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llvm-project/llvm/test/Transforms/ConstantHoisting
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Matthias Braun d6131c9633 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

llvm-svn: 344315
 		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
…
X86 X86/TargetTransformInfo: Report div/rem constant immediate costs as TCC_Free 2018-10-11 23:14:35 +00:00