Florian Hahn 9b937a2740 [InstCombine] Limit FMul constant folding for fma simplifications. ...

As @reames pointed out post-commit, rL371518 adds additional rounding
in some cases, when doing constant folding of the multiplication.
This breaks a guarantee llvm.fma makes and must be avoided.

This patch reapplies rL371518, but splits off the simplifications not
requiring rounding from SimplifFMulInst as SimplifyFMAFMul.

Reviewers: spatel, lebedev.ri, reames, scanon

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D67434

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372899 91177308-0d34-0410-b5e6-96231b3b80d8

2019-09-25 17:03:20 +00:00

..

AggressiveInstCombine

[PatternMatch] Make m_Br more flexible, add matchers for BB values.

2019-09-25 15:05:08 +00:00

Coroutines

[llvm] Migrate llvm::make_unique to std::make_unique

2019-08-15 15:54:37 +00:00

Hello

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00

InstCombine

[InstCombine] Limit FMul constant folding for fma simplifications.

2019-09-25 17:03:20 +00:00

Instrumentation

[AddressSanitizer] Don't dereference dyn_cast<ConstantInt> results. NFCI.

2019-09-20 20:52:21 +00:00

IPO

HotColdSplitting: invalidate the AssumptionCache on split

2019-09-23 22:23:01 +00:00

ObjCARC

[ObjC][ARC] Skip debug instructions when computing the insert point of

2019-09-19 20:58:51 +00:00

Scalar

[Debuginfo] dbg.value points to undef value after Induction Variable Simplification.

2019-09-24 08:47:03 +00:00

Utils

[SimplifyCFG] FoldTwoEntryPHINode - silence static analyzer null dereference warning. NFCI.

2019-09-24 11:17:20 +00:00

Vectorize

LoopVectorize - silence static analyzer dyn_cast<CmpInst> null dereference warning. NFCI.

2019-09-24 11:27:38 +00:00

CMakeLists.txt

Another try to commit 323321 (aggressive instruction combine).

2018-01-25 12:06:32 +00:00

LLVMBuild.txt

Update the file headers across all of the LLVM projects in the monorepo

2019-01-19 08:50:56 +00:00