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11 Commits

Author SHA1 Message Date
Florian Hahn 18a1f0818b [InstCombine] Use SimplifyFMulInst to simplify multiply in fma. 
This allows us to fold fma's that multiply with 0.0. Also, the
multiply by 1.0 case is handled there as well. The fneg/fabs cases
are not handled by SimplifyFMulInst, so we need to keep them.

Reviewers: spatel, anemet, lebedev.ri

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D67351

llvm-svn: 371518
 2019-09-10 13:10:28 +00:00
Florian Hahn 8886d0134e [InstCombine] Precommit tests for D67351. 
llvm-svn: 371517
 2019-09-10 13:05:34 +00:00
Cameron McInally 66c25def00 [NFC][InstCombine] Add unary FNeg tests to fma.ll 
llvm-svn: 362227
 2019-05-31 14:49:31 +00:00
Eric Christopher cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Sanjay Patel 2204520e49 [PatternMatch] define m_FNeg using m_FSub 
Using cstfp_pred_ty in the definition allows us to match vectors with undef elements.

This replicates the change for m_Not from D44076 / rL326823 and continues
towards making all pattern matchers allow undef elements in vectors.

llvm-svn: 329303
 2018-04-05 15:36:55 +00:00
Sanjay Patel 2eaa2a43f8 [InstCombine] add vector and vector undef tests for FP folds; NFC 
llvm-svn: 329294
 2018-04-05 15:07:35 +00:00
Simon Pilgrim 5f022d278b [InstCombine] Regenerate FMUL/FMA combine tests with update_test_checks.py 
llvm-svn: 320922
 2017-12-16 17:18:15 +00:00
Matt Arsenault 920576042d InstCombine: Canonicalize fast fmuladd to fmul + fadd 
llvm-svn: 295353
 2017-02-16 18:46:24 +00:00
Matt Arsenault b264c94963 InstCombine: Add fma with constant transforms 
DAGCombine already does these.

llvm-svn: 290860
 2017-01-03 04:32:35 +00:00
Matt Arsenault 1cc294c85d InstCombine: Add fma + fabs/fneg transforms 
fma (fneg x), (fneg y), z -> fma x, y, z
fma (fabs x), (fabs x), z -> fma x, x, z

llvm-svn: 290859
 2017-01-03 04:32:31 +00:00