[llvm] r335820 - [SCCP] Mark CFG as preserved.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Thu Jun 28 02:53:38 PDT 2018
Author: fhahn
Date: Thu Jun 28 02:53:38 2018
New Revision: 335820
URL: http://llvm.org/viewvc/llvm-project?rev=335820&view=rev
Log:
[SCCP] Mark CFG as preserved.
SCCP does not change the CFG, so we can mark it as preserved.
Reviewers: dberlin, efriedma, davide
Reviewed By: davide
Differential Revision: https://reviews.llvm.org/D47149
Added:
llvm/trunk/test/Transforms/SCCP/preserve-analysis.ll
Modified:
llvm/trunk/lib/Transforms/Scalar/SCCP.cpp
llvm/trunk/test/Other/opt-O2-pipeline.ll
llvm/trunk/test/Other/opt-O3-pipeline.ll
llvm/trunk/test/Other/opt-Os-pipeline.ll
Modified: llvm/trunk/lib/Transforms/Scalar/SCCP.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/SCCP.cpp?rev=335820&r1=335819&r2=335820&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/SCCP.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/SCCP.cpp Thu Jun 28 02:53:38 2018
@@ -1777,6 +1777,7 @@ PreservedAnalyses SCCPPass::run(Function
auto PA = PreservedAnalyses();
PA.preserve<GlobalsAA>();
+ PA.preserveSet<CFGAnalyses>();
return PA;
}
@@ -1799,6 +1800,7 @@ public:
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<TargetLibraryInfoWrapperPass>();
AU.addPreserved<GlobalsAAWrapperPass>();
+ AU.setPreservesCFG();
}
// runOnFunction - Run the Sparse Conditional Constant Propagation
Modified: llvm/trunk/test/Other/opt-O2-pipeline.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Other/opt-O2-pipeline.ll?rev=335820&r1=335819&r2=335820&view=diff
==============================================================================
--- llvm/trunk/test/Other/opt-O2-pipeline.ll (original)
+++ llvm/trunk/test/Other/opt-O2-pipeline.ll Thu Jun 28 02:53:38 2018
@@ -132,10 +132,8 @@
; CHECK-NEXT: Memory Dependence Analysis
; CHECK-NEXT: MemCpy Optimization
; CHECK-NEXT: Sparse Conditional Constant Propagation
-; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Demanded bits analysis
; CHECK-NEXT: Bit-Tracking Dead Code Elimination
-; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
Modified: llvm/trunk/test/Other/opt-O3-pipeline.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Other/opt-O3-pipeline.ll?rev=335820&r1=335819&r2=335820&view=diff
==============================================================================
--- llvm/trunk/test/Other/opt-O3-pipeline.ll (original)
+++ llvm/trunk/test/Other/opt-O3-pipeline.ll Thu Jun 28 02:53:38 2018
@@ -136,10 +136,8 @@
; CHECK-NEXT: Memory Dependence Analysis
; CHECK-NEXT: MemCpy Optimization
; CHECK-NEXT: Sparse Conditional Constant Propagation
-; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Demanded bits analysis
; CHECK-NEXT: Bit-Tracking Dead Code Elimination
-; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
Modified: llvm/trunk/test/Other/opt-Os-pipeline.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Other/opt-Os-pipeline.ll?rev=335820&r1=335819&r2=335820&view=diff
==============================================================================
--- llvm/trunk/test/Other/opt-Os-pipeline.ll (original)
+++ llvm/trunk/test/Other/opt-Os-pipeline.ll Thu Jun 28 02:53:38 2018
@@ -118,10 +118,8 @@
; CHECK-NEXT: Memory Dependence Analysis
; CHECK-NEXT: MemCpy Optimization
; CHECK-NEXT: Sparse Conditional Constant Propagation
-; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Demanded bits analysis
; CHECK-NEXT: Bit-Tracking Dead Code Elimination
-; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Lazy Branch Probability Analysis
Added: llvm/trunk/test/Transforms/SCCP/preserve-analysis.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/SCCP/preserve-analysis.ll?rev=335820&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/SCCP/preserve-analysis.ll (added)
+++ llvm/trunk/test/Transforms/SCCP/preserve-analysis.ll Thu Jun 28 02:53:38 2018
@@ -0,0 +1,36 @@
+; RUN: opt < %s -debug-pass=Structure -globals-aa -loop-vectorize -sccp -loop-vectorize -globals-aa 2>&1 -S | FileCheck %s
+; RUN: opt < %s -debug-pass-manager -passes='loop-vectorize,sccp,loop-vectorize' 2>&1 -S | FileCheck --check-prefix=NEW-PM %s
+
+; Check CFG-only analysis are preserved by SCCP by running it between 2
+; loop-vectorize runs.
+
+; CHECK: Globals Alias Analysis
+; CHECK: Dominator Tree Construction
+; CHECK: Natural Loop Information
+; CHECK: Basic Alias Analysis (stateless AA impl)
+; CHECK: Sparse Conditional Constant Propagation
+; CHECK-NOT: Dominator Tree Construction
+; CHECK-NOT: Natural Loop Information
+; CHECK-NOT: Basic Alias Analysis (stateless AA impl)
+; CHECK-NOT: Globals Alias Analysis
+; CHECK: Loop Vectorization
+
+; NEW-PM-DAG: Running analysis: LoopAnalysis on test
+; NEW-PM-DAG: Running analysis: DominatorTreeAnalysis on test
+; NEW-PM-DAG: Running analysis: AssumptionAnalysis on test
+; NEW-PM-DAG: Running analysis: TargetLibraryAnalysis on test
+; NEW-PM-DAG: Running analysis: TargetIRAnalysis on test
+; NEW-PM: Running pass: SCCPPass on test
+; NEW-PM-NOT: Running analysis: LoopAnalysis on test
+; NEW-PM-NOT: Running analysis: DominatorTreeAnalysis on test
+; NEW-PM-NOT: Running analysis: AssumptionAnalysis on test
+; NEW-PM-NOT: Running analysis: TargetLibraryAnalysis on test
+; NEW-PM-NOT: Running analysis: TargetIRAnalysis on test
+; NEW-PM: Finished llvm::Function pass manager run.
+
+
+define i32 @test() {
+entry:
+ %res = add i32 1, 10
+ ret i32 %res
+}
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