a0b9117454
This commit modifies `LoopDeletion::deleteLoopIfDead` to check if the exit block of a loop is an EH pad before checking if the loop gets executed. This handles the case where an unreachable loop has a landingpad as an Exit block, and the loop gets deleted, leaving leaving the landingpad without an edge from an unwind clause. Fixes #76852.
38 lines
1.2 KiB
LLVM
38 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt %s -passes=loop-deletion -S | FileCheck %s
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define void @wombat() personality ptr null {
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; CHECK-LABEL: define void @wombat() personality ptr null {
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; CHECK-NEXT: bb:
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; CHECK-NEXT: br i1 false, label [[BB1:%.*]], label [[BB4:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: br label [[BB2:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: [[INVOKE:%.*]] = invoke double null()
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; CHECK-NEXT: to label [[BB2]] unwind label [[BB3:%.*]]
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; CHECK: bb3:
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; CHECK-NEXT: [[LANDINGPAD:%.*]] = landingpad { ptr, i32 }
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: ret void
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; CHECK: bb4:
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; CHECK-NEXT: ret void
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;
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bb:
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br i1 false, label %bb1, label %bb4
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bb1: ; preds = %bb
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br label %bb2
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bb2: ; preds = %bb1, %bb2
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%invoke = invoke double null()
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to label %bb2 unwind label %bb3
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bb3: ; preds = %bb2
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%landingpad = landingpad { ptr, i32 }
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cleanup
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ret void
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bb4: ; preds = %bb
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ret void
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}
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