--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -two-entry-phi-node-folding-threshold=4 -phi-node-folding-threshold=0 < %s | FileCheck %s
+
+declare void @sideeffect0()
+declare void @sideeffect1()
+
+define i32 @unknown(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unknown(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 0
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %end
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ 0, %entry ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @predictably_taken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @predictably_taken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 0, !prof [[PROF0:![0-9]+]]
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %end, !prof !0 ; likely branches to %cond.true
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ 0, %entry ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @predictably_nontaken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @predictably_nontaken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 0, i32 [[V0]], !prof [[PROF0]]
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %end, label %cond.true, !prof !0 ; likely branches to %end
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ 0, %entry ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @unpredictable(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unpredictable(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 0, !unpredictable !1
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %end, !unpredictable !1 ; unpredictable
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ 0, %entry ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @unpredictable_yet_taken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unpredictable_yet_taken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 0, !prof [[PROF0]], !unpredictable !1
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %end, !prof !0, !unpredictable !1 ; likely branches to %cond.true, yet unpredictable
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ 0, %entry ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @unpredictable_yet_nontaken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unpredictable_yet_nontaken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 0, i32 [[V0]], !prof [[PROF0]], !unpredictable !1
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %end, label %cond.true, !prof !0, !unpredictable !1 ; likely branches to %end, yet unpredictable
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ 0, %entry ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+!0 = !{!"branch_weights", i32 99, i32 1}
+!1 = !{}
+
+; CHECK: !0 = !{!"branch_weights", i32 99, i32 1}
+; CHECK: !1 = !{}
--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -two-entry-phi-node-folding-threshold=4 -phi-node-folding-threshold=0 < %s | FileCheck %s
+
+declare void @sideeffect0()
+declare void @sideeffect1()
+
+define i32 @unknown(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unknown(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[V1:%.*]] = sub i32 [[C]], [[D]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 [[V1]]
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %cond.false
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+cond.false:
+ %v1 = sub i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ %v1, %cond.false ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @predictably_taken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @predictably_taken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[V1:%.*]] = sub i32 [[C]], [[D]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 [[V1]], !prof [[PROF0:![0-9]+]]
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %cond.false, !prof !0 ; likely branches to %cond.true
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+cond.false:
+ %v1 = sub i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ %v1, %cond.false ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @predictably_nontaken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @predictably_nontaken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[V1:%.*]] = sub i32 [[C]], [[D]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V1]], i32 [[V0]], !prof [[PROF0]]
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.false, label %cond.true, !prof !0 ; likely branches to %cond.false
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+cond.false:
+ %v1 = sub i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ %v1, %cond.false ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @unpredictable(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unpredictable(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[V1:%.*]] = sub i32 [[C]], [[D]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 [[V1]], !unpredictable !1
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %cond.false, !unpredictable !1 ; unpredictable
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+cond.false:
+ %v1 = sub i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ %v1, %cond.false ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @unpredictable_yet_taken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unpredictable_yet_taken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[V1:%.*]] = sub i32 [[C]], [[D]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V0]], i32 [[V1]], !prof [[PROF0]], !unpredictable !1
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.true, label %cond.false, !prof !0, !unpredictable !1 ; likely branches to %cond.true, yet unpredictable
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+cond.false:
+ %v1 = sub i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ %v1, %cond.false ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+define i32 @unpredictable_yet_nontaken(i32 %a, i32 %b, i32 %c, i32 %d) {
+; CHECK-LABEL: @unpredictable_yet_nontaken(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @sideeffect0()
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[V0:%.*]] = add i32 [[C:%.*]], [[D:%.*]]
+; CHECK-NEXT: [[V1:%.*]] = sub i32 [[C]], [[D]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 [[V1]], i32 [[V0]], !prof [[PROF0]], !unpredictable !1
+; CHECK-NEXT: call void @sideeffect1()
+; CHECK-NEXT: ret i32 [[RES]]
+;
+entry:
+ call void @sideeffect0()
+ %cmp = icmp eq i32 %a, %b
+ br i1 %cmp, label %cond.false, label %cond.true, !prof !0, !unpredictable !1 ; likely branches to %cond.false, yet unpredictable
+
+cond.true:
+ %v0 = add i32 %c, %d
+ br label %end
+
+cond.false:
+ %v1 = sub i32 %c, %d
+ br label %end
+
+end:
+ %res = phi i32 [ %v0, %cond.true ], [ %v1, %cond.false ]
+ call void @sideeffect1()
+ ret i32 %res
+}
+
+!0 = !{!"branch_weights", i32 99, i32 1}
+!1 = !{}
+
+; CHECK: !0 = !{!"branch_weights", i32 99, i32 1}
+; CHECK: !1 = !{}