[PATCH] D44835: [X86][Znver1] Remove ReadAfterLd from BSR/BSF in Zen scheduler model

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, GGanesh.

These are unary instructions not binary. The only source operand are the 5 memory address pieces which are not ReadAfterLd


https://reviews.llvm.org/D44835

Files:
  lib/Target/X86/X86ScheduleZnver1.td


Index: lib/Target/X86/X86ScheduleZnver1.td
===================================================================
--- lib/Target/X86/X86ScheduleZnver1.td
+++ lib/Target/X86/X86ScheduleZnver1.td
@@ -533,7 +533,7 @@
 // r,r.
 def : InstRW<[ZnWriteALULat3], (instregex "BS(R|F)(16|32|64)rr")>;
 // r,m.
-def : InstRW<[ZnWriteALULat3Ld, ReadAfterLd], (instregex "BS(R|F)(16|32|64)rm")>;
+def : InstRW<[ZnWriteALULat3Ld], (instregex "BS(R|F)(16|32|64)rm")>;
 
 // BT.
 // r,r/i.


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