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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
define i1 @wrapping_add_unknown_1(i8 %a) {
; CHECK-LABEL: @wrapping_add_unknown_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SUB:%.*]] = add i8 [[A:%.*]], -1
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[SUB]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
entry:
%sub = add i8 %a, -1
%cmp = icmp eq i8 %sub, 0
ret i1 %cmp
}
define i1 @wrapping_add_known_1(i8 %a) {
; CHECK-LABEL: @wrapping_add_known_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[PRE:%.*]] = icmp eq i8 [[A:%.*]], 1
; CHECK-NEXT: br i1 [[PRE]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[SUB_1:%.*]] = add i8 [[A]], -1
; CHECK-NEXT: [[C_1:%.*]] = icmp eq i8 [[SUB_1]], 0
; CHECK-NEXT: ret i1 [[C_1]]
; CHECK: else:
; CHECK-NEXT: [[SUB_2:%.*]] = add i8 [[A]], -1
; CHECK-NEXT: [[C_2:%.*]] = icmp eq i8 [[SUB_2]], 0
; CHECK-NEXT: ret i1 [[C_2]]
;
entry:
%pre = icmp eq i8 %a, 1
br i1 %pre, label %then, label %else
then:
%sub.1 = add i8 %a, -1
%c.1 = icmp eq i8 %sub.1, 0
ret i1 %c.1
else:
%sub.2 = add i8 %a, -1
%c.2 = icmp eq i8 %sub.2, 0
ret i1 %c.2
}
define i1 @wrapping_add_unknown_2(i8 %a) {
; CHECK-LABEL: @wrapping_add_unknown_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[PRE:%.*]] = icmp eq i8 [[A:%.*]], 0
; CHECK-NEXT: br i1 [[PRE]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[SUB_1:%.*]] = add i8 [[A]], -1
; CHECK-NEXT: [[C_1:%.*]] = icmp eq i8 [[SUB_1]], 0
; CHECK-NEXT: ret i1 [[C_1]]
; CHECK: else:
; CHECK-NEXT: [[SUB_2:%.*]] = add i8 [[A]], -1
; CHECK-NEXT: [[C_2:%.*]] = icmp eq i8 [[SUB_2]], 0
; CHECK-NEXT: ret i1 [[C_2]]
;
entry:
%pre = icmp eq i8 %a, 0
br i1 %pre, label %then, label %else
then:
%sub.1 = add i8 %a, -1
%c.1 = icmp eq i8 %sub.1, 0
ret i1 %c.1
else:
%sub.2 = add i8 %a, -1
%c.2 = icmp eq i8 %sub.2, 0
ret i1 %c.2
}
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