Matthias Braun f7c87d986f X86/TargetTransformInfo: Report div/rem constant immediate costs as TCC_Free ...

DIV/REM by constants should always be expanded into mul/shift/etc.
patterns. Unfortunately the ConstantHoisting pass runs too early at a
point where the pattern isn't expanded yet. However after
ConstantHoisting hoisted some immediate the result may not expand
anymore. Also the hoisting typically doesn't make sense because it
operates on immediates that will change completely during the expansion.

Report DIV/REM as TCC_Free so ConstantHoisting will not touch them.

Differential Revision: https://reviews.llvm.org/D53174

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344315 91177308-0d34-0410-b5e6-96231b3b80d8

2018-10-11 23:14:35 +00:00

..

AArch64

Revert "Revert r341269: [Constant Hoisting] Hoisting Constant GEP Expressions"

2018-09-04 22:17:03 +00:00

ARM

Revert "Revert r341269: [Constant Hoisting] Hoisting Constant GEP Expressions"

2018-09-04 22:17:03 +00:00

PowerPC

[opaque pointer type] Add textual IR support for explicit type parameter to load instruction

2015-02-27 21:17:42 +00:00

X86

X86/TargetTransformInfo: Report div/rem constant immediate costs as TCC_Free

2018-10-11 23:14:35 +00:00