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2012-08-03Fix memcmp code-gen to honor -fno-builtin.Bob Wilson
I noticed that SelectionDAGBuilder::visitCall was missing a check for memcmp in TargetLibraryInfo, so that it would use custom code for memcmp calls even with -fno-builtin. I also had to add a new -disable-simplify-libcalls option to llc so that I could write a test for this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161262 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-22Relax expressions and add explicit triplets -linux and -win32.NAKAMURA Takumi
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126208 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07convert cmp to use a multipatternChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115978 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-24handle equality memcmp of 8 bytes on x86-64 with two unaligned loads and a Chris Lattner
compare. On other targets we end up with a call to memcmp because we don't want 16 individual byte loads. We should be able to use movups as well, but we're failing to select the generated icmp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92107 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-24move an optimization for memcmp out of simplifylibcalls and into Chris Lattner
SDISel. This optimization was causing simplifylibcalls to introduce type-unsafe nastiness. This is the first step, I'll be expanding the memcmp optimizations shortly, covering things that we really really wouldn't want simplifylibcalls to do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92098 91177308-0d34-0410-b5e6-96231b3b80d8