From 099b41f3427579717681fcbe62ac3848c071ec21 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 15 Dec 2009 09:05:13 +0000 Subject: [PATCH] add some other xforms that should be done as part of PR5783 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91428 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/SimplifyLibCalls.cpp | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp index 0d03e55eba7..6fd884bbd6d 100644 --- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -2644,10 +2644,11 @@ bool SimplifyLibCalls::doInitialization(Module &M) { // * strcspn("",a) -> 0 // * strcspn(s,"") -> strlen(a) // -// strstr: +// strstr: (PR5783) // * strstr(x,x) -> x -// * strstr(s1,s2) -> offset_of_s2_in(s1) -// (if s1 and s2 are constant strings) +// * strstr(x, "") -> x +// * strstr(x, "a") -> strchr(x, 'a') +// * strstr(s1,s2) -> result (if s1 and s2 are constant strings) // // tan, tanf, tanl: // * tan(atan(x)) -> x