LSR wants to split the landing pad's critical edge. Let it do it, but use the

proper function to do it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138550 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 2d93cac11cc2dc811d89c626cc81f4a21411aa40..3938ab6955e645705cdc58651be558cd4cbda9c9 100644 (file)
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -3625,7 +3625,14 @@ void LSRInstance::RewriteForPHI(PHINode *PN,
         Loop *PNLoop = LI.getLoopFor(Parent);
         if (!PNLoop || Parent != PNLoop->getHeader()) {
           // Split the critical edge.
-          BasicBlock *NewBB = SplitCriticalEdge(BB, Parent, P);
+          BasicBlock *NewBB = 0;
+          if (!Parent->isLandingPad()) {
+            NewBB = SplitCriticalEdge(BB, Parent, P);
+          } else {
+            SmallVector<BasicBlock*, 2> NewBBs;
+            SplitLandingPadPredecessors(Parent, BB, "", "", P, NewBBs);
+            NewBB = NewBBs[0];
+          }
 
           // If PN is outside of the loop and BB is in the loop, we want to
           // move the block to be immediately before the PHI block, not

diff --git a/test/CodeGen/Generic/exception-handling.ll b/test/CodeGen/Generic/exception-handling.ll
new file mode 100644 (file)
index 0000000..376e1f1
--- /dev/null
+++ b/test/CodeGen/Generic/exception-handling.ll
@@ -0,0 +1,29 @@
+; RUN: llc < %s
+; PR10733
+declare void @_Znam()
+
+define void @_ZNK14gIndexOdometer15AfterExcisionOfERi() uwtable align 2 {
+_ZN6Gambit5ArrayIiEC2Ej.exit36:
+  br label %"9"
+
+"9":                                              ; preds = %"10", %_ZN6Gambit5ArrayIiEC2Ej.exit36
+  %indvar82 = phi i64 [ 0, %_ZN6Gambit5ArrayIiEC2Ej.exit36 ], [ %tmp85, %"10" ]
+  %tmp85 = add i64 %indvar82, 1
+  %tmp = trunc i64 %tmp85 to i32
+  invoke void @_ZNK14gIndexOdometer9NoIndicesEv()
+          to label %"10" unwind label %lpad27
+
+"10":                                             ; preds = %"9"
+  invoke void @_Znam()
+          to label %"9" unwind label %lpad27
+
+lpad27:                                           ; preds = %"10", %"9"
+  %0 = phi i32 [ undef, %"9" ], [ %tmp, %"10" ]
+  %1 = landingpad { i8*, i32 } personality i32 (i32, i64, i8*, i8*)* @__gxx_personality_v0
+          cleanup
+  resume { i8*, i32 } zeroinitializer
+}
+
+declare void @_ZNK14gIndexOdometer9NoIndicesEv()
+
+declare i32 @__gxx_personality_v0(i32, i64, i8*, i8*)