; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S -passes=instcombine < %s | FileCheck %s ; This used to cause on infinite instcombine loop. define void @test(i1 %c, ptr %p) { ; CHECK-LABEL: @test( ; CHECK-NEXT: bb16: ; CHECK-NEXT: br i1 [[C:%.*]], label [[BB17:%.*]], label [[BB24:%.*]] ; CHECK: bb17: ; CHECK-NEXT: [[I:%.*]] = phi ptr [ [[DOTIN1:%.*]], [[BB47:%.*]] ], [ undef, [[BB16:%.*]] ] ; CHECK-NEXT: store ptr [[I]], ptr [[P:%.*]], align 8 ; CHECK-NEXT: ret void ; CHECK: bb24: ; CHECK-NEXT: br i1 [[C]], label [[BB44:%.*]], label [[BB49:%.*]] ; CHECK: bb44: ; CHECK-NEXT: [[TMP46:%.*]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb47: ; CHECK-NEXT: [[DOTIN1]] = phi ptr [ [[DOTIN:%.*]], [[BB150:%.*]] ], [ [[TMP122:%.*]], [[BB119:%.*]] ], [ [[TMP103:%.*]], [[BB101:%.*]] ], [ [[TMP93:%.*]], [[BB91:%.*]] ], [ [[TMP83:%.*]], [[BB81:%.*]] ], [ [[TMP70:%.*]], [[BB67:%.*]] ], [ [[TMP58:%.*]], [[BB56:%.*]] ], [ [[TMP46]], [[BB44]] ] ; CHECK-NEXT: br label [[BB17]] ; CHECK: bb49: ; CHECK-NEXT: br i1 [[C]], label [[BB56]], label [[BB59:%.*]] ; CHECK: bb56: ; CHECK-NEXT: [[TMP58]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb59: ; CHECK-NEXT: br i1 [[C]], label [[BB67]], label [[BB71:%.*]] ; CHECK: bb67: ; CHECK-NEXT: [[TMP70]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb71: ; CHECK-NEXT: br i1 [[C]], label [[BB81]], label [[BB84:%.*]] ; CHECK: bb81: ; CHECK-NEXT: [[TMP83]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb84: ; CHECK-NEXT: br i1 [[C]], label [[BB91]], label [[BB94:%.*]] ; CHECK: bb91: ; CHECK-NEXT: [[TMP93]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb94: ; CHECK-NEXT: br i1 [[C]], label [[BB101]], label [[BB104:%.*]] ; CHECK: bb101: ; CHECK-NEXT: [[TMP103]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb104: ; CHECK-NEXT: br i1 [[C]], label [[BB119]], label [[BB123:%.*]] ; CHECK: bb119: ; CHECK-NEXT: [[TMP122]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb123: ; CHECK-NEXT: br i1 [[C]], label [[BB147:%.*]], label [[BB152:%.*]] ; CHECK: bb147: ; CHECK-NEXT: [[TMP149:%.*]] = load ptr, ptr inttoptr (i64 16 to ptr), align 16 ; CHECK-NEXT: br label [[BB150]] ; CHECK: bb150: ; CHECK-NEXT: [[DOTIN]] = phi ptr [ poison, [[BB152]] ], [ [[TMP149]], [[BB147]] ] ; CHECK-NEXT: br label [[BB47]] ; CHECK: bb152: ; CHECK-NEXT: store i1 true, ptr poison, align 1 ; CHECK-NEXT: br label [[BB150]] ; bb16: br i1 %c, label %bb17, label %bb24 bb17: ; preds = %bb47, %bb16 %i = phi ptr [ %.in1, %bb47 ], [ undef, %bb16 ] store ptr %i, ptr %p, align 8 ret void bb24: ; preds = %bb16 br i1 %c, label %bb44, label %bb49 bb44: ; preds = %bb24 %tmp46 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb47: ; preds = %bb150, %bb119, %bb101, %bb91, %bb81, %bb67, %bb56, %bb44 %.in1 = phi ptr [ %.in, %bb150 ], [ %tmp122, %bb119 ], [ %tmp103, %bb101 ], [ %tmp93, %bb91 ], [ %tmp83, %bb81 ], [ %tmp70, %bb67 ], [ %tmp58, %bb56 ], [ %tmp46, %bb44 ] br label %bb17 bb49: ; preds = %bb24 br i1 %c, label %bb56, label %bb59 bb56: ; preds = %bb49 %tmp58 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb59: ; preds = %bb49 br i1 %c, label %bb67, label %bb71 bb67: ; preds = %bb59 %tmp70 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb71: ; preds = %bb59 br i1 %c, label %bb81, label %bb84 bb81: ; preds = %bb71 %tmp83 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb84: ; preds = %bb71 br i1 %c, label %bb91, label %bb94 bb91: ; preds = %bb84 %tmp93 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb94: ; preds = %bb84 br i1 %c, label %bb101, label %bb104 bb101: ; preds = %bb94 %tmp103 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb104: ; preds = %bb94 br i1 %c, label %bb119, label %bb123 bb119: ; preds = %bb104 %tmp122 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb47 bb123: ; preds = %bb104 br i1 %c, label %bb147, label %bb152 bb147: ; preds = %bb123 %tmp149 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 br label %bb150 bb150: ; preds = %bb152, %bb147 %.in = phi ptr [ %tmp184, %bb152 ], [ %tmp149, %bb147 ] br label %bb47 bb152: ; preds = %bb123 %tmp184 = load ptr, ptr inttoptr (i64 16 to ptr), align 16 call void undef() br label %bb150 } ; This used to cause an instcombine loop when the problem above was ; addressed in a non-robust fashion. %type_1 = type {} %type_2 = type {} %type_3 = type {} define void @test_2(i1 %c) local_unnamed_addr { ; CHECK-LABEL: @test_2( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[WHILE_COND:%.*]] ; CHECK: while.cond: ; CHECK-NEXT: br label [[FOR_COND:%.*]] ; CHECK: for.cond: ; CHECK-NEXT: br i1 [[C:%.*]], label [[COND_TRUE133:%.*]], label [[COND_FALSE138:%.*]] ; CHECK: cond.true133: ; CHECK-NEXT: br label [[COND_END144:%.*]] ; CHECK: cond.false138: ; CHECK-NEXT: br label [[COND_END144]] ; CHECK: cond.end144: ; CHECK-NEXT: store i1 true, ptr poison, align 1 ; CHECK-NEXT: br label [[WHILE_COND]] ; entry: br label %while.cond while.cond: ; preds = %cond.end144, %entry %link.0 = phi ptr [ undef, %entry ], [ %cond145, %cond.end144 ] br label %for.cond for.cond: ; preds = %while.cond br i1 %c, label %cond.true133, label %cond.false138 cond.true133: ; preds = %for.cond %i = load ptr, ptr undef, align 8 br label %cond.end144 cond.false138: ; preds = %for.cond %i1 = load ptr, ptr undef, align 8 br label %cond.end144 cond.end144: ; preds = %cond.false138, %cond.true133 %cond145 = phi ptr [ %i, %cond.true133 ], [ %i1, %cond.false138 ] br label %while.cond }