Codebase Browser
llvm
Go to App

llvm/llvm/test/Transforms/ConstraintElimination/and-implied-by-operands.ll 

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

define i1 @test_second_and_condition_implied_by_first(i8 %x) {
; CHECK-LABEL: @test_second_and_condition_implied_by_first(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], true
; CHECK-NEXT:    br i1 [[AND]], 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
  %t.1 = icmp ugt i8 %x, 5
  %and = and i1 %c.1, %t.1
  br i1 %and, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_first_and_condition_implied_by_second_ops(i8 %x) {
; CHECK-LABEL: @test_first_and_condition_implied_by_second_ops(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[AND:%.*]] = and i1 true, [[C_1]]
; CHECK-NEXT:    br i1 [[AND]], 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
  %t.1 = icmp ugt i8 %x, 5
  %and = and i1 %t.1, %c.1
  br i1 %and, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_second_and_condition_implied_by_first_select_form(i8 %x) {
; CHECK-LABEL: @test_second_and_condition_implied_by_first_select_form(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[C_1]], i1 true, i1 false
; CHECK-NEXT:    br i1 [[AND]], 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
  %t.1 = icmp ugt i8 %x, 5
  %and = select i1 %c.1, i1 %t.1, i1 false
  br i1 %and, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_first_and_condition_implied_by_second_select_form(i8 %x) {
; CHECK-LABEL: @test_first_and_condition_implied_by_second_select_form(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[T_1:%.*]] = icmp ugt i8 [[X]], 5
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[T_1]], i1 [[C_1]], i1 false
; CHECK-NEXT:    br i1 [[AND]], 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
  %t.1 = icmp ugt i8 %x, 5
  %and = select i1 %t.1, i1 %c.1, i1 false
  br i1 %and, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_same_cond_for_and(i8 %x) {
; CHECK-LABEL: @test_same_cond_for_and(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[AND:%.*]] = and i1 true, [[C_1]]
; CHECK-NEXT:    br i1 [[AND]], 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
  %and = and i1 %c.1, %c.1
  br i1 %and, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_same_cond_for_and_select_form(i8 %x) {
; CHECK-LABEL: @test_same_cond_for_and_select_form(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ugt i8 [[X:%.*]], 10
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[C_1]], i1 [[C_1]], i1 false
; CHECK-NEXT:    br i1 [[AND]], 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
  %and = select i1 %c.1, i1 %c.1, i1 false
  br i1 %and, label %then, label %else

then:
  ret i1 0

else:
  ret i1 1
}

define i1 @test_second_and_condition_not_implied_by_first(i8 %x) {
; CHECK-LABEL: @test_second_and_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:    [[AND:%.*]] = and i1 true, [[C_1]]
; CHECK-NEXT:    br i1 [[AND]], 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
  %and = and i1 %c.2, %c.1
  br i1 %and, 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:    [[AND:%.*]] = and i1 true, [[C_3]]
; CHECK-NEXT:    ret i1 [[AND]]
; 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
  %and = and i1 %c.2, %c.3
  ret i1 %and

else.2:
  ret i1 0

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

define i1 @test_and_op_0_simplified(i32 %v) {
; CHECK-LABEL: @test_and_op_0_simplified(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp sgt i32 [[V:%.*]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 false, [[C_1]]
; CHECK-NEXT:    ret i1 [[AND]]
;
entry:
  %c.1 = icmp sgt i32 %v, 0
  %t.1 = icmp sgt i32 0, 0
  %and = and i1 %t.1, %c.1
  ret i1 %and
}

define i1 @test_and_op_1_simplified(i32 %v) {
; CHECK-LABEL: @test_and_op_1_simplified(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp sgt i32 [[V:%.*]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_1]], false
; CHECK-NEXT:    ret i1 [[AND]]
;
entry:
  %c.1 = icmp sgt i32 %v, 0
  %t.1 = icmp sgt i32 0, 0
  %and = and i1 %c.1, %t.1
  ret i1 %and
}

define i1 @and_select_not_used_for_branch(i32 %x, i32 %y,i32 %z) {
; CHECK-LABEL: @and_select_not_used_for_branch(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ne i32 [[X:%.*]], 0
; CHECK-NEXT:    [[C_2:%.*]] = icmp ne i32 [[Y:%.*]], 0
; CHECK-NEXT:    [[C_3:%.*]] = icmp eq i32 [[X]], 16
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_2]], [[C_3]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[EXIT:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[C_4:%.*]] = icmp eq i32 [[Z:%.*]], 0
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[C_4]], i1 true, i1 false
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ [[C_1]], [[ENTRY:%.*]] ], [ [[SEL]], [[THEN]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %c.1 = icmp ne i32 %x, 0
  %c.2 = icmp ne i32 %y, 0
  %c.3 = icmp eq i32 %x, 16
  %and = and i1 %c.2, %c.3
  br i1 %and, label %then, label %exit

then:
  %c.4 = icmp eq i32 %z, 0
  %sel = select i1 %c.4, i1 %c.1, i1 false
  br label %exit

exit:
  %res = phi i1 [ %c.1, %entry ], [ %sel, %then ]
  ret i1 %res
}

define i1 @and_select_scope_limited(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @and_select_scope_limited(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ne i32 [[X:%.*]], 0
; CHECK-NEXT:    [[C_2:%.*]] = icmp ne i32 [[Y:%.*]], 0
; CHECK-NEXT:    [[C_3:%.*]] = icmp eq i32 [[X]], 16
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_2]], [[C_3]]
; CHECK-NEXT:    br i1 [[AND]], label [[THEN:%.*]], label [[EXIT:%.*]]
; CHECK:       then:
; CHECK-NEXT:    [[C_4:%.*]] = icmp eq i32 [[Z:%.*]], 0
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[C_4]], i1 true, i1 false
; CHECK-NEXT:    br i1 [[SEL]], label [[T_1:%.*]], label [[EXIT]]
; CHECK:       t.1:
; CHECK-NEXT:    ret i1 true
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = phi i1 [ [[C_1]], [[ENTRY:%.*]] ], [ [[SEL]], [[THEN]] ]
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  %c.1 = icmp ne i32 %x, 0
  %c.2 = icmp ne i32 %y, 0
  %c.3 = icmp eq i32 %x, 16
  %and = and i1 %c.2, %c.3
  br i1 %and, label %then, label %exit

then:
  %c.4 = icmp eq i32 %z, 0
  %sel = select i1 %c.4, i1 %c.1, i1 false
  br i1 %sel, label %t.1, label %exit

t.1:
  ret i1 %c.1

exit:
  %res = phi i1 [ %c.1, %entry ], [ %sel, %then ]
  ret i1 %res
}

declare void @use(ptr)

define void @test_monotonic_ptr_iv_inc_1_eq_to_uge(ptr %start, i16 %len) {
; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_eq_to_uge(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
; CHECK-NEXT:    br label [[LOOP_PH:%.*]]
; CHECK:       loop.ph:
; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
; CHECK:       loop.header:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp sgt i16 [[LEN]], 0
; CHECK-NEXT:    [[C:%.*]] = icmp ne ptr [[PTR_IV]], [[UPPER]]
; CHECK-NEXT:    [[AND_0:%.*]] = and i1 [[LEN_NEG]], [[C]]
; CHECK-NEXT:    br i1 [[AND_0]], label [[FOR_BODY:%.*]], label [[EXIT:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
; CHECK:       loop.latch:
; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
; CHECK-NEXT:    br label [[LOOP_HEADER]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  %upper = getelementptr inbounds i32, ptr %start, i16 %len
  br label %loop.ph

loop.ph:
  br label %loop.header

loop.header:
  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
  %len.neg = icmp sgt i16 %len, 0
  %c = icmp ne ptr %ptr.iv, %upper
  %and.0 = and i1 %len.neg, %c
  br i1 %and.0, label %for.body, label %exit

for.body:
  %t.1 = icmp uge ptr %ptr.iv, %start
  %t.2 = icmp ult ptr %ptr.iv, %upper
  %and = and i1 %t.1, %t.2
  br i1 %and, label %loop.latch, label %exit

loop.latch:
  call void @use(ptr %ptr.iv)
  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
  br label %loop.header

exit:
  ret void
}

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

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

then:
  ret i1 %t.1

else:
  ret i1 %t.1
}

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:    [[AND:%.*]] = or i1 [[C_1]], false
; CHECK-NEXT:    br i1 [[AND]], 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
  %and = or i1 %c.1, %t.1
  br i1 %and, 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:    [[AND:%.*]] = or i1 false, [[T_1]]
; CHECK-NEXT:    br i1 [[AND]], 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
  %and = or i1 %c.1, %t.1
  br i1 %and, label %then, label %else

then:
  ret i1 %t.1

else:
  ret i1 %t.1
}

define i1 @and_select_first_implies_second_may_be_poison(ptr noundef %A, ptr noundef %B) {
; CHECK-LABEL: @and_select_first_implies_second_may_be_poison(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ne ptr [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds ptr, ptr [[B]], i64 -1
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt ptr [[GEP]], [[A]]
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[C_2]], i1 true, i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
entry:
  %c.1 = icmp ne ptr %A, %B
  %gep = getelementptr inbounds ptr, ptr %B, i64 -1
  %c.2 = icmp ugt ptr %gep, %A
  %and = select i1 %c.2, i1 %c.1, i1 false
  ret i1 %and
}

define i1 @and_select_second_implies_first_may_be_poison(ptr noundef %A, ptr noundef %B) {
; CHECK-LABEL: @and_select_second_implies_first_may_be_poison(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ne ptr [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds ptr, ptr [[B]], i64 -1
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt ptr [[GEP]], [[A]]
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[C_1]], i1 [[C_2]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
entry:
  %c.1 = icmp ne ptr %A, %B
  %gep = getelementptr inbounds ptr, ptr %B, i64 -1
  %c.2 = icmp ugt ptr %gep, %A
  %and = select i1 %c.1, i1 %c.2, i1 false
  ret i1 %and
}

define i1 @and_select_second_implies_first_guaranteed_not_poison(ptr noundef %A, ptr noundef %B) {
; CHECK-LABEL: @and_select_second_implies_first_guaranteed_not_poison(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[C_1:%.*]] = icmp ne ptr [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds ptr, ptr [[B]], i64 -1
; CHECK-NEXT:    [[C_2:%.*]] = icmp ugt ptr [[GEP]], [[A]]
; CHECK-NEXT:    call void @no_noundef(i1 [[C_2]])
; CHECK-NEXT:    [[AND:%.*]] = select i1 [[C_1]], i1 [[C_2]], i1 false
; CHECK-NEXT:    ret i1 [[AND]]
;
entry:
  %c.1 = icmp ne ptr %A, %B
  %gep = getelementptr inbounds ptr, ptr %B, i64 -1
  %c.2 = icmp ugt ptr %gep, %A
  call void @no_noundef(i1 %c.2)
  %and = select i1 %c.1, i1 %c.2, i1 false
  ret i1 %and
}

declare void @no_noundef(i1 noundef)