46 lines
1.8 KiB
LLVM
46 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --prefix-filecheck-ir-name abc
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; RUN: opt -passes=dse -S < %s | FileCheck %s
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; Make sure invokes are not removed as dead stores.
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define void @test_nounwind_invoke() personality ptr @__gxx_personality_v0 {
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; CHECK-LABEL: @test_nounwind_invoke(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP:%.*]] = alloca i32, align 4
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; CHECK-NEXT: invoke void @foo(ptr [[TMP]])
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; CHECK-NEXT: to label [[BB1:%.*]] unwind label [[BB2:%.*]]
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; CHECK: bb1:
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr [[TMP]])
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; CHECK-NEXT: ret void
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; CHECK: bb2:
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; CHECK-NEXT: [[ABCTMP1:%.*]] = landingpad { ptr, i32 }
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: resume { ptr, i32 } [[ABCTMP1]]
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;
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bb:
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%tmp = alloca i32, align 4
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; 'foo' is 'argmemonly', meaning it can only write to memory pointed by %tmp.
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; And this def is killed by 'call @llvm.lifetime.end.p0' in bb1 without
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; being used elsewhere, becoming a dead store. But we shouldn't remove this
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; because invokes are terminators and thus cannot be removed.
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invoke void @foo(ptr %tmp)
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to label %bb1 unwind label %bb2
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bb1: ; preds = %bb
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call void @llvm.lifetime.end.p0(i64 4, ptr %tmp)
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ret void
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bb2: ; preds = %bb
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%tmp1 = landingpad { ptr, i32 }
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cleanup
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resume { ptr, i32 } %tmp1
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}
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; Function Attrs: argmemonly nocallback nofree nosync nounwind willreturn
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declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0
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; Function Attrs: argmemonly nounwind willreturn
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declare void @foo(ptr) #1
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declare i32 @__gxx_personality_v0(...)
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attributes #0 = { argmemonly nocallback nofree nosync nounwind willreturn }
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attributes #1 = { argmemonly nounwind willreturn }
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