192 lines
7.6 KiB
LLVM
192 lines
7.6 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -instcombine -instcombine-infinite-loop-threshold=2 < %s | FileCheck %s
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; This used to cause on infinite instcombine loop.
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define void @test(i1 %c) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: bb16:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[BB17:%.*]], label [[BB24:%.*]]
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; CHECK: bb17:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i8* [ [[TMP1:%.*]], [[BB47:%.*]] ], [ undef, [[BB16:%.*]] ]
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; CHECK-NEXT: store i8* [[TMP0]], i8** undef, align 8
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; CHECK-NEXT: ret void
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; CHECK: bb24:
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; CHECK-NEXT: br i1 [[C]], label [[BB44:%.*]], label [[BB49:%.*]]
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; CHECK: bb44:
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; CHECK-NEXT: [[TMP467:%.*]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb47:
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; CHECK-NEXT: [[TMP1]] = phi i8* [ [[TMP2:%.*]], [[BB150:%.*]] ], [ [[TMP1221:%.*]], [[BB119:%.*]] ], [ [[TMP1032:%.*]], [[BB101:%.*]] ], [ [[TMP933:%.*]], [[BB91:%.*]] ], [ [[TMP834:%.*]], [[BB81:%.*]] ], [ [[TMP705:%.*]], [[BB67:%.*]] ], [ [[TMP586:%.*]], [[BB56:%.*]] ], [ [[TMP467]], [[BB44]] ]
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; CHECK-NEXT: br label [[BB17]]
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; CHECK: bb49:
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; CHECK-NEXT: br i1 [[C]], label [[BB56]], label [[BB59:%.*]]
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; CHECK: bb56:
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; CHECK-NEXT: [[TMP586]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb59:
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; CHECK-NEXT: br i1 [[C]], label [[BB67]], label [[BB71:%.*]]
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; CHECK: bb67:
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; CHECK-NEXT: [[TMP705]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb71:
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; CHECK-NEXT: br i1 [[C]], label [[BB81]], label [[BB84:%.*]]
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; CHECK: bb81:
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; CHECK-NEXT: [[TMP834]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb84:
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; CHECK-NEXT: br i1 [[C]], label [[BB91]], label [[BB94:%.*]]
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; CHECK: bb91:
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; CHECK-NEXT: [[TMP933]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb94:
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; CHECK-NEXT: br i1 [[C]], label [[BB101]], label [[BB104:%.*]]
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; CHECK: bb101:
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; CHECK-NEXT: [[TMP1032]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb104:
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; CHECK-NEXT: br i1 [[C]], label [[BB119]], label [[BB123:%.*]]
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; CHECK: bb119:
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; CHECK-NEXT: [[TMP1221]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb123:
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; CHECK-NEXT: br i1 [[C]], label [[BB147:%.*]], label [[BB152:%.*]]
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; CHECK: bb147:
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; CHECK-NEXT: [[TMP1499:%.*]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: br label [[BB150]]
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; CHECK: bb150:
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; CHECK-NEXT: [[TMP2]] = phi i8* [ [[TMP1848:%.*]], [[BB152]] ], [ [[TMP1499]], [[BB147]] ]
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; CHECK-NEXT: br label [[BB47]]
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; CHECK: bb152:
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; CHECK-NEXT: [[TMP1848]] = load i8*, i8** inttoptr (i64 16 to i8**), align 16
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; CHECK-NEXT: store i1 true, i1* undef, align 1
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; CHECK-NEXT: br label [[BB150]]
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;
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bb16: ; preds = %bb
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br i1 %c, label %bb17, label %bb24
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bb17: ; preds = %bb47, %bb17
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%0 = phi i8* [ %1, %bb47 ], [ undef, %bb16 ]
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store i8* %0, i8** undef, align 8
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ret void
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bb24: ; preds = %bb24
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br i1 %c, label %bb44, label %bb49
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bb44: ; preds = %bb43
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%tmp46 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb47: ; preds = %bb150, %bb119, %bb101, %bb91, %bb81, %bb67, %bb56, %bb44
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%.in1 = phi i64* [ %.in, %bb150 ], [ %tmp122, %bb119 ], [ %tmp103, %bb101 ], [ %tmp93, %bb91 ], [ %tmp83, %bb81 ], [ %tmp70, %bb67 ], [ %tmp58, %bb56 ], [ %tmp46, %bb44 ]
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%1 = bitcast i64* %.in1 to i8*
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br label %bb17
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bb49: ; preds = %bb49
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br i1 %c, label %bb56, label %bb59
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bb56: ; preds = %bb55
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%tmp58 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb59: ; preds = %bb59
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br i1 %c, label %bb67, label %bb71
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bb67: ; preds = %bb66
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%tmp70 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb71: ; preds = %bb71
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br i1 %c, label %bb81, label %bb84
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bb81: ; preds = %bb80
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%tmp83 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb84: ; preds = %bb84
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br i1 %c, label %bb91, label %bb94
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bb91: ; preds = %bb90
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%tmp93 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb94: ; preds = %bb94
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br i1 %c, label %bb101, label %bb104
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bb101: ; preds = %bb100
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%tmp103 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb104: ; preds = %bb104
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br i1 %c, label %bb119, label %bb123
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bb119: ; preds = %bb118
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%tmp122 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb47
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bb123: ; preds = %bb123
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br i1 %c, label %bb147, label %bb152
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bb147: ; preds = %bb146
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%tmp149 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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br label %bb150
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bb150: ; preds = %bb152, %bb147
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%.in = phi i64* [ %tmp184, %bb152 ], [ %tmp149, %bb147 ]
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br label %bb47
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bb152: ; preds = %bb146
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%tmp184 = load i64*, i64** inttoptr (i64 16 to i64**), align 16
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call void undef()
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br label %bb150
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}
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; This used to cause an instcombine loop when the problem above was
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; addressed in a non-robust fashion.
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%type_1 = type {}
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%type_2 = type {}
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%type_3 = type {}
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define void @test_2(i1 %c) local_unnamed_addr {
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; CHECK-LABEL: @test_2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[WHILE_COND:%.*]]
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; CHECK: while.cond:
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; CHECK-NEXT: br label [[FOR_COND:%.*]]
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; CHECK: for.cond:
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; CHECK-NEXT: br i1 [[C:%.*]], label [[COND_TRUE133:%.*]], label [[COND_FALSE138:%.*]]
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; CHECK: cond.true133:
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; CHECK-NEXT: br label [[COND_END144:%.*]]
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; CHECK: cond.false138:
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; CHECK-NEXT: store %type_2* undef, %type_2** null, align 536870912
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; CHECK-NEXT: br label [[COND_END144]]
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; CHECK: cond.end144:
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; CHECK-NEXT: br label [[WHILE_COND]]
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;
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entry:
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br label %while.cond
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while.cond: ; preds = %cond.end144, %entry
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%link.0 = phi %type_2* [ undef, %entry ], [ %cond145, %cond.end144 ]
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%os115 = bitcast %type_2* %link.0 to %type_3*
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%ou116 = getelementptr inbounds %type_3, %type_3* %os115, i32 0
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%os1117 = bitcast %type_3* %ou116 to %type_1*
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br label %for.cond
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for.cond: ; preds = %while.cond
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br i1 %c, label %cond.true133, label %cond.false138
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cond.true133: ; preds = %sw.epilog
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%0 = load %type_2*, %type_2** undef, align 8
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br label %cond.end144
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cond.false138: ; preds = %sw.epilog
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%1 = load %type_2*, %type_2** undef, align 8
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br label %cond.end144
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cond.end144: ; preds = %cond.false138, %cond.true133
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%cond145 = phi %type_2* [ %0, %cond.true133 ], [ %1, %cond.false138 ]
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br label %while.cond
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}
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