llvm/test/Transforms/InstCombine/fold-add-sub.ll

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

declare void @use.i8(i8)
define i8 @test_add_nsw(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_add_nsw(
; CHECK-NEXT:    [[LHS:%.*]] = add nsw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = add nsw i8 [[X]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub nsw i8 [[Y]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = add nsw i8 %x, %y
  %rhs = add nsw i8 %x, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = sub nsw i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_add_nsw_no_prop(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_add_nsw_no_prop(
; CHECK-NEXT:    [[LHS:%.*]] = add nsw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = add nuw i8 [[X]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[Y]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = add nsw i8 %x, %y
  %rhs = add nuw i8 %x, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = sub nsw i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_add(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_add(
; CHECK-NEXT:    [[LHS:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = add i8 [[X]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[Y]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = add i8 %x, %y
  %rhs = add i8 %x, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = sub i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_add_fail(i8 %w, i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_add_fail(
; CHECK-NEXT:    [[LHS:%.*]] = add i8 [[W:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = add i8 [[X:%.*]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[LHS]], [[RHS]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = add i8 %w, %y
  %rhs = add i8 %x, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = sub i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_add_nuw(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_add_nuw(
; CHECK-NEXT:    [[LHS:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = or disjoint i8 [[X]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub nuw i8 [[Y]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = add i8 %x, %y
  %rhs = or disjoint i8 %x, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = sub nuw i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_add_nuw_no_prop(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_add_nuw_no_prop(
; CHECK-NEXT:    [[LHS:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = or disjoint i8 [[X]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[Y]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = add i8 %x, %y
  %rhs = or disjoint i8 %x, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = sub i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_sub_nuw(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_sub_nuw(
; CHECK-NEXT:    [[LHS:%.*]] = sub nuw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = sub nuw i8 [[Y]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub nuw i8 [[X]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = sub nuw i8 %x, %y
  %rhs = sub nuw i8 %y, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = add i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_sub_nuw_no_prop(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_sub_nuw_no_prop(
; CHECK-NEXT:    [[LHS:%.*]] = sub nuw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = sub i8 [[Y]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = sub nuw i8 %x, %y
  %rhs = sub i8 %y, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = add nuw i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_sub_nsw(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_sub_nsw(
; CHECK-NEXT:    [[LHS:%.*]] = sub nsw i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = sub nsw i8 [[Y]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub nsw i8 [[X]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = sub nsw i8 %x, %y
  %rhs = sub nsw i8 %y, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = or disjoint i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_sub_nsw_no_prop(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_sub_nsw_no_prop(
; CHECK-NEXT:    [[LHS:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = sub nsw i8 [[Y]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = sub i8 %x, %y
  %rhs = sub nsw i8 %y, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = or disjoint i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_sub_none(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_sub_none(
; CHECK-NEXT:    [[LHS:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = sub i8 [[Y]], [[Z:%.*]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = sub i8 [[X]], [[Z]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = sub i8 %x, %y
  %rhs = sub i8 %y, %z
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = add i8 %lhs, %rhs
  ret i8 %r
}

define i8 @test_sub_none_fail(i8 %x, i8 %y, i8 %z) {
; CHECK-LABEL: @test_sub_none_fail(
; CHECK-NEXT:    [[LHS:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[RHS:%.*]] = sub i8 [[Z:%.*]], [[Y]]
; CHECK-NEXT:    call void @use.i8(i8 [[LHS]])
; CHECK-NEXT:    call void @use.i8(i8 [[RHS]])
; CHECK-NEXT:    [[R:%.*]] = add i8 [[LHS]], [[RHS]]
; CHECK-NEXT:    ret i8 [[R]]
;
  %lhs = sub i8 %x, %y
  %rhs = sub i8 %z, %y
  call void @use.i8(i8 %lhs)
  call void @use.i8(i8 %rhs)
  %r = add i8 %lhs, %rhs
  ret i8 %r
}