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5 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
Craig Topper
9472b4fbf9 Teach DAG combine to handle vector logical operations with vectors of all 1s or all 0s. These cases can show up when vectors are split for legalizing. Fix some tests that were dependent on these cases not being combined. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169684 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-08 22:49:19 +00:00
Nadav Rotem
78647434ea Add test arch to make it pass on non x86 targets 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145498 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-30 17:34:28 +00:00
Nadav Rotem
f3993125b1 Add a tripple to the test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145489 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-30 11:20:56 +00:00
Nadav Rotem
18197d7425 X86: PerformOrCombine introduced a vselect node with a wrong order of operands. This bug was introduced when a dedicated blend sdnode was replaced with the vselect node (in 139479). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145488 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-30 10:13:37 +00:00