[PassBuilder][PassManagerBuilder] Run LICM before loop spawning to en…

…sure loop-invariant conditions appear outside of the loop. Addresses llvm#66.
tarunprabhu · Sep 26, 2023 · 92fdd17 · 92fdd17
1 parent 34cc5aa
commit 92fdd17
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1512,7 +1512,8 @@ PassBuilder::buildTapirLoweringPipeline(OptimizationLevel Level,
   // Rotate Loop - disable header duplication at -Oz
   LPM1.addPass(LoopRotatePass(Level != OptimizationLevel::Oz));
   LPM2.addPass(IndVarSimplifyPass());
-  LPM2.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
+  LPM2.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap,
+                        /*AllowSpeculation=*/true));
 
   FunctionPassManager FPM;
   FPM.addPass(createFunctionToLoopPassAdaptor(std::move(LPM1),