9 Commits

Author	SHA1	Message	Date
Chris Lattner	7c99f19d9f	Carve out a place in instcombine to put transformations which work knowing that their ... result is non-zero. Implement an example optimization (PR9814), which allows us to transform: A / ((1 << B) >>u 2) into: A >>u (B-2) which we compile into: _divu3: ## @divu3 leal -2(%rsi), %ecx shrl %cl, %edi movl %edi, %eax ret instead of: _divu3: ## @divu3 movb %sil, %cl movl $1, %esi shll %cl, %esi shrl $2, %esi movl %edi, %eax xorl %edx, %edx divl %esi, %eax ret llvm-svn: 131860	2011-05-22 18:18:41 +00:00
Benjamin Kramer	57b3df59b9	Use SimplifyDemandedBits on div instructions. ... This folds away silly stuff like (a&255)/1000 -> 0. llvm-svn: 130614	2011-04-30 18:16:00 +00:00
Benjamin Kramer	6a50bbd284	FileCheckize. ... llvm-svn: 130613	2011-04-30 18:15:53 +00:00
Dan Gohman	72a13d2476	Use opt -S instead of piping bitcode output through llvm-dis. ... llvm-svn: 81257	2009-09-08 22:34:10 +00:00
Dan Gohman	9737a63ed8	Change these tests to feed the assembly files to opt directly, instead ... of using llvm-as, now that opt supports this. llvm-svn: 81226	2009-09-08 16:50:01 +00:00
Chris Lattner	5c953b7d27	implement PR2328. ... llvm-svn: 51176	2008-05-16 02:59:42 +00:00
Tanya Lattner	baa370b37a	Upgrade tests to not use llvm-upgrade. ... llvm-svn: 48483	2008-03-18 03:45:45 +00:00
Reid Spencer	ede8c3b92c	For PR1319: ... Make use of the END. facility on all files > 1K so that we aren't wasting CPU cycles searching for RUN: lines that we'll never find. llvm-svn: 36059	2007-04-15 07:38:21 +00:00
Reid Spencer	83b3d82672	Regression is gone, don't try to find it on clean target. ... llvm-svn: 33296	2007-01-17 07:59:14 +00:00