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[Passes] Run GlobalsAA before LICM during LTO in new PM.

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This patch adjusts the LTO pipeline in the new PM to run GlobalsAA
before LICM to match the legacy PM.

This fixes a regression where the new PM failed to vectorize loops that
require hoisting/sinking by LICM depending on GlobalsAA info.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D102345
This commit is contained in:
Florian Hahn 2021-05-13 12:53:05 +01:00
parent 1a1f34e55c
commit d9eecce8c3
3 changed files with 15 additions and 7 deletions
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10
lib/Passes/PassBuilder.cpp
View File

@ -1821,10 +1821,16 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
MPM.addPass(
createModuleToPostOrderCGSCCPassAdaptor(PostOrderFunctionAttrsPass()));
// FIXME: here we run IP alias analysis in the legacy PM.
// Require the GlobalsAA analysis for the module so we can query it within
// MainFPM.
MPM.addPass(RequireAnalysisPass<GlobalsAA, Module>());
// Invalidate AAManager so it can be recreated and pick up the newly available
// GlobalsAA.
MPM.addPass(
createModuleToFunctionPassAdaptor(InvalidateAnalysisPass<AAManager>()));
FunctionPassManager MainFPM;
MainFPM.addPass(createFunctionToLoopPassAdaptor(
LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap),
EnableMSSALoopDependency, /*UseBlockFrequencyInfo=*/true));

5
test/Other/new-pm-lto-defaults.ll
View File

@ -79,10 +79,15 @@
; CHECK-O23SZ-NEXT: Running pass: SROA on foo
; CHECK-O23SZ-NEXT: Running pass: TailCallElimPass on foo
; CHECK-O23SZ-NEXT: Running pass: PostOrderFunctionAttrsPass on (foo)
; CHECK-O23SZ-NEXT: Running pass: RequireAnalysisPass<llvm::GlobalsAA, llvm::Module> on [module]
; CHECK-O23SZ-NEXT: Running analysis: GlobalsAA on [module]
; CHECK-O23SZ-NEXT: Running pass: InvalidateAnalysisPass<llvm::AAManager> on foo
; CHECK-O23SZ-NEXT: Invalidating analysis: AAManager on foo
; CHECK-O23SZ-NEXT: Running pass: LoopSimplifyPass on foo
; CHECK-O23SZ-NEXT: Running analysis: LoopAnalysis on foo
; CHECK-O23SZ-NEXT: Running pass: LCSSAPass on foo
; CHECK-O23SZ-NEXT: Running analysis: MemorySSAAnalysis on foo
; CHECK-O23SZ-NEXT: Running analysis: AAManager on foo
; CHECK-O23SZ-NEXT: Running analysis: ScalarEvolutionAnalysis on foo
; CHECK-O23SZ-NEXT: Running analysis: InnerAnalysisManagerProxy
; CHECK-O23SZ-NEXT: Running pass: LICMPass on Loop

7
test/Transforms/PhaseOrdering/AArch64/globals-aa-required-for-vectorization.ll
View File

@ -1,5 +1,5 @@
; RUN: opt -passes='lto<O3>' -S %s | FileCheck %s
; RUN: opt -std-link-opts -enable-new-pm=false -S %s | FileCheck --check-prefix=LEGACY %s
; RUN: opt -std-link-opts -enable-new-pm=false -S %s | FileCheck %s
target triple = "arm64e-apple-darwin"
@ -9,10 +9,7 @@ target triple = "arm64e-apple-darwin"
@D = external unnamed_addr global i32, align 4
; CHECK-LABEL: @fn
; CHECK-NOT: vector.body:
;
; LEGACY-LABEL: @fn
; LEGACY: vector.body:
; CHECK: vector.body:
;
define void @fn() {
entry: