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3 Commits

Author SHA1 Message Date
Benjamin Kramer
4969310052 SelectionDAG: Teach FoldConstantArithmetic how to deal with vectors. 
This required disabling a PowerPC optimization that did the following:
input:
x = BUILD_VECTOR <i32 16, i32 16, i32 16, i32 16>
lowered to:
tmp = BUILD_VECTOR <i32 8, i32 8, i32 8, i32 8>
x = ADD tmp, tmp

The add now gets folded immediately and we're back at the BUILD_VECTOR we
started from. I don't see a way to fix this currently so I left it disabled
for now.

Fix some trivially foldable X86 tests too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174325 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-02-04 15:19:18 +00:00
Dan Gohman
fce288fc91 Eliminate more uses of llvm-as and llvm-dis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81293 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-09 00:09:15 +00:00
Chris Lattner
85e7ac0353 Fix an altivec constant miscompilation that Duncan found through 
his work on legalizetypes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53410 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-10 16:33:38 +00:00