+
+define i8 @test84(i32 %a) {
+ %add = add nsw i32 %a, -16777216
+ %shr = lshr exact i32 %add, 23
+ %trunc = trunc i32 %shr to i8
+ ret i8 %trunc
+
+; CHECK-LABEL: @test84(
+; CHECK: [[ADD:%.*]] = add i32 %a, 2130706432
+; CHECK: [[SHR:%.*]] = lshr exact i32 [[ADD]], 23
+; CHECK: [[CST:%.*]] = trunc i32 [[SHR]] to i8
+}
+
+define i8 @test85(i32 %a) {
+ %add = add nuw i32 %a, -16777216
+ %shr = lshr exact i32 %add, 23
+ %trunc = trunc i32 %shr to i8
+ ret i8 %trunc
+
+; CHECK-LABEL: @test85(
+; CHECK: [[ADD:%.*]] = add i32 %a, 2130706432
+; CHECK: [[SHR:%.*]] = lshr exact i32 [[ADD]], 23
+; CHECK: [[CST:%.*]] = trunc i32 [[SHR]] to i8
+}
+
+; Overflow on a float to int or int to float conversion is undefined (PR21130).
+
+define i8 @overflow_fptosi() {
+ %i = fptosi double 1.56e+02 to i8
+ ret i8 %i
+; CHECK-LABEL: @overflow_fptosi(
+; CHECK-NEXT: ret i8 undef
+}
+
+define i8 @overflow_fptoui() {
+ %i = fptoui double 2.56e+02 to i8
+ ret i8 %i
+; CHECK-LABEL: @overflow_fptoui(
+; CHECK-NEXT: ret i8 undef
+}
+
+; The maximum float is approximately 2 ** 128 which is 3.4E38.
+; The constant below is 4E38. Use a 130 bit integer to hold that
+; number; 129-bits for the value + 1 bit for the sign.
+define float @overflow_uitofp() {
+ %i = uitofp i130 400000000000000000000000000000000000000 to float
+ ret float %i
+; CHECK-LABEL: @overflow_uitofp(
+; CHECK-NEXT: ret float undef
+}
+
+define float @overflow_sitofp() {
+ %i = sitofp i130 400000000000000000000000000000000000000 to float
+ ret float %i
+; CHECK-LABEL: @overflow_sitofp(
+; CHECK-NEXT: ret float undef
+}
+
+define i32 @PR21388(i32* %v) {
+ %icmp = icmp slt i32* %v, null
+ %sext = sext i1 %icmp to i32
+ ret i32 %sext
+; CHECK-LABEL: @PR21388(
+; CHECK-NEXT: %[[icmp:.*]] = icmp slt i32* %v, null
+; CHECK-NEXT: %[[sext:.*]] = sext i1 %[[icmp]] to i32
+; CHECK-NEXT: ret i32 %[[sext]]
+}