; CHECK-NEXT: call i32 @llvm.cttz.i32(i32 %Value, i1 false)
; CHECK-NEXT: ret i32
}
+
+; CHECK-LABEL: @overflow_div_add(
+; CHECK: ret i1 false
+define i1 @overflow_div_add(i32 %v1, i32 %v2) nounwind {
+entry:
+ %div = sdiv i32 %v1, 2
+ %t = call %ov.result.32 @llvm.sadd.with.overflow.i32(i32 %div, i32 1)
+ %obit = extractvalue %ov.result.32 %t, 1
+ ret i1 %obit
+}
+
+; CHECK-LABEL: @overflow_div_sub(
+; CHECK: ret i1 false
+define i1 @overflow_div_sub(i32 %v1, i32 %v2) nounwind {
+entry:
+ ; Check cases where the known sign bits are larger than the word size.
+ %a = ashr i32 %v1, 18
+ %div = sdiv i32 %a, 65536
+ %t = call %ov.result.32 @llvm.ssub.with.overflow.i32(i32 %div, i32 1)
+ %obit = extractvalue %ov.result.32 %t, 1
+ ret i1 %obit
+}
+
+; CHECK-LABEL: @overflow_mod_mul(
+; CHECK: ret i1 false
+define i1 @overflow_mod_mul(i32 %v1, i32 %v2) nounwind {
+entry:
+ %rem = srem i32 %v1, 1000
+ %t = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %rem, i32 %rem)
+ %obit = extractvalue %ov.result.32 %t, 1
+ ret i1 %obit
+}
+
+; CHECK-LABEL: @overflow_mod_overflow_mul(
+; CHECK-NOT: ret i1 false
+define i1 @overflow_mod_overflow_mul(i32 %v1, i32 %v2) nounwind {
+entry:
+ %rem = srem i32 %v1, 65537
+ ; This may overflow because the result of the mul operands may be greater than 16bits
+ ; and the result greater than 32.
+ %t = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %rem, i32 %rem)
+ %obit = extractvalue %ov.result.32 %t, 1
+ ret i1 %obit
+}