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Commit Graph

3 Commits

Author SHA1 Message Date
Benjamin Kramer
aa2475fd87 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.

llvm-svn: 174325
2013-02-04 15:19:18 +00:00
Dan Gohman
142428ce64 Eliminate more uses of llvm-as and llvm-dis.
llvm-svn: 81293
2009-09-09 00:09:15 +00:00
Chris Lattner
5f3c587276 Fix an altivec constant miscompilation that Duncan found through
his work on legalizetypes.

llvm-svn: 53410
2008-07-10 16:33:38 +00:00