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

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proper function to do it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138550 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-08-25 05:55:40 +00:00
parent 2df9f8df95
commit 8b6af8a2a9
2 changed files with 37 additions and 1 deletions
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9
lib/Transforms/Scalar/LoopStrengthReduce.cpp
View File

@ -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

29
test/CodeGen/Generic/exception-handling.ll Normal file
View File

@ -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*)