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[VPlan] Skip disconnected exit blocks in hasEarlyExit. #151718

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Merged
merged 1 commit into from
Aug 4, 2025
Merged

[VPlan] Skip disconnected exit blocks in hasEarlyExit. #151718

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5 changes: 4 additions & 1 deletion llvm/lib/Transforms/Vectorize/VPlan.h
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Original file line number Diff line number Diff line change
Expand Up @@ -4229,7 +4229,10 @@ class VPlan {
/// block with multiple predecessors (one for the exit via the latch and one
/// via the other early exit).
bool hasEarlyExit() const {
return ExitBlocks.size() > 1 ||
return count_if(ExitBlocks,
[](VPIRBasicBlock *EB) {
return EB->getNumPredecessors() != 0;
}) > 1 ||
(ExitBlocks.size() == 1 && ExitBlocks[0]->getNumPredecessors() > 1);
}

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2 changes: 1 addition & 1 deletion llvm/test/Transforms/LoopVectorize/vect.stats.ll
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Expand Up @@ -5,7 +5,7 @@
; vectorized) and the third one is not.

; CHECK: 4 loop-vectorize - Number of loops analyzed for vectorization
; CHECK: 2 loop-vectorize - Number of early exit loops vectorized
; CHECK: 1 loop-vectorize - Number of early exit loops vectorized
; CHECK: 3 loop-vectorize - Number of loops vectorized

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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