--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -jump-threading -S < %s | FileCheck %s
+
+declare i32 @f1()
+declare i32 @f2()
+declare void @f3()
+
+; trunc(and) should be simplified
+define i32 @test(i1 %cond0) {
+; CHECK-LABEL: @test(
+; CHECK-NEXT: br i1 [[COND0:%.*]], label [[T1:%.*]], label [[F1:%.*]]
+; CHECK: T1:
+; CHECK-NEXT: [[V1:%.*]] = call i32 @f1()
+; CHECK-NEXT: br label [[MERGE:%.*]]
+; CHECK: F1:
+; CHECK-NEXT: [[V2:%.*]] = call i32 @f2()
+; CHECK-NEXT: br label [[MERGE]]
+; CHECK: Merge:
+; CHECK-NEXT: [[A:%.*]] = phi i32 [ 10, [[T1]] ], [ 0, [[F1]] ]
+; CHECK-NEXT: [[B:%.*]] = phi i32 [ [[V1]], [[T1]] ], [ [[V2]], [[F1]] ]
+; CHECK-NEXT: [[AND:%.*]] = and i32 [[A]], 1
+; CHECK-NEXT: [[COND:%.*]] = trunc i32 [[AND]] to i1
+; CHECK-NEXT: br i1 [[COND]], label [[T2:%.*]], label [[F2:%.*]]
+; CHECK: T2:
+; CHECK-NEXT: call void @f3()
+; CHECK-NEXT: ret i32 [[B]]
+; CHECK: F2:
+; CHECK-NEXT: ret i32 [[B]]
+;
+ br i1 %cond0, label %T1, label %F1
+T1:
+ %v1 = call i32 @f1()
+ br label %Merge
+
+F1:
+ %v2 = call i32 @f2()
+ br label %Merge
+
+Merge:
+ %A = phi i32 [10, %T1], [0, %F1]
+ %B = phi i32 [%v1, %T1], [%v2, %F1]
+ %And = and i32 %A, 1
+ %cond = trunc i32 %And to i1
+ br i1 %cond, label %T2, label %F2
+
+T2:
+ call void @f3()
+ ret i32 %B
+
+F2:
+ ret i32 %B
+}
+
+; trunc(select) should be simplified
+define i32 @test2(i1 %cond0) {
+; CHECK-LABEL: @test2(
+; CHECK-NEXT: br i1 [[COND0:%.*]], label [[T1:%.*]], label [[F1:%.*]]
+; CHECK: T1:
+; CHECK-NEXT: [[V1:%.*]] = call i32 @f1()
+; CHECK-NEXT: br label [[MERGE:%.*]]
+; CHECK: F1:
+; CHECK-NEXT: [[V2:%.*]] = call i32 @f2()
+; CHECK-NEXT: br label [[MERGE]]
+; CHECK: Merge:
+; CHECK-NEXT: [[A:%.*]] = phi i1 [ true, [[T1]] ], [ false, [[F1]] ]
+; CHECK-NEXT: [[B:%.*]] = phi i32 [ [[V1]], [[T1]] ], [ [[V2]], [[F1]] ]
+; CHECK-NEXT: [[A2:%.*]] = xor i1 [[A]], true
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[A2]], i32 10, i32 0
+; CHECK-NEXT: [[COND:%.*]] = trunc i32 [[SEL]] to i1
+; CHECK-NEXT: br i1 [[COND]], label [[T2:%.*]], label [[F2:%.*]]
+; CHECK: T2:
+; CHECK-NEXT: call void @f3()
+; CHECK-NEXT: ret i32 [[B]]
+; CHECK: F2:
+; CHECK-NEXT: ret i32 [[B]]
+;
+ br i1 %cond0, label %T1, label %F1
+T1:
+ %v1 = call i32 @f1()
+ br label %Merge
+
+F1:
+ %v2 = call i32 @f2()
+ br label %Merge
+
+Merge:
+ %A = phi i1 [1, %T1], [0, %F1]
+ %B = phi i32 [%v1, %T1], [%v2, %F1]
+ %A2 = xor i1 %A, 1
+ %sel = select i1 %A2, i32 10, i32 0
+ %cond = trunc i32 %sel to i1
+ br i1 %cond, label %T2, label %F2
+
+T2:
+ call void @f3()
+ ret i32 %B
+
+F2:
+ ret i32 %B
+}
+