Commit Graph

6 Commits

Author SHA1 Message Date
Simon Pilgrim 5fa0fb23ca [X86][SSE] Missing SSE/AVX1 memory folding integer instructions
Added most of the missing integer vector folding patterns for SSE (to SSE42) and AVX1.

The most useful of these are probably the i32/i64 extraction, i8/i16/i32/i64 insertions, zero/sign extension, unsigned saturation subtractions, i64 subtractions and the variable mask blends (pblendvb) - others include CLMUL, SSE42 string comparisons and bit tests.

Differential Revision: http://reviews.llvm.org/D7094

llvm-svn: 226745
2015-01-21 23:43:30 +00:00
Benjamin Kramer 548ffa274a 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
Craig Topper a183ddb0fe 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.
llvm-svn: 169684
2012-12-08 22:49:19 +00:00
Nadav Rotem 0a1801015c Add test arch to make it pass on non x86 targets
llvm-svn: 145498
2011-11-30 17:34:28 +00:00
Nadav Rotem 66427bcce9 Add a tripple to the test
llvm-svn: 145489
2011-11-30 11:20:56 +00:00
Nadav Rotem 96923cc2bb 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).
llvm-svn: 145488
2011-11-30 10:13:37 +00:00