llvm-project

Commit Graph

Author	SHA1	Message	Date
Sanjay Patel	c8d88ad1a9	[CodeGenPrepare][x86] shift both sides of a vector select when profitable This is based on the example/discussion in PR37428: https://bugs.llvm.org/show_bug.cgi?id=37428 Proper vector shift instructions don't appear until AVX2, so we may generate several extra instructions within a loop trying to compensate for that. It's difficult to recover from that shift expansion later than this, so use the existing TLI hook and splat analysis to enable better codegen. This extends CGP functionality introduced with: rL201655 Differential Revision: https://reviews.llvm.org/D63233 llvm-svn: 363511	2019-06-16 15:29:03 +00:00
Sanjay Patel	7ea378b940	[CodeGenPrepare] propagate debuginfo when copying a shuffle llvm-svn: 363409	2019-06-14 15:05:35 +00:00
Sanjay Patel	a1421e8347	[x86] add tests for vector shifts; NFC llvm-svn: 363203	2019-06-12 21:30:06 +00:00

Author

SHA1

Message

Date

Sanjay Patel

c8d88ad1a9

[CodeGenPrepare][x86] shift both sides of a vector select when profitable

This is based on the example/discussion in PR37428:
https://bugs.llvm.org/show_bug.cgi?id=37428

Proper vector shift instructions don't appear until AVX2, so we may generate several
extra instructions within a loop trying to compensate for that. It's difficult to
recover from that shift expansion later than this, so use the existing TLI hook and
splat analysis to enable better codegen.

This extends CGP functionality introduced with:
rL201655

Differential Revision: https://reviews.llvm.org/D63233

llvm-svn: 363511

2019-06-16 15:29:03 +00:00

Sanjay Patel

7ea378b940

[CodeGenPrepare] propagate debuginfo when copying a shuffle

llvm-svn: 363409

2019-06-14 15:05:35 +00:00

Sanjay Patel

a1421e8347

[x86] add tests for vector shifts; NFC

llvm-svn: 363203

2019-06-12 21:30:06 +00:00

3 Commits