Chris Lattner ffbd02829c enhance x-(-A) -> x+A to preserve NUW/NSW. ...

Use the presence of NSW/NUW to fold "icmp (x+cst), x" to a constant in
cases where it would otherwise be undefined behavior.

Surprisingly (to me at least), this triggers hundreds of the times in
a few benchmarks: lencode, ldecode, and 466.h264ref seem to *really*
like this.

llvm-svn: 91812

2009-12-21 04:04:05 +00:00

clang

Fix for PR5840: fix the kind of name lookup used for classes in

2009-12-21 01:42:38 +00:00

compiler-rt

Use __USER_LABEL_PREFIX__ so that we don't add a _ prefix on ELF.

2009-11-09 14:27:04 +00:00

llvm

enhance x-(-A) -> x+A to preserve NUW/NSW.

2009-12-21 04:04:05 +00:00

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