4 Commits

Author	SHA1	Message	Date
Stephen Lin	f799e3f944	Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. ... This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258	2013-07-13 20:38:47 +00:00
Chandler Carruth	b27041c50b	Fix a miscompile in the DAG combiner. Previously, we would incorrectly ... try to reduce the width of this load, and would end up transforming: (truncate (lshr (sextload i48 <ptr> as i64), 32) to i32) to (truncate (zextload i32 <ptr+4> as i64) to i32) We lost the sext attached to the load while building the narrower i32 load, and replaced it with a zext because lshr always zext's the results. Instead, bail out of this combine when there is a conflict between a sextload and a zext narrowing. The rest of the DAG combiner still optimize the code down to the proper single instruction: movswl 6(...),%eax Which is exactly what we wanted. Previously we read past the end *and* missed the sign extension: movl 6(...), %eax llvm-svn: 169802	2012-12-11 00:36:57 +00:00
Dan Gohman	40503396da	Eliminate more uses of llvm-as and llvm-dis. ... llvm-svn: 81290	2009-09-08 23:54:48 +00:00
Chris Lattner	33de0c6e92	this xform is implemented. ... llvm-svn: 45404	2007-12-29 08:19:39 +00:00