Programming Languages Research Group: Git

[X86] Improve EmitLoweredSelect for contiguous CMOV pseudo instructions.

This change improves EmitLoweredSelect() so that multiple contiguous CMOV pseudo
instructions with the same (or exactly opposite) conditions get lowered using a single
new basic-block. This eliminates unnecessary extra basic-blocks (and CFG merge points)
when contiguous CMOVs are being lowered.

Patch by: kevin.b.smith@intel.com
Differential Revision: http://reviews.llvm.org/D11428

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244202 91177308-0d34-0410-b5e6-96231b3b80d8

author	Michael Kuperstein <michael.m.kuperstein@intel.com>
	Thu, 6 Aug 2015 08:45:34 +0000 (08:45 +0000)
committer	Michael Kuperstein <michael.m.kuperstein@intel.com>
	Thu, 6 Aug 2015 08:45:34 +0000 (08:45 +0000)
commit	1fc0f627b142076f3aa39db6cc9288b673e9cdae
tree	784517a848ebdab4b764203bcae3c30a671e69e7	tree \| snapshot
parent	e29d3ef447f8c4c0dac37d6e89797bc9e075eda8	commit \| diff

lib/Target/X86/X86ISelLowering.cpp		diff \| blob \| history
test/CodeGen/X86/pseudo_cmov_lower.ll	[new file with mode: 0644]	blob
test/CodeGen/X86/pseudo_cmov_lower1.ll	[new file with mode: 0644]	blob
test/CodeGen/X86/pseudo_cmov_lower2.ll	[new file with mode: 0644]	blob