--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -constraint-elimination -S %s | FileCheck %s
+
+define i1 @test_eq_1(i8 %a, i8 %b) {
+; CHECK-LABEL: @test_eq_1(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[T_1:%.*]] = icmp uge i8 [[A]], [[B]]
+; CHECK-NEXT: [[T_2:%.*]] = icmp ule i8 [[A]], [[B]]
+; CHECK-NEXT: [[RES_1:%.*]] = xor i1 [[T_1]], [[T_2]]
+; CHECK-NEXT: [[T_3:%.*]] = icmp eq i8 [[A]], [[B]]
+; CHECK-NEXT: [[RES_2:%.*]] = xor i1 [[RES_1]], [[T_3]]
+; CHECK-NEXT: [[T_4:%.*]] = icmp eq i8 [[B]], [[A]]
+; CHECK-NEXT: [[RES_3:%.*]] = xor i1 [[RES_2]], [[T_4]]
+; CHECK-NEXT: [[F_1:%.*]] = icmp ugt i8 [[B]], [[A]]
+; CHECK-NEXT: [[RES_4:%.*]] = xor i1 [[RES_3]], [[F_1]]
+; CHECK-NEXT: [[F_2:%.*]] = icmp ult i8 [[B]], [[A]]
+; CHECK-NEXT: [[RES_5:%.*]] = xor i1 [[RES_4]], [[F_2]]
+; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[B]], 99
+; CHECK-NEXT: [[RES_6:%.*]] = xor i1 [[RES_5]], [[C_1]]
+; CHECK-NEXT: ret i1 [[RES_6]]
+; CHECK: else:
+; CHECK-NEXT: [[F_3:%.*]] = icmp eq i8 [[A]], [[B]]
+; CHECK-NEXT: [[F_4:%.*]] = icmp eq i8 [[B]], [[A]]
+; CHECK-NEXT: [[RES_7:%.*]] = xor i1 [[F_3]], [[F_4]]
+; CHECK-NEXT: [[C_2:%.*]] = icmp ult i8 [[B]], 99
+; CHECK-NEXT: [[RES_8:%.*]] = xor i1 [[RES_7]], [[C_2]]
+; CHECK-NEXT: [[C_3:%.*]] = icmp uge i8 [[A]], [[B]]
+; CHECK-NEXT: [[RES_9:%.*]] = xor i1 [[RES_8]], [[C_3]]
+; CHECK-NEXT: [[C_4:%.*]] = icmp ule i8 [[A]], [[B]]
+; CHECK-NEXT: [[RES_10:%.*]] = xor i1 [[RES_9]], [[C_4]]
+; CHECK-NEXT: [[C_5:%.*]] = icmp ugt i8 [[B]], [[A]]
+; CHECK-NEXT: [[RES_11:%.*]] = xor i1 [[RES_10]], [[C_5]]
+; CHECK-NEXT: [[C_6:%.*]] = icmp ult i8 [[B]], [[A]]
+; CHECK-NEXT: [[RES_12:%.*]] = xor i1 [[RES_11]], [[C_6]]
+; CHECK-NEXT: ret i1 [[RES_12]]
+;
+entry:
+ %cmp = icmp eq i8 %a, %b
+ br i1 %cmp, label %then, label %else
+
+then:
+ %t.1 = icmp uge i8 %a, %b
+ %t.2 = icmp ule i8 %a, %b
+ %res.1 = xor i1 %t.1, %t.2
+
+ %t.3 = icmp eq i8 %a, %b
+ %res.2 = xor i1 %res.1, %t.3
+
+ %t.4 = icmp eq i8 %b, %a
+ %res.3 = xor i1 %res.2, %t.4
+
+ %f.1 = icmp ugt i8 %b, %a
+ %res.4 = xor i1 %res.3, %f.1
+
+ %f.2 = icmp ult i8 %b, %a
+ %res.5 = xor i1 %res.4, %f.2
+
+ %c.1 = icmp ult i8 %b, 99
+ %res.6 = xor i1 %res.5, %c.1
+ ret i1 %res.6
+
+else:
+ %f.3 = icmp eq i8 %a, %b
+ %f.4 = icmp eq i8 %b, %a
+ %res.7 = xor i1 %f.3, %f.4
+
+ %c.2 = icmp ult i8 %b, 99
+ %res.8 = xor i1 %res.7, %c.2
+
+ %c.3 = icmp uge i8 %a, %b
+ %res.9 = xor i1 %res.8, %c.3
+
+ %c.4 = icmp ule i8 %a, %b
+ %res.10 = xor i1 %res.9, %c.4
+
+ %c.5 = icmp ugt i8 %b, %a
+ %res.11 = xor i1 %res.10, %c.5
+
+ %c.6 = icmp ult i8 %b, %a
+ %res.12 = xor i1 %res.11, %c.6
+ ret i1 %res.12
+}
+
+define i1 @test_eq_2(i8 %a, i8 %b) {
+; CHECK-LABEL: @test_eq_2(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[PRE_1:%.*]] = icmp eq i8 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: br i1 [[PRE_1]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[PRE_3:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: br i1 [[PRE_3]], label [[THEN_THEN:%.*]], label [[THEN_ELSE:%.*]]
+; CHECK: then.then:
+; CHECK-NEXT: [[T_1:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: [[T_2:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[XOR_1:%.*]] = xor i1 [[T_1]], true
+; CHECK-NEXT: [[F_1:%.*]] = icmp uge i8 [[A]], 100
+; CHECK-NEXT: [[XOR_2:%.*]] = xor i1 [[XOR_1]], [[F_1]]
+; CHECK-NEXT: [[F_2:%.*]] = icmp uge i8 [[B]], 100
+; CHECK-NEXT: [[XOR_3:%.*]] = xor i1 [[XOR_2]], false
+; CHECK-NEXT: [[F_3_1:%.*]] = icmp ugt i8 [[A]], 99
+; CHECK-NEXT: [[XOR_4:%.*]] = xor i1 [[XOR_3]], [[F_3_1]]
+; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[A]], 99
+; CHECK-NEXT: [[XOR_5:%.*]] = xor i1 [[XOR_4]], [[C_1]]
+; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i8 [[A]], 98
+; CHECK-NEXT: [[XOR_6:%.*]] = xor i1 [[XOR_5]], [[C_1]]
+; CHECK-NEXT: ret i1 [[XOR_6]]
+; CHECK: then.else:
+; CHECK-NEXT: [[F_4:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: [[F_5:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[XOR_7:%.*]] = xor i1 [[F_4]], false
+; CHECK-NEXT: [[T_3:%.*]] = icmp uge i8 [[A]], 100
+; CHECK-NEXT: [[XOR_8:%.*]] = xor i1 [[XOR_7]], [[T_3]]
+; CHECK-NEXT: [[T_4:%.*]] = icmp uge i8 [[B]], 100
+; CHECK-NEXT: [[XOR_9:%.*]] = xor i1 [[XOR_8]], true
+; CHECK-NEXT: [[T_5:%.*]] = icmp ugt i8 [[A]], 99
+; CHECK-NEXT: [[XOR_10:%.*]] = xor i1 [[XOR_9]], [[T_5]]
+; CHECK-NEXT: [[C_3:%.*]] = icmp ult i8 [[A]], 99
+; CHECK-NEXT: [[XOR_11:%.*]] = xor i1 [[XOR_10]], [[C_3]]
+; CHECK-NEXT: [[C_4:%.*]] = icmp ugt i8 [[A]], 98
+; CHECK-NEXT: [[XOR_12:%.*]] = xor i1 [[XOR_11]], [[C_4]]
+; CHECK-NEXT: ret i1 [[XOR_12]]
+; CHECK: else:
+; CHECK-NEXT: [[CMP_2:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: ret i1 [[CMP_2]]
+;
+entry:
+ %pre.1 = icmp eq i8 %a, %b
+ br i1 %pre.1, label %then, label %else
+
+then:
+ %pre.3 = icmp ult i8 %b, 100
+ br i1 %pre.3, label %then.then, label %then.else
+
+then.then:
+ %t.1 = icmp ult i8 %a, 100
+ %t.2 = icmp ult i8 %b, 100
+ %xor.1 = xor i1 %t.1, %t.2
+
+ %f.1 = icmp uge i8 %a, 100
+ %xor.2 = xor i1 %xor.1, %f.1
+
+ %f.2 = icmp uge i8 %b, 100
+ %xor.3 = xor i1 %xor.2, %f.2
+
+ %f.3.1 = icmp ugt i8 %a, 99
+ %xor.4 = xor i1 %xor.3, %f.3.1
+
+ %c.1 = icmp ult i8 %a, 99
+ %xor.5 = xor i1 %xor.4, %c.1
+
+ %c.2 = icmp ugt i8 %a, 98
+ %xor.6 = xor i1 %xor.5, %c.1
+
+ ret i1 %xor.6
+
+then.else:
+ %f.4 = icmp ult i8 %a, 100
+ %f.5 = icmp ult i8 %b, 100
+ %xor.7 = xor i1 %f.4, %f.5
+
+ %t.3 = icmp uge i8 %a, 100
+ %xor.8 = xor i1 %xor.7, %t.3
+
+ %t.4 = icmp uge i8 %b, 100
+ %xor.9 = xor i1 %xor.8, %t.4
+
+ %t.5 = icmp ugt i8 %a, 99
+ %xor.10 = xor i1 %xor.9, %t.5
+
+ %c.3 = icmp ult i8 %a, 99
+ %xor.11 = xor i1 %xor.10, %c.3
+
+ %c.4 = icmp ugt i8 %a, 98
+ %xor.12 = xor i1 %xor.11, %c.4
+
+ ret i1 %xor.12
+
+else:
+ %cmp.2 = icmp ult i8 %a, 100
+ ret i1 %cmp.2
+}
+
+; Test of explicitly using uge & ule instead of eq.
+define i1 @test_eq_as_uge_ule_(i8 %a, i8 %b) {
+; CHECK-LABEL: @test_eq_as_uge_ule_(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[PRE_1:%.*]] = icmp uge i8 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[PRE_2:%.*]] = icmp ule i8 [[A]], [[B]]
+; CHECK-NEXT: [[PRE_AND:%.*]] = and i1 [[PRE_1]], [[PRE_2]]
+; CHECK-NEXT: br i1 [[PRE_AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[PRE_3:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: br i1 [[PRE_3]], label [[THEN_THEN:%.*]], label [[THEN_ELSE:%.*]]
+; CHECK: then.then:
+; CHECK-NEXT: [[T_1:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: [[T_2:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[XOR_1:%.*]] = xor i1 true, true
+; CHECK-NEXT: [[F_1:%.*]] = icmp uge i8 [[A]], 100
+; CHECK-NEXT: [[XOR_2:%.*]] = xor i1 [[XOR_1]], false
+; CHECK-NEXT: [[F_2:%.*]] = icmp uge i8 [[B]], 100
+; CHECK-NEXT: [[XOR_3:%.*]] = xor i1 [[XOR_2]], false
+; CHECK-NEXT: [[F_3_1:%.*]] = icmp ugt i8 [[A]], 99
+; CHECK-NEXT: [[XOR_4:%.*]] = xor i1 [[XOR_3]], false
+; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[A]], 99
+; CHECK-NEXT: [[XOR_5:%.*]] = xor i1 [[XOR_4]], [[C_1]]
+; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i8 [[A]], 98
+; CHECK-NEXT: [[XOR_6:%.*]] = xor i1 [[XOR_5]], [[C_1]]
+; CHECK-NEXT: ret i1 [[XOR_6]]
+; CHECK: then.else:
+; CHECK-NEXT: [[F_4:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: [[F_5:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[XOR_7:%.*]] = xor i1 false, false
+; CHECK-NEXT: [[T_3:%.*]] = icmp uge i8 [[A]], 100
+; CHECK-NEXT: [[XOR_8:%.*]] = xor i1 [[XOR_7]], true
+; CHECK-NEXT: [[T_4:%.*]] = icmp uge i8 [[B]], 100
+; CHECK-NEXT: [[XOR_9:%.*]] = xor i1 [[XOR_8]], true
+; CHECK-NEXT: [[T_5:%.*]] = icmp ugt i8 [[A]], 99
+; CHECK-NEXT: [[XOR_10:%.*]] = xor i1 [[XOR_9]], true
+; CHECK-NEXT: [[C_3:%.*]] = icmp ult i8 [[A]], 99
+; CHECK-NEXT: [[XOR_11:%.*]] = xor i1 [[XOR_10]], false
+; CHECK-NEXT: [[C_4:%.*]] = icmp ugt i8 [[A]], 98
+; CHECK-NEXT: [[XOR_12:%.*]] = xor i1 [[XOR_11]], true
+; CHECK-NEXT: ret i1 [[XOR_12]]
+; CHECK: else:
+; CHECK-NEXT: [[CMP_2:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: ret i1 [[CMP_2]]
+;
+entry:
+ %pre.1 = icmp uge i8 %a, %b
+ %pre.2 = icmp ule i8 %a, %b
+ %pre.and = and i1 %pre.1, %pre.2
+ br i1 %pre.and, label %then, label %else
+
+then:
+ %pre.3 = icmp ult i8 %b, 100
+ br i1 %pre.3, label %then.then, label %then.else
+
+then.then:
+ %t.1 = icmp ult i8 %a, 100
+ %t.2 = icmp ult i8 %b, 100
+ %xor.1 = xor i1 %t.1, %t.2
+
+ %f.1 = icmp uge i8 %a, 100
+ %xor.2 = xor i1 %xor.1, %f.1
+
+ %f.2 = icmp uge i8 %b, 100
+ %xor.3 = xor i1 %xor.2, %f.2
+
+ %f.3.1 = icmp ugt i8 %a, 99
+ %xor.4 = xor i1 %xor.3, %f.3.1
+
+ %c.1 = icmp ult i8 %a, 99
+ %xor.5 = xor i1 %xor.4, %c.1
+
+ %c.2 = icmp ugt i8 %a, 98
+ %xor.6 = xor i1 %xor.5, %c.1
+
+ ret i1 %xor.6
+
+then.else:
+ %f.4 = icmp ult i8 %a, 100
+ %f.5 = icmp ult i8 %b, 100
+ %xor.7 = xor i1 %f.4, %f.5
+
+ %t.3 = icmp uge i8 %a, 100
+ %xor.8 = xor i1 %xor.7, %t.3
+
+ %t.4 = icmp uge i8 %b, 100
+ %xor.9 = xor i1 %xor.8, %t.4
+
+ %t.5 = icmp ugt i8 %a, 99
+ %xor.10 = xor i1 %xor.9, %t.5
+
+ %c.3 = icmp ult i8 %a, 99
+ %xor.11 = xor i1 %xor.10, %c.3
+
+ %c.4 = icmp ugt i8 %a, 98
+ %xor.12 = xor i1 %xor.11, %c.4
+
+ ret i1 %xor.12
+
+else:
+ %cmp.2 = icmp ult i8 %a, 100
+ ret i1 %cmp.2
+}
+
+
+define i1 @test_eq_ult_and(i8 %a, i8 %b) {
+; CHECK-LABEL: @test_eq_ult_and(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[PRE_1:%.*]] = icmp eq i8 [[A:%.*]], [[B:%.*]]
+; CHECK-NEXT: [[PRE_2:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[PRE_AND:%.*]] = and i1 [[PRE_1]], [[PRE_2]]
+; CHECK-NEXT: br i1 [[PRE_AND]], label [[THEN:%.*]], label [[ELSE:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[T_1:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: [[T_2:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[XOR_1:%.*]] = xor i1 [[T_1]], true
+; CHECK-NEXT: [[F_1:%.*]] = icmp uge i8 [[A]], 100
+; CHECK-NEXT: [[XOR_2:%.*]] = xor i1 [[XOR_1]], [[F_1]]
+; CHECK-NEXT: [[F_2:%.*]] = icmp uge i8 [[B]], 100
+; CHECK-NEXT: [[XOR_3:%.*]] = xor i1 [[XOR_2]], false
+; CHECK-NEXT: [[F_3_1:%.*]] = icmp ugt i8 [[A]], 99
+; CHECK-NEXT: [[XOR_4:%.*]] = xor i1 [[XOR_3]], [[F_3_1]]
+; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[A]], 99
+; CHECK-NEXT: [[XOR_5:%.*]] = xor i1 [[XOR_4]], [[C_1]]
+; CHECK-NEXT: [[C_2:%.*]] = icmp ugt i8 [[A]], 98
+; CHECK-NEXT: [[XOR_6:%.*]] = xor i1 [[XOR_5]], [[C_1]]
+; CHECK-NEXT: ret i1 [[XOR_6]]
+; CHECK: else:
+; CHECK-NEXT: [[F_4:%.*]] = icmp ult i8 [[A]], 100
+; CHECK-NEXT: [[F_5:%.*]] = icmp ult i8 [[B]], 100
+; CHECK-NEXT: [[XOR_7:%.*]] = xor i1 [[F_4]], [[F_5]]
+; CHECK-NEXT: [[T_3:%.*]] = icmp uge i8 [[A]], 100
+; CHECK-NEXT: [[XOR_8:%.*]] = xor i1 [[XOR_7]], [[T_3]]
+; CHECK-NEXT: [[T_4:%.*]] = icmp uge i8 [[B]], 100
+; CHECK-NEXT: [[XOR_9:%.*]] = xor i1 [[XOR_8]], [[T_4]]
+; CHECK-NEXT: [[T_5:%.*]] = icmp ugt i8 [[A]], 99
+; CHECK-NEXT: [[XOR_10:%.*]] = xor i1 [[XOR_9]], [[T_5]]
+; CHECK-NEXT: [[C_3:%.*]] = icmp ult i8 [[A]], 99
+; CHECK-NEXT: [[XOR_11:%.*]] = xor i1 [[XOR_10]], [[C_3]]
+; CHECK-NEXT: [[C_4:%.*]] = icmp ugt i8 [[A]], 98
+; CHECK-NEXT: [[XOR_12:%.*]] = xor i1 [[XOR_11]], [[C_4]]
+; CHECK-NEXT: ret i1 [[XOR_12]]
+;
+entry:
+ %pre.1 = icmp eq i8 %a, %b
+ %pre.2 = icmp ult i8 %b, 100
+ %pre.and = and i1 %pre.1, %pre.2
+ br i1 %pre.and, label %then, label %else
+
+then:
+ %t.1 = icmp ult i8 %a, 100
+ %t.2 = icmp ult i8 %b, 100
+ %xor.1 = xor i1 %t.1, %t.2
+
+ %f.1 = icmp uge i8 %a, 100
+ %xor.2 = xor i1 %xor.1, %f.1
+
+ %f.2 = icmp uge i8 %b, 100
+ %xor.3 = xor i1 %xor.2, %f.2
+
+ %f.3.1 = icmp ugt i8 %a, 99
+ %xor.4 = xor i1 %xor.3, %f.3.1
+
+ %c.1 = icmp ult i8 %a, 99
+ %xor.5 = xor i1 %xor.4, %c.1
+
+ %c.2 = icmp ugt i8 %a, 98
+ %xor.6 = xor i1 %xor.5, %c.1
+
+ ret i1 %xor.6
+
+else:
+ %f.4 = icmp ult i8 %a, 100
+ %f.5 = icmp ult i8 %b, 100
+ %xor.7 = xor i1 %f.4, %f.5
+
+ %t.3 = icmp uge i8 %a, 100
+ %xor.8 = xor i1 %xor.7, %t.3
+
+ %t.4 = icmp uge i8 %b, 100
+ %xor.9 = xor i1 %xor.8, %t.4
+
+ %t.5 = icmp ugt i8 %a, 99
+ %xor.10 = xor i1 %xor.9, %t.5
+
+ %c.3 = icmp ult i8 %a, 99
+ %xor.11 = xor i1 %xor.10, %c.3
+
+ %c.4 = icmp ugt i8 %a, 98
+ %xor.12 = xor i1 %xor.11, %c.4
+
+ ret i1 %xor.12
+}