derek.holloway
7502bf64a4
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54 lines
2.1 KiB
LLVM
54 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; Check that no freeze instruction gets inserted before landingpad in a basic block
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i32 @propagate_freeze_in_landingpad() personality ptr null {
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; CHECK-LABEL: @propagate_freeze_in_landingpad(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[INVOKE_BB1:%.*]]
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; CHECK: invoke.bb1:
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; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[NORMAL_RETURN:%.*]] ]
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; CHECK-NEXT: [[RES0:%.*]] = invoke i32 @foo()
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; CHECK-NEXT: to label [[INVOKE_BB2:%.*]] unwind label [[EXCEPTIONAL_RETURN:%.*]]
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; CHECK: invoke.bb2:
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; CHECK-NEXT: [[RES1:%.*]] = invoke i32 @foo()
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; CHECK-NEXT: to label [[NORMAL_RETURN]] unwind label [[EXCEPTIONAL_RETURN]]
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; CHECK: normal_return:
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; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[X]], 1
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; CHECK-NEXT: br label [[INVOKE_BB1]]
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; CHECK: exceptional_return:
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; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ [[X]], [[INVOKE_BB1]] ], [ 0, [[INVOKE_BB2]] ]
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; CHECK-NEXT: [[LANDING_PAD:%.*]] = landingpad { ptr, i32 }
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: [[FR:%.*]] = freeze i32 [[PHI]]
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; CHECK-NEXT: [[RES:%.*]] = shl i32 [[FR]], 1
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; CHECK-NEXT: ret i32 [[RES]]
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;
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entry:
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br label %invoke.bb1
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invoke.bb1: ; preds = %normal_return, %entry
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%x = phi i32 [ 0, %entry ], [ %inc, %normal_return ]
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%res0 = invoke i32 @foo()
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to label %invoke.bb2 unwind label %exceptional_return
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invoke.bb2: ; preds = %invoke.bb1
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%res1 = invoke i32 @foo()
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to label %normal_return unwind label %exceptional_return
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normal_return: ; preds = %invoke.bb2
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%inc = add nuw nsw i32 %x, 1
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br label %invoke.bb1
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exceptional_return: ; preds = %invoke.bb2, %invoke.bb1
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%phi = phi i32 [ %x, %invoke.bb1 ], [ 0, %invoke.bb2 ]
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%landing_pad = landingpad { ptr, i32 }
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cleanup
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%fr = freeze i32 %phi
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%res = add i32 %fr, %phi
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ret i32 %res
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}
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declare i32 @foo()
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