Commit Graph

12 Commits

Author SHA1 Message Date
Craig Topper 0d47fdcf3f [X86] Remove sse1 intrinsic tests from the avx intrinsics test file.
They are all covered by the SSE intrinsics test with SSE, AVX, and AVX512 command lines.

Also remove an unneeded sfence intrinsic test since it was already covered.

llvm-svn: 295699
2017-02-21 07:32:03 +00:00
Gadi Haber 19c4fc5e62 This is a large patch for X86 AVX-512 of an optimization for reducing code size by encoding EVEX AVX-512 instructions using the shorter VEX encoding when possible.
There are cases of AVX-512 instructions that have two possible encodings. This is the case with instructions that use vector registers with low indexes of 0 - 15 and do not use the zmm registers or the mask k registers.
The EVEX encoding prefix requires 4 bytes whereas the VEX prefix can take only up to 3 bytes. Consequently, using the VEX encoding for these instructions results in a code size reduction of ~2 bytes even though it is compiled with the AVX-512 features enabled.

Reviewers: Craig Topper, Zvi Rackoover, Elena Demikhovsky 
Differential Revision: https://reviews.llvm.org/D27901

llvm-svn: 290663
2016-12-28 10:12:48 +00:00
Craig Topper 6910fa0ef4 [X86] Remove the scalar intrinsics for fadd/fsub/fdiv/fmul
Summary: These intrinsics have been unused for clang for a while. This patch removes them. We auto upgrade them to extractelements, a scalar operation and then an insertelement. This matches the sequence used by clangs intrinsic file.

Reviewers: zvi, delena, RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D26660

llvm-svn: 287083
2016-11-16 05:24:10 +00:00
Craig Topper a4a51f1afe [AVX-512] Add -show-mc-encoding to legacy vector intrinsic tests so we can see when VEX or EVEX encoded instructions are being emitted. Make sure the tests all have an avx2 command line and an skx command line.
llvm-svn: 286055
2016-11-06 02:03:58 +00:00
Michael Kuperstein 3e3652aef2 Recommit r274692 - [X86] Transform setcc + movzbl into xorl + setcc
xorl + setcc is generally the preferred sequence due to the partial register
stall setcc + movzbl suffers from. As a bonus, it also encodes one byte smaller.
This fixes PR28146.

The original commit tried inserting an 8bit-subreg into a GR32 (not GR32_ABCD)
which was not appreciated by fast regalloc on 32-bit.

llvm-svn: 274802
2016-07-07 22:50:23 +00:00
Michael Kuperstein edb38a94f8 Revert r274692 to check whether this is what breaks windows selfhost.
llvm-svn: 274771
2016-07-07 16:55:35 +00:00
Michael Kuperstein 1ef6c59b1d [X86] Transform setcc + movzbl into xorl + setcc
xorl + setcc is generally the preferred sequence due to the partial register
stall setcc + movzbl suffers from. As a bonus, it also encodes one byte smaller.

This fixes PR28146.

Differential Revision: http://reviews.llvm.org/D21774

llvm-svn: 274692
2016-07-06 21:56:18 +00:00
Craig Topper 8287fd8abd [X86] Remove SSE/AVX unaligned store intrinsics as clang no longer uses them. Auto upgrade to native unaligned store instructions.
llvm-svn: 271236
2016-05-30 23:15:56 +00:00
Elena Demikhovsky e79b716daf Fixed lowering of _comi_ intrinsics from all sets - SSE/SSE2/AVX/AVX-512
Differential revision http://reviews.llvm.org/D19261

llvm-svn: 269569
2016-05-14 15:06:09 +00:00
Elena Demikhovsky 24aba1ca38 The test files are auto-generated by update_llc_test_checks.py utility.
No functional changes.

llvm-svn: 268498
2016-05-04 14:31:18 +00:00
Elena Demikhovsky 4aed59fc89 AVX-512: Enabled SSE intrinsics on AVX-512.
Predicate UseAVX depricates pattern selection on AVX-512.
This predicate is necessary for DAG selection to select EVEX form.
But mapping SSE intrinsics to AVX-512 instructions is not ready yet.
So I replaced UseAVX with HasAVX for intrinsics patterns.

llvm-svn: 237903
2015-05-21 14:01:32 +00:00
Craig Topper 5b7c2b4f0d Add tests for SSE intrinsics in non-avx mode by copying from the AVX test cases. Some of these may have been tested by other tests, but most weren't. Patch by Cameron McInally.
llvm-svn: 193309
2013-10-24 06:45:13 +00:00