xref: /llvm-project/llvm/test/Transforms/ConstraintElimination/or-implied-by-operands.ll (revision fbcf8a8cbb2461730bfd0603b396842925a88ef2)

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s

define i1 @test_second_or_condition_implied_by_first(i8 %x) {
; CHECK-LABEL: @test_second_or_condition_implied_by_first(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = or i1 true, [[T_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ule i8 %x, 10
  %t.1 = icmp ugt i8 %x, 5
  %or = or i1 %c.1, %t.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_first_or_condition_implied_by_second_ops(i8 %x) {
; CHECK-LABEL: @test_first_or_condition_implied_by_second_ops(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[T_1]], true
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ule i8 %x, 10
  %t.1 = icmp ugt i8 %x, 5
  %or = or i1 %t.1, %c.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_second_or_condition_implied_by_first_select_form(i8 %x) {
; CHECK-LABEL: @test_second_or_condition_implied_by_first_select_form(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = select i1 [[C_1]], i1 false, i1 [[T_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ule i8 %x, 10
  %t.1 = icmp ugt i8 %x, 5
  %or = select i1 %c.1, i1 false, i1 %t.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_first_or_condition_implied_by_second_select_form(i8 %x) {
; CHECK-LABEL: @test_first_or_condition_implied_by_second_select_form(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = select i1 [[T_1]], i1 false, i1 [[C_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ule i8 %x, 10
  %t.1 = icmp ugt i8 %x, 5
  %or = select i1 %t.1, i1 false, i1 %c.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_same_cond_for_or(i8 %x) {
; CHECK-LABEL: @test_same_cond_for_or(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[OR:%.*]] = or i1 false, [[C_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ugt i8 %x, 10
  %or = or i1 %c.1, %c.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_same_cond_for_or_select_form(i8 %x) {
; CHECK-LABEL: @test_same_cond_for_or_select_form(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[OR:%.*]] = select i1 [[C_1]], i1 false, i1 [[C_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ugt i8 %x, 10
  %or = select i1 %c.1, i1 false, i1 %c.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_second_or_condition_not_implied_by_first(i8 %x) {
; CHECK-LABEL: @test_second_or_condition_not_implied_by_first(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[C_2]], false
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 false
; CHECK:       else:
; CHECK-NEXT:    ret i1 true
;
entry:
  %c.1 = icmp ugt i8 %x, 10
  %c.2 = icmp ugt i8 %x, 5
  %or = or i1 %c.2, %c.1
  br i1 %or, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_remove_variables(i1 %c, ptr %A, i64 %B, ptr %C) {
; CHECK-LABEL: @test_remove_variables(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[C:%.*]], label [[THEN_1:%.*]], label [[EXIT:%.*]]
; CHECK:       then.1:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[C:%.*]], align 8
; CHECK-NEXT:    [[C_1:%.*]] = icmp ult ptr [[TMP0]], [[A:%.*]]
; CHECK-NEXT:    br i1 [[C_1]], label [[THEN_2:%.*]], label [[ELSE_2:%.*]]
; CHECK:       then.2:
; CHECK-NEXT:    [[C_3:%.*]] = icmp sgt i64 [[B:%.*]], 0
; CHECK-NEXT:    [[OR:%.*]] = or i1 true, [[C_3]]
; CHECK-NEXT:    ret i1 [[OR]]
; CHECK:       else.2:
; CHECK-NEXT:    ret i1 false
; CHECK:       exit:
; CHECK-NEXT:    ret i1 true
;
entry:
  br i1 %c, label %then.1, label %exit

then.1:
  %0 = load ptr, ptr %C, align 8
  %c.1 = icmp ult ptr %0, %A
  br i1 %c.1, label %then.2, label %else.2

then.2:
  %c.2 = icmp ne ptr %A, null
  %c.3 = icmp sgt i64 %B, 0
  %or = or i1 %c.2, %c.3
  ret i1 %or

else.2:
  ret i1 0

exit:
  %t = icmp eq ptr null, null
  ret i1 %t
}

define i1 @test_or_op_0_simplified(i32 %v) {
; CHECK-LABEL: @test_or_op_0_simplified(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp sgt i32 [[V:%.*]], 0
; CHECK-NEXT:    [[OR:%.*]] = or i1 false, [[C_1]]
; CHECK-NEXT:    ret i1 [[OR]]
;
entry:
  %c.1 = icmp sgt i32 %v, 0
  %t.1 = icmp sgt i32 0, 0
  %or = or i1 %t.1, %c.1
  ret i1 %or
}

define i1 @test_or_op_1_simplified(i32 %v) {
; CHECK-LABEL: @test_or_op_1_simplified(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp sgt i32 [[V:%.*]], 0
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[C_1]], false
; CHECK-NEXT:    ret i1 [[OR]]
;
entry:
  %c.1 = icmp sgt i32 %v, 0
  %t.1 = icmp sgt i32 0, 0
  %or = or i1 %c.1, %t.1
  ret i1 %or
}

define i1 @test_or_used_in_false_branch(i8 %x) {
; CHECK-LABEL: @test_or_used_in_false_branch(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ule i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ule i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = or i1 [[C_1]], false
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 [[T_1]]
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;

entry:
  %c.1 = icmp ule i8 %x, 10
  %t.1 = icmp ule i8 %x, 5
  %or = or i1 %c.1, %t.1
  br i1 %or, label %then, label %else

then:
  ret i1 %t.1

else:
  ret i1 %t.1
}

define i1 @test_or_used_in_false_branch2(i8 %x) {
; CHECK-LABEL: @test_or_used_in_false_branch2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[OR:%.*]] = or i1 false, [[T_1]]
; CHECK-NEXT:    br i1 [[OR]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK:       then:
; CHECK-NEXT:    ret i1 [[T_1]]
; CHECK:       else:
; CHECK-NEXT:    ret i1 false
;

entry:
  %c.1 = icmp ugt i8 %x, 10
  %t.1 = icmp ugt i8 %x, 5
  %or = or i1 %c.1, %t.1
  br i1 %or, label %then, label %else

then:
  ret i1 %t.1

else:
  ret i1 %t.1
}

define i1 @select_or_set_operand(ptr noundef %a, ptr noundef %b) {
; CHECK-LABEL: @select_or_set_operand(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP_EQ:%.*]] = icmp eq ptr [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[INCDEC_PTR12_I:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 1
; CHECK-NEXT:    [[CMP_EQ_1:%.*]] = icmp eq ptr [[INCDEC_PTR12_I]], [[B]]
; CHECK-NEXT:    [[OR:%.*]] = select i1 [[CMP_EQ]], i1 true, i1 [[CMP_EQ_1]]
; CHECK-NEXT:    ret i1 [[OR]]
;
entry:
  %cmp.eq = icmp eq ptr %a, %b
  %incdec.ptr12.i = getelementptr inbounds i32, ptr %a, i64 1
  %cmp.eq.1 = icmp eq ptr %incdec.ptr12.i, %b
  %or = select i1 %cmp.eq, i1 true, i1 %cmp.eq.1
  ret i1 %or
}