[llvm-bugs] [Bug 42863] New: [DAGCombine] Convert isNegatibleForFree/GetNegatedExpression to a target hook
via llvm-bugs
llvm-bugs at lists.llvm.org
Thu Aug 1 08:43:13 PDT 2019
https://bugs.llvm.org/show_bug.cgi?id=42863
Bug ID: 42863
Summary: [DAGCombine] Convert
isNegatibleForFree/GetNegatedExpression to a target
hook
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedbugs at nondot.org
Reporter: llvm-dev at redking.me.uk
CC: llvm-bugs at lists.llvm.org, Matthew.Arsenault at amd.com,
spatel+llvm at rotateright.com
I'm hoping to get https://reviews.llvm.org/D63141 completed soon, after which
we should investigate refactoring isNegatibleForFree/GetNegatedExpression so
they can be used with target nodes as well.
This would encompass most of X86ISelLowering's combineFneg,
AMDGPUTargetLowering::performFNegCombine and probably others as well.
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