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Revert "Recommit "[LoopFlatten] Enable it by default"" 

This reverts commit 5b9597f59a.

A miscompilation was reported:
https://github.com/llvm/llvm-project/issues/58441

Reverting this while I look at that.
This commit is contained in:
Sjoerd Meijer 2022-10-18 23:24:04 +05:30
parent 3dfc39db58
commit f7c42a278b
10 changed files with 1 additions and 10 deletions
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1
llvm/docs/ReleaseNotes.rst
View File

@ -12,7 +12,6 @@ LLVM |release| Release Notes
Release notes for previous releases can be found on
`the Download Page <https://releases.llvm.org/download.html>`_.
* The LoopFlatten pass is now enabled by default.
Introduction
============

2
llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
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@ -83,7 +83,7 @@ cl::opt<bool> EnableUnrollAndJam("enable-unroll-and-jam", cl::init(false),
cl::Hidden,
cl::desc("Enable Unroll And Jam Pass"));
cl::opt<bool> EnableLoopFlatten("enable-loop-flatten", cl::init(true),
cl::opt<bool> EnableLoopFlatten("enable-loop-flatten", cl::init(false),
cl::Hidden,
cl::desc("Enable the LoopFlatten Pass"));

1
llvm/lib/Transforms/Scalar/LoopFlatten.cpp
View File

@ -762,7 +762,6 @@ static bool DoFlattenLoopPair(FlattenInfo &FI, DominatorTree *DT, LoopInfo *LI,
// deleted, and any information that have about the outer loop invalidated.
SE->forgetLoop(FI.OuterLoop);
SE->forgetLoop(FI.InnerLoop);
SE->forgetLoopDispositions();
if (U)
U->markLoopAsDeleted(*FI.InnerLoop, FI.InnerLoop->getName());
LI->erase(FI.InnerLoop);

1
llvm/test/Other/new-pm-defaults.ll
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@ -174,7 +174,6 @@
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopFlattenPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass

1
llvm/test/Other/new-pm-lto-defaults.ll
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@ -116,7 +116,6 @@
; CHECK-O23SZ-NEXT: Running pass: MergedLoadStoreMotionPass on foo
; CHECK-O23SZ-NEXT: Running pass: LoopSimplifyPass on foo
; CHECK-O23SZ-NEXT: Running pass: LCSSAPass on foo
; CHECK-O23SZ-NEXT: Running pass: LoopFlattenPass on loop
; CHECK-O23SZ-NEXT: Running pass: IndVarSimplifyPass on loop
; CHECK-O23SZ-NEXT: Running pass: LoopDeletionPass on loop
; CHECK-O23SZ-NEXT: Running pass: LoopFullUnrollPass on loop

1
llvm/test/Other/new-pm-thinlto-defaults.ll
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@ -149,7 +149,6 @@
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopFlattenPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass

1
llvm/test/Other/new-pm-thinlto-postlink-pgo-defaults.ll
View File

@ -110,7 +110,6 @@
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopFlattenPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass

1
llvm/test/Other/new-pm-thinlto-postlink-samplepgo-defaults.ll
View File

@ -119,7 +119,6 @@
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopFlattenPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass

1
llvm/test/Other/new-pm-thinlto-prelink-pgo-defaults.ll
View File

@ -148,7 +148,6 @@
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopFlattenPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass

1
llvm/test/Other/new-pm-thinlto-prelink-samplepgo-defaults.ll
View File

@ -114,7 +114,6 @@
; CHECK-O-NEXT: Running pass: LICM
; CHECK-O-NEXT: Running pass: SimpleLoopUnswitchPass
; CHECK-O-NEXT: Running analysis: OuterAnalysisManagerProxy
; CHECK-O-NEXT: Running pass: LoopFlattenPass
; CHECK-O-NEXT: Running pass: SimplifyCFGPass
; CHECK-O-NEXT: Running pass: InstCombinePass
; CHECK-O-NEXT: Running pass: LoopSimplifyPass