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[PM] Cleanup a dead option to critical edge splitting that I noticed

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while refactoring this API for the new pass manager.

No functionality changed here, the code didn't actually support this
option.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226457 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth 2015-01-19 12:12:00 +00:00
parent 08962f208b
commit adf74a6403
2 changed files with 4 additions and 15 deletions
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15
include/llvm/Transforms/Utils/BasicBlockUtils.h
View File

@ -86,27 +86,23 @@ struct CriticalEdgeSplittingOptions {
LoopInfo *LI;
bool MergeIdenticalEdges;
bool DontDeleteUselessPHIs;
bool SplitLandingPads;
bool PreserveLCSSA;
CriticalEdgeSplittingOptions()
: AA(nullptr), DT(nullptr), LI(nullptr), MergeIdenticalEdges(false),
DontDeleteUselessPHIs(false), SplitLandingPads(false),
PreserveLCSSA(false) {}
DontDeleteUselessPHIs(false), PreserveLCSSA(false) {}
/// \brief Basic case of setting up all the analysis.
CriticalEdgeSplittingOptions(AliasAnalysis *AA, DominatorTree *DT = nullptr,
LoopInfo *LI = nullptr)
: AA(AA), DT(DT), LI(LI), MergeIdenticalEdges(false),
DontDeleteUselessPHIs(false), SplitLandingPads(false),
PreserveLCSSA(false) {}
DontDeleteUselessPHIs(false), PreserveLCSSA(false) {}
/// \brief A common pattern is to preserve the dominator tree and loop
/// info but not care about AA.
CriticalEdgeSplittingOptions(DominatorTree *DT, LoopInfo *LI)
: AA(nullptr), DT(DT), LI(LI), MergeIdenticalEdges(false),
DontDeleteUselessPHIs(false), SplitLandingPads(false),
PreserveLCSSA(false) {}
DontDeleteUselessPHIs(false), PreserveLCSSA(false) {}
CriticalEdgeSplittingOptions &setMergeIdenticalEdges() {
MergeIdenticalEdges = true;
@ -118,11 +114,6 @@ struct CriticalEdgeSplittingOptions {
return *this;
}
CriticalEdgeSplittingOptions &setSplitLandingPads() {
SplitLandingPads = true;
return *this;
}
CriticalEdgeSplittingOptions &setPreserveLCSSA() {
PreserveLCSSA = true;
return *this;

4
lib/Transforms/Scalar/LoopUnswitch.cpp
View File

@ -706,9 +706,7 @@ void LoopUnswitch::EmitPreheaderBranchOnCondition(Value *LIC, Constant *Val,
// If either edge is critical, split it. This helps preserve LoopSimplify
// form for enclosing loops.
auto Options = CriticalEdgeSplittingOptions(DT, LI)
.setPreserveLCSSA()
.setSplitLandingPads();
auto Options = CriticalEdgeSplittingOptions(DT, LI).setPreserveLCSSA();
SplitCriticalEdge(BI, 0, Options);
SplitCriticalEdge(BI, 1, Options);
}