[PATCH] D50422: SCEV should forget all loops containing a deleted block.
Alina Sbirlea via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Aug 9 10:53:58 PDT 2018
This revision was automatically updated to reflect the committed changes.
Closed by commit rL339363: SCEV should forget all loops containing a deleted block. (authored by asbirlea, committed by ).
Repository:
rL LLVM
https://reviews.llvm.org/D50422
Files:
llvm/trunk/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
llvm/trunk/test/Transforms/LoopIdiom/scev-invalidation_topmostloop.ll
Index: llvm/trunk/test/Transforms/LoopIdiom/scev-invalidation_topmostloop.ll
===================================================================
--- llvm/trunk/test/Transforms/LoopIdiom/scev-invalidation_topmostloop.ll
+++ llvm/trunk/test/Transforms/LoopIdiom/scev-invalidation_topmostloop.ll
@@ -0,0 +1,25 @@
+; RUN: opt -S -indvars -loop-idiom -verify -loop-simplifycfg -loop-idiom < %s | FileCheck %s
+
+target triple = "x86_64-unknown-linux-gnu"
+
+; CHECK-LABEL: @f1()
+; CHECK-NEXT: entry:
+define void @f1() {
+entry:
+ br label %lbl1
+
+lbl1: ; preds = %if.end, %entry
+ br label %for
+
+for: ; preds = %if.end, %lbl1
+ br label %lor.end
+
+lor.end: ; preds = %for
+ br i1 undef, label %for.end, label %if.end
+
+if.end: ; preds = %lor.end
+ br i1 undef, label %lbl1, label %for
+
+for.end: ; preds = %lor.end
+ ret void
+}
Index: llvm/trunk/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
+++ llvm/trunk/lib/Transforms/Scalar/LoopSimplifyCFG.cpp
@@ -61,7 +61,8 @@
// Merge Succ into Pred and delete it.
MergeBlockIntoPredecessor(Succ, &DTU, &LI);
- SE.forgetLoop(&L);
+ SE.forgetTopmostLoop(&L);
+
Changed = true;
}
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