ret
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; CHECK-NEXT: ret i64 5
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}
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; Check cases that shouldn't be simplified.
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define i64 @test_no_simplify1(i8* %str, i8* %pat) {
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; CHECK: @test_no_simplify1
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%ret = call i64 @strspn(i8* %str, i8* %pat)
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; CHECK-NEXT: %ret = call i64 @strspn(i8* %str, i8* %pat)
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ret i64 %ret
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; CHECK-NEXT: ret i64 %ret
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}
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