Dan Gohman 1275e28ded Fold x-0 to x in unsafe-fp-math mode. This comes up in the ... testcase from PR3376, and in fact is sufficient to completely avoid the problem in that testcase. There's an underlying problem though; TLI.isOperationLegal considers Custom to be Legal, which might be ok in some cases, but that's what DAGCombiner is using in many places to test if something is legal when LegalOperations is true. When DAGCombiner is running after legalize, this isn't sufficient. I'll address this in a separate commit. llvm-svn: 62860		2009-01-23 19:10:37 +00:00
clang	Allow subtraction of function pointer types in C, as a GNU extension. Fixes rdar://problem/6520707	2009-01-23 19:03:35 +00:00
llvm	Fold x-0 to x in unsafe-fp-math mode. This comes up in the	2009-01-23 19:10:37 +00:00