llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-03-05 12:31:46 +00:00

History

Andrea Di Biagio 607099b697 [DAG] Teach how to turn a build_vector into a shuffle if some of the operands are zero.

Before this patch, the DAGCombiner only tried to convert build_vector dag nodes
into shuffles if all operands were either extract_vector_elt or undef.

This patch improves that logic and teaches the DAGCombiner how to deal with
build_vector dag nodes where one or more operands are zero. A build_vector
dag node with some zero operands is turned into a shuffle only if the resulting
shuffle mask is legal for the target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222536 91177308-0d34-0410-b5e6-96231b3b80d8

2014-11-21 14:32:06 +00:00

Analysis

AliasSet: Simplify mergeSetIn

2014-11-19 19:36:18 +00:00

AsmParser

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

Bitcode

Add accessor marcos to ConstantPlaceHolder, similar to those in the base class.

2014-11-21 02:42:08 +00:00

CodeGen

[DAG] Teach how to turn a build_vector into a shuffle if some of the operands are zero.