Programming Languages Research Group: Git

author	Sanjay Patel <spatel@rotateright.com>
	Wed, 9 Jul 2014 16:34:54 +0000 (16:34 +0000)
committer	Sanjay Patel <spatel@rotateright.com>
	Wed, 9 Jul 2014 16:34:54 +0000 (16:34 +0000)
commit	296cb7b128114eda207f96c65513335efe46a1d5
tree	9251508370989a168ba6c4e305d710b6294d62d8	tree \| snapshot
parent	6a6556695e2e3c983a95d6dd78d601f857b861ab	commit \| diff

Fix for PR20059 (instcombine reorders shufflevector after instruction that may trap)

In PR20059 ( http://llvm.org/pr20059 ), instcombine eliminates shuffles that are necessary before performing an operation that can trap (srem).

This patch calls isSafeToSpeculativelyExecute() and bails out of the optimization in SimplifyVectorOp() if needed.

Differential Revision: http://reviews.llvm.org/D4424

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212629 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/InstCombine/InstructionCombining.cpp		diff \| blob \| history
test/Transforms/InstCombine/pr20059.ll	[new file with mode: 0644]	blob