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This patch teaches the backend how to simplify/canonicalize dag node sequences normally introduced by the backend when promoting certain dag nodes with illegal vector type. This patch adds two new combine rules: 1) fold (shuffle (bitcast (BINOP A, B)), Undef, <Mask>) -> (shuffle (BINOP (bitcast A), (bitcast B)), Undef, <Mask>) 2) fold (BINOP (shuffle (A, Undef, <Mask>)), (shuffle (B, Undef, <Mask>))) -> (shuffle (BINOP A, B), Undef, <Mask>). Both rules are only triggered on the type-legalized DAG. In particular, rule 1. is a target specific combine rule that attempts to sink a bitconvert into the operands of a binary operation. Rule 2. is a target independet rule that attempts to move a shuffle immediately after a binary operation. llvm-svn: 209930 |
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AArch64 | ||
ARM | ||
CPP | ||
Generic | ||
Hexagon | ||
Inputs | ||
Mips | ||
MSP430 | ||
NVPTX | ||
PowerPC | ||
R600 | ||
SPARC | ||
SystemZ | ||
Thumb | ||
Thumb2 | ||
X86 | ||
XCore |