Simon Pilgrim 34630b6ea9 [X86][SSE] Avoid vector byte shuffles with zero by using pshufb to create zeros ...

pshufb can shuffle in zero bytes as well as bytes from a source vector - we can use this to avoid having to shuffle 2 vectors and ORing the result when the used inputs from a vector are all zeroable.

Differential Revision: http://reviews.llvm.org/D6878



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225551 91177308-0d34-0410-b5e6-96231b3b80d8

2015-01-09 22:03:19 +00:00

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AArch64

Revert r225165 and r225169

2015-01-07 06:34:34 +00:00

ARM

Fix large stack alignment codegen for ARM and Thumb2 targets

2015-01-08 15:09:14 +00:00

CPP

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Generic

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Hexagon

[Hexagon] Adding dealloc_return encoding and absolute address stores.

2015-01-06 16:15:15 +00:00

Inputs

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Mips

[mips] Add support for accessing $gp as a named register.

2015-01-09 17:21:30 +00:00

MSP430

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NVPTX

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PowerPC

[PowerPC] Fold [sz]ext with fp_to_int lowering where possible

2015-01-09 01:34:30 +00:00

R600

R600/SI: Remove SIISelLowering::legalizeOperands()

2015-01-08 15:08:17 +00:00

SPARC

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SystemZ

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Thumb

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Thumb2

[ARM] Fix a bug in constant island pass that was triggering an assertion.

2015-01-08 20:44:50 +00:00

X86

[X86][SSE] Avoid vector byte shuffles with zero by using pshufb to create zeros

2015-01-09 22:03:19 +00:00

XCore

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