llvm-6502

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History

Sanjay Patel 6539887847 Use broadcasts to optimize overall size when loading constant splat vectors (x86-64 with AVX or AVX2).

We generate broadcast instructions on CPUs with AVX2 to load some constant splat vectors.
This patch should preserve all existing behavior with regular optimization levels, 
but also use splats whenever possible when optimizing for *size* on any CPU with AVX or AVX2.

The tradeoff is up to 5 extra instruction bytes for the broadcast instruction to save
at least 8 bytes (up to 31 bytes) of constant pool data.

Differential Revision: http://reviews.llvm.org/D5347



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218263 91177308-0d34-0410-b5e6-96231b3b80d8

2014-09-22 18:54:01 +00:00

Analysis

Add two thresholds lvi-overdefined-BB-threshold and lvi-overdefined-threshold

2014-09-22 02:23:05 +00:00

AsmParser

…

Bitcode

Eliminating static destructor for the BitCodeErrorCategory by converting to a ManagedStatic.

2014-09-19 20:29:02 +00:00

CodeGen

Refactor reciprocal square root estimate into target-independent function; NFC.

2014-09-21 15:19:15 +00:00