50 lines
2.1 KiB
LLVM
50 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -gvn -S | FileCheck %s
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; This test checks that we don't hang trying to split a critical edge in loadpre
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; when the control flow uses a callbr instruction.
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%struct.pluto = type <{ i8, i8 }>
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define void @widget(%struct.pluto** %tmp1) {
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; CHECK-LABEL: @widget(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: callbr void asm sideeffect "", "X,X"(i8* blockaddress(@widget, [[BB5:%.*]]), i8* blockaddress(@widget, [[BB8:%.*]]))
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; CHECK-NEXT: to label [[BB4:%.*]] [label [[BB5]], label %bb8]
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; CHECK: bb4:
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; CHECK-NEXT: br label [[BB5]]
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; CHECK: bb5:
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; CHECK-NEXT: [[TMP6:%.*]] = load %struct.pluto*, %struct.pluto** [[TMP1:%.*]]
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; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds [[STRUCT_PLUTO:%.*]], %struct.pluto* [[TMP6]], i64 0, i32 1
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; CHECK-NEXT: br label [[BB8]]
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; CHECK: bb8:
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; CHECK-NEXT: [[TMP9:%.*]] = phi i8* [ [[TMP7]], [[BB5]] ], [ null, [[BB:%.*]] ]
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; CHECK-NEXT: [[TMP10:%.*]] = load %struct.pluto*, %struct.pluto** [[TMP1]]
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; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds [[STRUCT_PLUTO]], %struct.pluto* [[TMP10]], i64 0, i32 0
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; CHECK-NEXT: [[TMP12:%.*]] = load i8, i8* [[TMP11]]
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; CHECK-NEXT: tail call void @spam(i8* [[TMP9]], i8 [[TMP12]])
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; CHECK-NEXT: ret void
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;
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bb:
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callbr void asm sideeffect "", "X,X"(i8* blockaddress(@widget, %bb5), i8* blockaddress(@widget, %bb8))
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to label %bb4 [label %bb5, label %bb8]
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bb4: ; preds = %bb
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br label %bb5
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bb5: ; preds = %bb4, %bb
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%tmp6 = load %struct.pluto*, %struct.pluto** %tmp1
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%tmp7 = getelementptr inbounds %struct.pluto, %struct.pluto* %tmp6, i64 0, i32 1
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br label %bb8
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bb8: ; preds = %bb5, %bb
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%tmp9 = phi i8* [ %tmp7, %bb5 ], [ null, %bb ]
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%tmp10 = load %struct.pluto*, %struct.pluto** %tmp1
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%tmp11 = getelementptr inbounds %struct.pluto, %struct.pluto* %tmp10, i64 0, i32 0
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%tmp12 = load i8, i8* %tmp11
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tail call void @spam(i8* %tmp9, i8 %tmp12)
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ret void
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}
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declare void @spam(i8*, i8)
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