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| author | Meador Inge <meadori@codesourcery.com> | 2012-11-08 01:33:50 +0000 |
|---|---|---|
| committer | Meador Inge <meadori@codesourcery.com> | 2012-11-08 01:33:50 +0000 |
| commit | 7629de3326318e533ab969abd1b0cbc569b3f3b7 (patch) | |
| tree | 60efc65c279893e7d010617cb51f0b8771e72143 /test | |
| parent | eb3a8c5288110ddf183e3e8b8babc303f6b78020 (diff) | |
| download | llvm-7629de3326318e533ab969abd1b0cbc569b3f3b7.tar.gz llvm-7629de3326318e533ab969abd1b0cbc569b3f3b7.tar.bz2 llvm-7629de3326318e533ab969abd1b0cbc569b3f3b7.tar.xz | |
instcombine: Migrate strspn optimizations
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
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/strspn-1.ll | 56 | ||||
| -rw-r--r-- | test/Transforms/SimplifyLibCalls/StrSpn.ll | 16 |
2 files changed, 56 insertions, 16 deletions
diff --git a/test/Transforms/InstCombine/strspn-1.ll b/test/Transforms/InstCombine/strspn-1.ll new file mode 100644 index 0000000000..393f88735b --- /dev/null +++ b/test/Transforms/InstCombine/strspn-1.ll @@ -0,0 +1,56 @@ +; Test that the strspn library call simplifier works correctly. +; +; RUN: opt < %s -instcombine -S | FileCheck %s + +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" + +@abcba = constant [6 x i8] c"abcba\00" +@abc = constant [4 x i8] c"abc\00" +@null = constant [1 x i8] zeroinitializer + +declare i64 @strspn(i8*, i8*) + +; Check strspn(s, "") -> 0. + +define i64 @test_simplify1(i8* %str) { +; CHECK: @test_simplify1 + %pat = getelementptr [1 x i8]* @null, i32 0, i32 0 + + %ret = call i64 @strspn(i8* %str, i8* %pat) + ret i64 %ret +; CHECK-NEXT: ret i64 0 +} + +; Check strspn("", s) -> 0. + +define i64 @test_simplify2(i8* %pat) { +; CHECK: @test_simplify2 + %str = getelementptr [1 x i8]* @null, i32 0, i32 0 + + %ret = call i64 @strspn(i8* %str, i8* %pat) + ret i64 %ret +; CHECK-NEXT: ret i64 0 +} + +; Check strspn(s1, s2), where s1 and s2 are constants. + +define i64 @test_simplify3() { +; CHECK: @test_simplify3 + %str = getelementptr [6 x i8]* @abcba, i32 0, i32 0 + %pat = getelementptr [4 x i8]* @abc, i32 0, i32 0 + + %ret = call i64 @strspn(i8* %str, i8* %pat) + ret i64 %ret +; CHECK-NEXT: ret i64 5 +} + +; Check cases that shouldn't be simplified. + +define i64 @test_no_simplify1(i8* %str, i8* %pat) { +; CHECK: @test_no_simplify1 + + %ret = call i64 @strspn(i8* %str, i8* %pat) +; CHECK-NEXT: %ret = call i64 @strspn(i8* %str, i8* %pat) + ret i64 %ret +; CHECK-NEXT: ret i64 %ret +} diff --git a/test/Transforms/SimplifyLibCalls/StrSpn.ll b/test/Transforms/SimplifyLibCalls/StrSpn.ll index 800c190883..2660ee9800 100644 --- a/test/Transforms/SimplifyLibCalls/StrSpn.ll +++ b/test/Transforms/SimplifyLibCalls/StrSpn.ll @@ -6,22 +6,6 @@ target datalayout = "-p:64:64:64" @abc = constant [4 x i8] c"abc\00" @null = constant [1 x i8] zeroinitializer -declare i64 @strspn(i8*, i8*) - -define i64 @testspn(i8* %s1, i8* %s2) { - %abcba_p = getelementptr [6 x i8]* @abcba, i32 0, i32 0 - %abc_p = getelementptr [4 x i8]* @abc, i32 0, i32 0 - %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 - %test1 = call i64 @strspn(i8* %s1, i8* %null_p) - %test2 = call i64 @strspn(i8* %null_p, i8* %s2) - %test3 = call i64 @strspn(i8* %abcba_p, i8* %abc_p) -; CHECK-NOT: call i64 @strspn - %test4 = call i64 @strspn(i8* %s1, i8* %s2) -; CHECK: call i64 @strspn(i8* %s1, i8* %s2) - ret i64 %test3 -; CHECK: ret i64 5 -} - declare i64 @strcspn(i8*, i8*) define i64 @testcspn(i8* %s1, i8* %s2) { |