LSR: fix IVUsers isSimplifiedLoopNest to perform a full domtree walk
instead of skipping the current loop.
My prior fix was incomplete because of an overzealous compile-time optimization:
Better fix for: <rdar://problem/11049788> Segmentation fault: 11 in LoopStrengthReduce
llvm-svn: 153131
diff --git a/llvm/test/Transforms/LoopStrengthReduce/2012-03-15-nopreheader.ll b/llvm/test/Transforms/LoopStrengthReduce/2012-03-15-nopreheader.ll
index 207e9d7..01f9276 100644
--- a/llvm/test/Transforms/LoopStrengthReduce/2012-03-15-nopreheader.ll
+++ b/llvm/test/Transforms/LoopStrengthReduce/2012-03-15-nopreheader.ll
@@ -48,3 +48,76 @@
return: ; preds = %if.end677, %doshell, %if.then96
ret void
}
+
+define void @nopreheader2() nounwind ssp {
+entry:
+ indirectbr i8* undef, [label %while.cond, label %return]
+
+while.cond: ; preds = %while.cond.backedge, %entry
+ indirectbr i8* undef, [label %while.cond.backedge, label %lor.rhs]
+
+lor.rhs: ; preds = %while.cond
+ indirectbr i8* undef, [label %while.cond.backedge, label %while.end]
+
+while.cond.backedge: ; preds = %lor.rhs, %while.cond
+ indirectbr i8* undef, [label %while.cond]
+
+while.end: ; preds = %lor.rhs
+ indirectbr i8* undef, [label %if.then18, label %return]
+
+if.then18: ; preds = %while.end
+ indirectbr i8* undef, [label %if.end35, label %lor.lhs.false]
+
+lor.lhs.false: ; preds = %if.then18
+ indirectbr i8* undef, [label %if.end35, label %return]
+
+if.end35: ; preds = %lor.lhs.false, %if.then18
+ indirectbr i8* undef, [label %while.cond36]
+
+while.cond36: ; preds = %while.body49, %if.end35
+ %0 = phi i64 [ %indvar.next13, %while.body49 ], [ 0, %if.end35 ]
+ indirectbr i8* undef, [label %while.body49, label %lor.rhs42]
+
+lor.rhs42: ; preds = %while.cond36
+ indirectbr i8* undef, [label %while.body49, label %while.end52]
+
+while.body49: ; preds = %lor.rhs42, %while.cond36
+ %indvar.next13 = add i64 %0, 1
+ indirectbr i8* undef, [label %while.cond36]
+
+while.end52: ; preds = %lor.rhs42
+ indirectbr i8* undef, [label %land.lhs.true, label %return]
+
+land.lhs.true: ; preds = %while.end52
+ indirectbr i8* undef, [label %while.cond66.preheader, label %return]
+
+while.cond66.preheader: ; preds = %land.lhs.true
+ indirectbr i8* undef, [label %while.cond66]
+
+while.cond66: ; preds = %while.body77, %while.cond66.preheader
+ indirectbr i8* undef, [label %land.rhs, label %while.cond81.preheader]
+
+land.rhs: ; preds = %while.cond66
+ indirectbr i8* undef, [label %while.body77, label %while.cond81.preheader]
+
+while.cond81.preheader: ; preds = %land.rhs, %while.cond66
+ %tmp45 = add i64 undef, %0
+ %tmp46 = add i64 %tmp45, undef
+ indirectbr i8* undef, [label %while.cond81]
+
+while.body77: ; preds = %land.rhs
+ indirectbr i8* undef, [label %while.cond66]
+
+while.cond81: ; preds = %while.body94, %while.cond81.preheader
+ %tmp25 = add i64 %tmp46, undef
+ indirectbr i8* undef, [label %while.body94, label %lor.rhs87]
+
+lor.rhs87: ; preds = %while.cond81
+ indirectbr i8* undef, [label %while.body94, label %return]
+
+while.body94: ; preds = %lor.rhs87, %while.cond81
+ indirectbr i8* undef, [label %while.cond81]
+
+return: ; preds = %if.end216, %land.lhs.true183, %land.lhs.true, %while.end52, %lor.lhs.false, %while.end, %entry
+ ret void
+}