Chris Lattner 9506c930aa When factoring multiply expressions across adds, factor both ... positive and negative forms of constants together. This allows us to compile: int foo(int x, int y) { return (x-y) + (x-y) + (x-y); } into: _foo: ## @foo subl %esi, %edi leal (%rdi,%rdi,2), %eax ret instead of (where the 3 and -3 were not factored): _foo: imull $-3, 8(%esp), %ecx imull $3, 4(%esp), %eax addl %ecx, %eax ret this started out as: movl 12(%ebp), %ecx imull $3, 8(%ebp), %eax subl %ecx, %eax subl %ecx, %eax subl %ecx, %eax ret This comes from PR5359. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92381 91177308-0d34-0410-b5e6-96231b3b80d8		2010-01-01 01:13:15 +00:00
..
2002-05-15-AgressiveSubMove.ll
2002-05-15-MissedTree.ll
2002-05-15-SubReassociate2.ll
2002-05-15-SubReassociate.ll
2002-07-09-DominanceProblem.ll
2003-08-12-InfiniteLoop.ll
2005-08-24-Crash.ll
2005-09-01-ArrayOutOfBounds.ll
2006-04-27-ReassociateVector.ll
basictest.ll	When factoring multiply expressions across adds, factor both	2010-01-01 01:13:15 +00:00
dg.exp
inverses.ll
looptest.ll
mulfactor2.ll
mulfactor.ll
negation.ll
otherops.ll
shift-factor.ll
shifttest.ll
subtest2.ll
subtest.ll