[PATCH] D95796: [NewPM][Unswitch] Add option to disable -O3 non-trivial unswitching
Arthur Eubanks via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Feb 1 11:12:25 PST 2021
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG7739f9ff974a: [NewPM][Unswitch] Add option to disable -O3 non-trivial unswitching (authored by aeubanks).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D95796/new/
https://reviews.llvm.org/D95796
Files:
llvm/lib/Passes/PassBuilder.cpp
llvm/test/Transforms/SimpleLoopUnswitch/pipeline.ll
Index: llvm/test/Transforms/SimpleLoopUnswitch/pipeline.ll
===================================================================
--- llvm/test/Transforms/SimpleLoopUnswitch/pipeline.ll
+++ llvm/test/Transforms/SimpleLoopUnswitch/pipeline.ll
@@ -1,6 +1,7 @@
; RUN: opt < %s -S -passes="default<O1>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
; RUN: opt < %s -S -passes="default<O2>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
; RUN: opt < %s -S -passes="default<O3>" | FileCheck %s -check-prefixes=NONTRIVIAL,CHECK
+; RUN: opt < %s -S -passes="default<O3>" -enable-npm-O3-nontrivial-unswitch=0 | FileCheck %s -check-prefixes=TRIVIAL,CHECK
; RUN: opt < %s -S -passes="default<Os>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
; RUN: opt < %s -S -passes="default<Oz>" | FileCheck %s -check-prefixes=TRIVIAL,CHECK
Index: llvm/lib/Passes/PassBuilder.cpp
===================================================================
--- llvm/lib/Passes/PassBuilder.cpp
+++ llvm/lib/Passes/PassBuilder.cpp
@@ -274,6 +274,10 @@
cl::desc("Perform mandatory inlinings module-wide, before performing "
"inlining."));
+static cl::opt<bool> EnableO3NonTrivialUnswitching(
+ "enable-npm-O3-nontrivial-unswitch", cl::init(true), cl::Hidden,
+ cl::ZeroOrMore, cl::desc("Enable non-trivial loop unswitching for -O3"));
+
PipelineTuningOptions::PipelineTuningOptions() {
LoopInterleaving = true;
LoopVectorization = true;
@@ -726,7 +730,8 @@
// TODO: Investigate promotion cap for O1.
LPM1.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap));
LPM1.addPass(
- SimpleLoopUnswitchPass(/* NonTrivial */ Level == OptimizationLevel::O3));
+ SimpleLoopUnswitchPass(/* NonTrivial */ Level == OptimizationLevel::O3 &&
+ EnableO3NonTrivialUnswitching));
LPM2.addPass(LoopIdiomRecognizePass());
LPM2.addPass(IndVarSimplifyPass());
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