; RUN: opt -jump-threading -S < %s | FileCheck %s
; RUN: opt -passes=jump-threading -S < %s | FileCheck %s
+
; Check the unreachable loop won't cause infinite loop
; in jump-threading when it tries to update the predecessors'
; profile metadata from a phi node.
define void @unreachable_single_bb_loop() {
-; CHECK-LABEL: @unreachable_single_bb_loop()
+; CHECK-LABEL: @unreachable_single_bb_loop(
bb:
%tmp = call i32 @a()
%tmp1 = icmp eq i32 %tmp, 1
bb2: ; preds = %bb2
%tmp4 = icmp ne i32 %tmp, 1
switch i1 %tmp4, label %bb2 [
- i1 0, label %bb5
- i1 1, label %bb8
+ i1 0, label %bb5
+ i1 1, label %bb8
]
bb5: ; preds = %bb2, %bb
}
define void @unreachable_multi_bbs_loop() {
-; CHECK-LABEL: @unreachable_multi_bbs_loop()
+; CHECK-LABEL: @unreachable_multi_bbs_loop(
bb:
%tmp = call i32 @a()
%tmp1 = icmp eq i32 %tmp, 1
bb2: ; preds = %bb3
%tmp4 = icmp ne i32 %tmp, 1
switch i1 %tmp4, label %bb3 [
- i1 0, label %bb5
- i1 1, label %bb8
+ i1 0, label %bb5
+ i1 1, label %bb8
]
bb5: ; preds = %bb2, %bb
}
declare i32 @a()
+; This gets into a state that could cause instruction simplify
+; to hang - an insertelement instruction has itself as an operand.
+
+define void @PR48362() {
+; CHECK-LABEL: @PR48362(
+cleanup1491: ; preds = %for.body1140
+ switch i32 0, label %cleanup2343.loopexit4 [
+ i32 0, label %cleanup.cont1500
+ i32 128, label %lbl_555.loopexit
+ ]
+
+cleanup.cont1500: ; preds = %cleanup1491
+ unreachable
+
+lbl_555.loopexit: ; preds = %cleanup1491
+ br label %for.body1509
+
+for.body1509: ; preds = %for.inc2340, %lbl_555.loopexit
+ %l_580.sroa.0.0 = phi <4 x i32> [ <i32 1684658741, i32 1684658741, i32 1684658741, i32 1684658741>, %lbl_555.loopexit ], [ %l_580.sroa.0.2, %for.inc2340 ]
+ %p_55.addr.10 = phi i16 [ 0, %lbl_555.loopexit ], [ %p_55.addr.11, %for.inc2340 ]
+ %i82 = load i32, i32* undef, align 1
+ %tobool1731.not = icmp eq i32 %i82, 0
+ br i1 %tobool1731.not, label %if.end1733, label %if.then1732
+
+if.then1732: ; preds = %for.body1509
+ br label %cleanup2329
+
+if.end1733: ; preds = %for.body1509
+ %tobool1735.not = icmp eq i16 %p_55.addr.10, 0
+ br i1 %tobool1735.not, label %if.then1736, label %if.else1904
+
+if.then1736: ; preds = %if.end1733
+ br label %cleanup2329
+
+if.else1904: ; preds = %if.end1733
+ br label %for.body1911
+
+for.body1911: ; preds = %if.else1904
+ %l_580.sroa.0.4.vec.extract683 = extractelement <4 x i32> %l_580.sroa.0.0, i32 2
+ %xor2107 = xor i32 undef, %l_580.sroa.0.4.vec.extract683
+ br label %land.end2173
+
+land.end2173: ; preds = %for.body1911
+ br i1 undef, label %if.end2178, label %cleanup2297
+
+if.end2178: ; preds = %land.end2173
+ %l_580.sroa.0.2.vec.insert = insertelement <4 x i32> %l_580.sroa.0.0, i32 undef, i32 1
+ br label %cleanup2297
+
+cleanup2297: ; preds = %if.end2178, %land.end2173
+ %l_580.sroa.0.1 = phi <4 x i32> [ %l_580.sroa.0.2.vec.insert, %if.end2178 ], [ %l_580.sroa.0.0, %land.end2173 ]
+ br label %cleanup2329
+
+cleanup2329: ; preds = %cleanup2297, %if.then1736, %if.then1732
+ %l_580.sroa.0.2 = phi <4 x i32> [ %l_580.sroa.0.0, %if.then1736 ], [ %l_580.sroa.0.1, %cleanup2297 ], [ %l_580.sroa.0.0, %if.then1732 ]
+ %cleanup.dest.slot.11 = phi i32 [ 0, %if.then1736 ], [ undef, %cleanup2297 ], [ 129, %if.then1732 ]
+ %p_55.addr.11 = phi i16 [ %p_55.addr.10, %if.then1736 ], [ undef, %cleanup2297 ], [ %p_55.addr.10, %if.then1732 ]
+ switch i32 %cleanup.dest.slot.11, label %cleanup2343.loopexit [
+ i32 0, label %cleanup.cont2339
+ i32 129, label %crit_edge114
+ ]
+
+cleanup.cont2339: ; preds = %cleanup2329
+ br label %for.inc2340
+
+for.inc2340: ; preds = %cleanup.cont2339
+ br i1 undef, label %for.body1509, label %crit_edge115
+
+crit_edge114: ; preds = %cleanup2329
+ unreachable
+
+crit_edge115: ; preds = %for.inc2340
+ unreachable
+
+cleanup2343.loopexit: ; preds = %cleanup2329
+ unreachable
+
+cleanup2343.loopexit4: ; preds = %cleanup1491
+ unreachable
+}
+
!0 = !{!"branch_weights", i32 2146410443, i32 1073205}