Make getUniqueExitBlocks's precondition assert more precise, to
avoid spurious failures. This fixes PR5758.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91147 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h
index 9969d99..7419cdc 100644
--- a/include/llvm/Analysis/LoopInfo.h
+++ b/include/llvm/Analysis/LoopInfo.h
@@ -568,7 +568,7 @@
/// getUniqueExitBlocks - Return all unique successor blocks of this loop.
/// These are the blocks _outside of the current loop_ which are branched to.
- /// This assumes that loop is in canonical form.
+ /// This assumes that loop exits are in canonical form.
///
void getUniqueExitBlocks(SmallVectorImpl<BasicBlock *> &ExitBlocks) const;
diff --git a/lib/Analysis/LoopInfo.cpp b/lib/Analysis/LoopInfo.cpp
index 4de756c..34089ee 100644
--- a/lib/Analysis/LoopInfo.cpp
+++ b/lib/Analysis/LoopInfo.cpp
@@ -316,12 +316,12 @@
/// getUniqueExitBlocks - Return all unique successor blocks of this loop.
/// These are the blocks _outside of the current loop_ which are branched to.
-/// This assumes that loop is in canonical form.
+/// This assumes that loop exits are in canonical form.
///
void
Loop::getUniqueExitBlocks(SmallVectorImpl<BasicBlock *> &ExitBlocks) const {
- assert(isLoopSimplifyForm() &&
- "getUniqueExitBlocks assumes the loop is in canonical form!");
+ assert(hasDedicatedExits() &&
+ "getUniqueExitBlocks assumes the loop has canonical form exits!");
// Sort the blocks vector so that we can use binary search to do quick
// lookups.
diff --git a/test/Transforms/IndVarSimplify/indirectbr.ll b/test/Transforms/IndVarSimplify/indirectbr.ll
new file mode 100644
index 0000000..b4ce153
--- /dev/null
+++ b/test/Transforms/IndVarSimplify/indirectbr.ll
@@ -0,0 +1,22 @@
+; RUN: opt < %s -indvars -S -disable-output
+; PR5758
+
+define zeroext i1 @foo() nounwind {
+entry:
+ indirectbr i8* undef, [label %"202", label %"133"]
+
+"132": ; preds = %"133"
+ %0 = add i32 %1, 1 ; <i32> [#uses=1]
+ br label %"133"
+
+"133": ; preds = %"132", %entry
+ %1 = phi i32 [ %0, %"132" ], [ 0, %entry ] ; <i32> [#uses=2]
+ %2 = icmp eq i32 %1, 4 ; <i1> [#uses=1]
+ br i1 %2, label %"134", label %"132"
+
+"134": ; preds = %"133"
+ ret i1 true
+
+"202": ; preds = %entry
+ ret i1 false
+}