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| author | Chris Lattner <sabre@nondot.org> | 2009-12-16 09:32:05 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-12-16 09:32:05 +0000 |
| commit | 24604110efc862423f7b2724e93a8793eefd44b2 (patch) | |
| tree | c5c8b46cb837b2d6b8aac432dd9a52f06e0d40e5 /test/Transforms/SimplifyLibCalls | |
| parent | acf8723b8e531e64abd3be61b4f34e7700c6028d (diff) | |
| download | external_llvm-24604110efc862423f7b2724e93a8793eefd44b2.zip external_llvm-24604110efc862423f7b2724e93a8793eefd44b2.tar.gz external_llvm-24604110efc862423f7b2724e93a8793eefd44b2.tar.bz2 | |
reapply my strstr optimization. I have reproduced the x86-64 bootstrap
miscompile (i386.o miscompares) but it happens both with and without
this patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91532 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyLibCalls')
| -rw-r--r-- | test/Transforms/SimplifyLibCalls/StrStr.ll | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/StrStr.ll b/test/Transforms/SimplifyLibCalls/StrStr.ll index e69de29..2cac2d4 100644 --- a/test/Transforms/SimplifyLibCalls/StrStr.ll +++ b/test/Transforms/SimplifyLibCalls/StrStr.ll @@ -0,0 +1,48 @@ +; RUN: opt < %s -simplify-libcalls -S | FileCheck %s +; PR5783 + +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-n8:16:32" +target triple = "i386-apple-darwin9.0" + +@.str = private constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] +@.str1 = private constant [2 x i8] c"a\00" ; <[2 x i8]*> [#uses=1] +@.str2 = private constant [6 x i8] c"abcde\00" ; <[6 x i8]*> [#uses=1] +@.str3 = private constant [4 x i8] c"bcd\00" ; <[4 x i8]*> [#uses=1] + +define i8* @test1(i8* %P) nounwind readonly { +entry: + %call = tail call i8* @strstr(i8* %P, i8* getelementptr inbounds ([1 x i8]* @.str, i32 0, i32 0)) nounwind ; <i8*> [#uses=1] + ret i8* %call +; strstr(P, "") -> P +; CHECK: @test1 +; CHECK: ret i8* %P +} + +declare i8* @strstr(i8*, i8* nocapture) nounwind readonly + +define i8* @test2(i8* %P) nounwind readonly { +entry: + %call = tail call i8* @strstr(i8* %P, i8* getelementptr inbounds ([2 x i8]* @.str1, i32 0, i32 0)) nounwind ; <i8*> [#uses=1] + ret i8* %call +; strstr(P, "a") -> strchr(P, 'a') +; CHECK: @test2 +; CHECK: @strchr(i8* %P, i32 97) +} + +define i8* @test3(i8* nocapture %P) nounwind readonly { +entry: + %call = tail call i8* @strstr(i8* getelementptr inbounds ([6 x i8]* @.str2, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8]* @.str3, i32 0, i32 0)) nounwind ; <i8*> [#uses=1] + ret i8* %call +; strstr("abcde", "bcd") -> "abcde"+1 +; CHECK: @test3 +; CHECK: getelementptr inbounds ([6 x i8]* @.str2, i32 0, i64 1) +} + +define i8* @test4(i8* %P) nounwind readonly { +entry: + %call = tail call i8* @strstr(i8* %P, i8* %P) nounwind ; <i8*> [#uses=1] + ret i8* %call +; strstr(P, P) -> P +; CHECK: @test4 +; CHECK: ret i8* %P +} |