%r = and i1 %not_null, %no_underflow
ret i1 %r
}
+define i1 @t1_strict(i8 %base, i8 %offset) {
+; CHECK-LABEL: @t1_strict(
+; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
+; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
+; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
+; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
+; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
+; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
+; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %adjusted = sub i8 %base, %offset
+ call void @use8(i8 %adjusted)
+ %no_underflow = icmp ugt i8 %base, %offset ; same is valid for strict predicate
+ call void @use1(i1 %no_underflow)
+ %not_null = icmp ne i8 %adjusted, 0
+ call void @use1(i1 %not_null)
+ %r = and i1 %not_null, %no_underflow
+ ret i1 %r
+}
define i1 @t2(i8 %base, i8 %offset) {
; CHECK-LABEL: @t2(
;
%adjusted = sub i8 %base, %offset
call void @use8(i8 %adjusted)
- %no_underflow = icmp uge i8 %base, %offset ; swapped
+ %no_underflow = icmp uge i8 %base, %offset
call void @use1(i1 %no_underflow)
%not_null = icmp ne i8 %adjusted, 0
call void @use1(i1 %not_null)
;
%adjusted = sub i8 %base, %offset
call void @use8(i8 %adjusted)
- %underflow = icmp ugt i8 %adjusted, %base
+ %underflow = icmp ult i8 %base, %offset
+ call void @use1(i1 %underflow)
+ %null = icmp eq i8 %adjusted, 0
+ call void @use1(i1 %null)
+ %r = or i1 %null, %underflow
+ ret i1 %r
+}
+define i1 @t7_nonstrict(i8 %base, i8 %offset) {
+; CHECK-LABEL: @t7_nonstrict(
+; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
+; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
+; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]]
+; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
+; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
+; CHECK-NEXT: call void @use1(i1 [[NULL]])
+; CHECK-NEXT: [[R:%.*]] = or i1 [[NULL]], [[UNDERFLOW]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %adjusted = sub i8 %base, %offset
+ call void @use8(i8 %adjusted)
+ %underflow = icmp ule i8 %base, %offset ; same is valid for non-strict predicate
call void @use1(i1 %underflow)
%null = icmp eq i8 %adjusted, 0
call void @use1(i1 %null)
%r = or i1 %not_null, %no_underflow
ret i1 %r
}
+define i1 @t10_strict_bad(i8 %base, i8 %offset) {
+; CHECK-LABEL: @t10_strict_bad(
+; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
+; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
+; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
+; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
+; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
+; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
+; CHECK-NEXT: [[R:%.*]] = or i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %adjusted = sub i8 %base, %offset
+ call void @use8(i8 %adjusted)
+ %no_underflow = icmp ugt i8 %base, %offset ; but not for non-strict predicate
+ call void @use1(i1 %no_underflow)
+ %not_null = icmp ne i8 %adjusted, 0
+ call void @use1(i1 %not_null)
+ %r = or i1 %not_null, %no_underflow
+ ret i1 %r
+}
define i1 @t11(i8 %base, i8 %offset) {
; CHECK-LABEL: @t11(
%r = and i1 %null, %underflow
ret i1 %r
}
+define i1 @t12_nonstrict_bad(i8 %base, i8 %offset) {
+; CHECK-LABEL: @t12_nonstrict_bad(
+; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
+; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
+; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp uge i8 [[ADJUSTED]], [[BASE]]
+; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
+; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
+; CHECK-NEXT: call void @use1(i1 [[NULL]])
+; CHECK-NEXT: [[R:%.*]] = and i1 [[NULL]], [[UNDERFLOW]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %adjusted = sub i8 %base, %offset
+ call void @use8(i8 %adjusted)
+ %underflow = icmp uge i8 %adjusted, %base ; but not for non-strict predicate
+ call void @use1(i1 %underflow)
+ %null = icmp eq i8 %adjusted, 0
+ call void @use1(i1 %null)
+ %r = and i1 %null, %underflow
+ ret i1 %r
+}
define i1 @t13(i8 %base, i8 %offset) {
; CHECK-LABEL: @t13(