llvm-project

Commit Graph

Author	SHA1	Message	Date
Amjad Aboud	4f97751798	[X86] Generate VZEROUPPER for Skylake-avx512. VZEROUPPER should not be issued on Knights Landing (KNL), but on Skylake-avx512 it should be. Differential Revision: https://reviews.llvm.org/D29874 llvm-svn: 296859	2017-03-03 09:03:24 +00:00
Craig Topper	6a35a81fc5	[X86] In LowerTRUNCATE, create an ISD::VECTOR_SHUFFLE instead of explicitly creating a PSHUFB. This will be lowered by regular shuffle lowering to a PSHUFB later. Similar was already done for several other shuffles in this function. The test changes are because the old code used explicity zeroing for elements that could have been undef. While I was here I also changed other shuffle vectors in the same function to use the same input twice instead of creating UNDEF nodes. getVectorShuffle can create the UNDEF for us. llvm-svn: 294130	2017-02-05 18:33:14 +00:00
Zvi Rackover	b10f7de3b5	[X86] Add test cases that cover pr31551. NFC. llvm-svn: 291127	2017-01-05 16:48:28 +00:00

Author

SHA1

Message

Date

Amjad Aboud

4f97751798

[X86] Generate VZEROUPPER for Skylake-avx512.

VZEROUPPER should not be issued on Knights Landing (KNL), but on Skylake-avx512 it should be.

Differential Revision: https://reviews.llvm.org/D29874

llvm-svn: 296859

2017-03-03 09:03:24 +00:00

Craig Topper

6a35a81fc5

[X86] In LowerTRUNCATE, create an ISD::VECTOR_SHUFFLE instead of explicitly creating a PSHUFB. This will be lowered by regular shuffle lowering to a PSHUFB later.

Similar was already done for several other shuffles in this function.

The test changes are because the old code used explicity zeroing for elements that could have been undef.

While I was here I also changed other shuffle vectors in the same function to use the same input twice instead of creating UNDEF nodes. getVectorShuffle can create the UNDEF for us.

llvm-svn: 294130

2017-02-05 18:33:14 +00:00

Zvi Rackover

b10f7de3b5

[X86] Add test cases that cover pr31551. NFC.

llvm-svn: 291127

2017-01-05 16:48:28 +00:00

3 Commits