llvm/test/Transforms/InstCombine/addsub-constant-folding.ll

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

declare void @use(i32 %arg)
declare void @vec_use(<4 x i32> %arg)

; (x+c1)+c2

define i32 @add_const_add_const(i32 %arg) {
; CHECK-LABEL: @add_const_add_const(
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG:%.*]], 10
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = add i32 %arg, 8
  %t1 = add i32 %t0, 2
  ret i32 %t1
}

define i32 @add_const_add_const_extrause(i32 %arg) {
; CHECK-LABEL: @add_const_add_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add i32 [[ARG:%.*]], 8
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG]], 10
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = add i32 %arg, 8
  call void @use(i32 %t0)
  %t1 = add i32 %t0, 2
  ret i32 %t1
}

define <4 x i32> @vec_add_const_add_const(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_add_const(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 10, i32 10, i32 10, i32 10>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  %t1 = add <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_add_const_add_const_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_add_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 8, i32 8, i32 8, i32 8>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG]], <i32 10, i32 10, i32 10, i32 10>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  call void @vec_use(<4 x i32> %t0)
  %t1 = add <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_add_const_add_const_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_add_const_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 23, i32 undef, i32 undef, i32 10>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 21, i32 undef, i32 8, i32 8>
  %t1 = add <4 x i32> %t0, <i32 2, i32 3, i32 undef, i32 2>
  ret <4 x i32> %t1
}

; (x+c1)-c2

define i32 @add_const_sub_const(i32 %arg) {
; CHECK-LABEL: @add_const_sub_const(
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG:%.*]], 6
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = add i32 %arg, 8
  %t1 = sub i32 %t0, 2
  ret i32 %t1
}

define i32 @add_const_sub_const_extrause(i32 %arg) {
; CHECK-LABEL: @add_const_sub_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add i32 [[ARG:%.*]], 8
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG]], 6
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = add i32 %arg, 8
  call void @use(i32 %t0)
  %t1 = sub i32 %t0, 2
  ret i32 %t1
}

define <4 x i32> @vec_add_const_sub_const(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_sub_const(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 6, i32 6, i32 6, i32 6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  %t1 = sub <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_add_const_sub_const_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_sub_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 8, i32 8, i32 8, i32 8>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG]], <i32 6, i32 6, i32 6, i32 6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  call void @vec_use(<4 x i32> %t0)
  %t1 = sub <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_add_const_sub_const_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_sub_const_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 19, i32 undef, i32 undef, i32 6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 21, i32 undef, i32 8, i32 8>
  %t1 = sub <4 x i32> %t0, <i32 2, i32 3, i32 undef, i32 2>
  ret <4 x i32> %t1
}

; c2-(x+c1)

define i32 @add_const_const_sub(i32 %arg) {
; CHECK-LABEL: @add_const_const_sub(
; CHECK-NEXT:    [[T1:%.*]] = sub i32 -6, [[ARG:%.*]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = add i32 %arg, 8
  %t1 = sub i32 2, %t0
  ret i32 %t1
}

define i32 @add_const_const_sub_extrause(i32 %arg) {
; CHECK-LABEL: @add_const_const_sub_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add i32 [[ARG:%.*]], 8
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub i32 -6, [[ARG]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = add i32 %arg, 8
  call void @use(i32 %t0)
  %t1 = sub i32 2, %t0
  ret i32 %t1
}

define <4 x i32> @vec_add_const_const_sub(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_const_sub(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 -6, i32 -6, i32 -6, i32 -6>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  %t1 = sub <4 x i32> <i32 2, i32 2, i32 2, i32 2>, %t0
  ret <4 x i32> %t1
}

define <4 x i32> @vec_add_const_const_sub_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_const_sub_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 8, i32 8, i32 8, i32 8>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 -6, i32 -6, i32 -6, i32 -6>, [[ARG]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  call void @vec_use(<4 x i32> %t0)
  %t1 = sub <4 x i32> <i32 2, i32 2, i32 2, i32 2>, %t0
  ret <4 x i32> %t1
}

define <4 x i32> @vec_add_const_const_sub_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_add_const_const_sub_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 -19, i32 undef, i32 undef, i32 -6>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = add <4 x i32> %arg, <i32 21, i32 undef, i32 8, i32 8>
  %t1 = sub <4 x i32> <i32 2, i32 3, i32 undef, i32 2>, %t0
  ret <4 x i32> %t1
}

; (x-c1)+c2

define i32 @sub_const_add_const(i32 %arg) {
; CHECK-LABEL: @sub_const_add_const(
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG:%.*]], -6
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 %arg, 8
  %t1 = add i32 %t0, 2
  ret i32 %t1
}

define i32 @sub_const_add_const_extrause(i32 %arg) {
; CHECK-LABEL: @sub_const_add_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add i32 [[ARG:%.*]], -8
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG]], -6
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 %arg, 8
  call void @use(i32 %t0)
  %t1 = add i32 %t0, 2
  ret i32 %t1
}

define <4 x i32> @vec_sub_const_add_const(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_add_const(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -6, i32 -6, i32 -6, i32 -6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  %t1 = add <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_sub_const_add_const_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_add_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -8, i32 -8, i32 -8, i32 -8>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG]], <i32 -6, i32 -6, i32 -6, i32 -6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  call void @vec_use(<4 x i32> %t0)
  %t1 = add <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_sub_const_add_const_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_add_const_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -19, i32 undef, i32 undef, i32 -6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 21, i32 undef, i32 8, i32 8>
  %t1 = add <4 x i32> %t0, <i32 2, i32 3, i32 undef, i32 2>
  ret <4 x i32> %t1
}

; (x-c1)-c2

define i32 @sub_const_sub_const(i32 %arg) {
; CHECK-LABEL: @sub_const_sub_const(
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG:%.*]], -10
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 %arg, 8
  %t1 = sub i32 %t0, 2
  ret i32 %t1
}

define i32 @sub_const_sub_const_extrause(i32 %arg) {
; CHECK-LABEL: @sub_const_sub_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add i32 [[ARG:%.*]], -8
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG]], -10
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 %arg, 8
  call void @use(i32 %t0)
  %t1 = sub i32 %t0, 2
  ret i32 %t1
}

define <4 x i32> @vec_sub_const_sub_const(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_sub_const(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -10, i32 -10, i32 -10, i32 -10>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  %t1 = sub <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_sub_const_sub_const_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_sub_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -8, i32 -8, i32 -8, i32 -8>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG]], <i32 -10, i32 -10, i32 -10, i32 -10>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  call void @vec_use(<4 x i32> %t0)
  %t1 = sub <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_sub_const_sub_const_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_sub_const_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -23, i32 undef, i32 undef, i32 -10>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 21, i32 undef, i32 8, i32 8>
  %t1 = sub <4 x i32> %t0, <i32 2, i32 3, i32 undef, i32 2>
  ret <4 x i32> %t1
}

; c2-(x-c1)

define i32 @sub_const_const_sub(i32 %arg) {
; CHECK-LABEL: @sub_const_const_sub(
; CHECK-NEXT:    [[T1:%.*]] = sub i32 10, [[ARG:%.*]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 %arg, 8
  %t1 = sub i32 2, %t0
  ret i32 %t1
}

define i32 @sub_const_const_sub_extrause(i32 %arg) {
; CHECK-LABEL: @sub_const_const_sub_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add i32 [[ARG:%.*]], -8
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub i32 10, [[ARG]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 %arg, 8
  call void @use(i32 %t0)
  %t1 = sub i32 2, %t0
  ret i32 %t1
}

define <4 x i32> @vec_sub_const_const_sub(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_const_sub(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 10, i32 10, i32 10, i32 10>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  %t1 = sub <4 x i32> <i32 2, i32 2, i32 2, i32 2>, %t0
  ret <4 x i32> %t1
}

define <4 x i32> @vec_sub_const_const_sub_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_const_sub_extrause(
; CHECK-NEXT:    [[T0:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -8, i32 -8, i32 -8, i32 -8>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 10, i32 10, i32 10, i32 10>, [[ARG]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 8, i32 8, i32 8, i32 8>
  call void @vec_use(<4 x i32> %t0)
  %t1 = sub <4 x i32> <i32 2, i32 2, i32 2, i32 2>, %t0
  ret <4 x i32> %t1
}

define <4 x i32> @vec_sub_const_const_sub_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_sub_const_const_sub_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 23, i32 undef, i32 undef, i32 10>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> %arg, <i32 21, i32 undef, i32 8, i32 8>
  %t1 = sub <4 x i32> <i32 2, i32 3, i32 undef, i32 2>, %t0
  ret <4 x i32> %t1
}

; (c1-x)+c2

define i32 @const_sub_add_const(i32 %arg) {
; CHECK-LABEL: @const_sub_add_const(
; CHECK-NEXT:    [[T1:%.*]] = sub i32 10, [[ARG:%.*]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 8, %arg
  %t1 = add i32 %t0, 2
  ret i32 %t1
}

define i32 @const_sub_add_const_extrause(i32 %arg) {
; CHECK-LABEL: @const_sub_add_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = sub i32 8, [[ARG:%.*]]
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub i32 10, [[ARG]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 8, %arg
  call void @use(i32 %t0)
  %t1 = add i32 %t0, 2
  ret i32 %t1
}

define <4 x i32> @vec_const_sub_add_const(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_add_const(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 10, i32 10, i32 10, i32 10>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, %arg
  %t1 = add <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_const_sub_add_const_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_add_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, [[ARG:%.*]]
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 10, i32 10, i32 10, i32 10>, [[ARG]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, %arg
  call void @vec_use(<4 x i32> %t0)
  %t1 = add <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_const_sub_add_const_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_add_const_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 23, i32 undef, i32 undef, i32 10>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 21, i32 undef, i32 8, i32 8>, %arg
  %t1 = add <4 x i32> %t0, <i32 2, i32 3, i32 undef, i32 2>
  ret <4 x i32> %t1
}

; (c1-x)-c2

define i32 @const_sub_sub_const(i32 %arg) {
; CHECK-LABEL: @const_sub_sub_const(
; CHECK-NEXT:    [[T1:%.*]] = sub i32 6, [[ARG:%.*]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 8, %arg
  %t1 = sub i32 %t0, 2
  ret i32 %t1
}

define i32 @const_sub_sub_const_extrause(i32 %arg) {
; CHECK-LABEL: @const_sub_sub_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = sub i32 8, [[ARG:%.*]]
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub i32 6, [[ARG]]
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 8, %arg
  call void @use(i32 %t0)
  %t1 = sub i32 %t0, 2
  ret i32 %t1
}

define <4 x i32> @vec_const_sub_sub_const(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_sub_const(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 6, i32 6, i32 6, i32 6>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, %arg
  %t1 = sub <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_const_sub_sub_const_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_sub_const_extrause(
; CHECK-NEXT:    [[T0:%.*]] = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, [[ARG:%.*]]
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 6, i32 6, i32 6, i32 6>, [[ARG]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, %arg
  call void @vec_use(<4 x i32> %t0)
  %t1 = sub <4 x i32> %t0, <i32 2, i32 2, i32 2, i32 2>
  ret <4 x i32> %t1
}

define <4 x i32> @vec_const_sub_sub_const_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_sub_const_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = sub <4 x i32> <i32 19, i32 undef, i32 undef, i32 6>, [[ARG:%.*]]
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 21, i32 undef, i32 8, i32 8>, %arg
  %t1 = sub <4 x i32> %t0, <i32 2, i32 3, i32 undef, i32 2>
  ret <4 x i32> %t1
}

; c2-(c1-x)
; FIXME

define i32 @const_sub_const_sub(i32 %arg) {
; CHECK-LABEL: @const_sub_const_sub(
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG:%.*]], -6
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 8, %arg
  %t1 = sub i32 2, %t0
  ret i32 %t1
}

define i32 @const_sub_const_sub_extrause(i32 %arg) {
; CHECK-LABEL: @const_sub_const_sub_extrause(
; CHECK-NEXT:    [[T0:%.*]] = sub i32 8, [[ARG:%.*]]
; CHECK-NEXT:    call void @use(i32 [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add i32 [[ARG]], -6
; CHECK-NEXT:    ret i32 [[T1]]
;
  %t0 = sub i32 8, %arg
  call void @use(i32 %t0)
  %t1 = sub i32 2, %t0
  ret i32 %t1
}

define <4 x i32> @vec_const_sub_const_sub(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_const_sub(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -6, i32 -6, i32 -6, i32 -6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, %arg
  %t1 = sub <4 x i32> <i32 2, i32 2, i32 2, i32 2>, %t0
  ret <4 x i32> %t1
}

define <4 x i32> @vec_const_sub_const_sub_extrause(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_const_sub_extrause(
; CHECK-NEXT:    [[T0:%.*]] = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, [[ARG:%.*]]
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[T0]])
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG]], <i32 -6, i32 -6, i32 -6, i32 -6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 8, i32 8, i32 8, i32 8>, %arg
  call void @vec_use(<4 x i32> %t0)
  %t1 = sub <4 x i32> <i32 2, i32 2, i32 2, i32 2>, %t0
  ret <4 x i32> %t1
}

define <4 x i32> @vec_const_sub_const_sub_nonsplat(<4 x i32> %arg) {
; CHECK-LABEL: @vec_const_sub_const_sub_nonsplat(
; CHECK-NEXT:    [[T1:%.*]] = add <4 x i32> [[ARG:%.*]], <i32 -19, i32 undef, i32 undef, i32 -6>
; CHECK-NEXT:    ret <4 x i32> [[T1]]
;
  %t0 = sub <4 x i32> <i32 21, i32 undef, i32 8, i32 8>, %arg
  %t1 = sub <4 x i32> <i32 2, i32 3, i32 undef, i32 2>, %t0
  ret <4 x i32> %t1
}

define i7 @addsub_combine_constants(i7 %x, i7 %y) {
; CHECK-LABEL: @addsub_combine_constants(
; CHECK-NEXT:    [[TMP1:%.*]] = sub i7 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT:    [[A2:%.*]] = add i7 [[TMP1]], 52
; CHECK-NEXT:    ret i7 [[A2]]
;
  %a1 = add i7 %x, 42
  %s = sub i7 10, %y
  %a2 = add nsw i7 %a1, %s
  ret i7 %a2
}

define <4 x i32> @addsub_combine_constants_use1(<4 x i32> %x, <4 x i32> %y) {
; CHECK-LABEL: @addsub_combine_constants_use1(
; CHECK-NEXT:    [[A1:%.*]] = add <4 x i32> [[X:%.*]], <i32 42, i32 -7, i32 0, i32 -1>
; CHECK-NEXT:    call void @vec_use(<4 x i32> [[A1]])
; CHECK-NEXT:    [[TMP1:%.*]] = sub <4 x i32> [[X]], [[Y:%.*]]
; CHECK-NEXT:    [[A2:%.*]] = add <4 x i32> [[TMP1]], <i32 -58, i32 -6, i32 -1, i32 41>
; CHECK-NEXT:    ret <4 x i32> [[A2]]
;
  %a1 = add <4 x i32> %x, <i32 42, i32 -7, i32 0, i32 -1>
  call void @vec_use(<4 x i32> %a1)
  %s = sub <4 x i32> <i32 -100, i32 1, i32 -1, i32 42>, %y
  %a2 = add nuw <4 x i32> %s, %a1
  ret <4 x i32> %a2
}

define i32 @addsub_combine_constants_use2(i32 %x, i32 %y) {
; CHECK-LABEL: @addsub_combine_constants_use2(
; CHECK-NEXT:    [[S:%.*]] = sub i32 100, [[Y:%.*]]
; CHECK-NEXT:    call void @use(i32 [[S]])
; CHECK-NEXT:    [[TMP1:%.*]] = sub i32 [[X:%.*]], [[Y]]
; CHECK-NEXT:    [[A2:%.*]] = add i32 [[TMP1]], 142
; CHECK-NEXT:    ret i32 [[A2]]
;
  %a1 = add i32 %x, 42
  %s = sub i32 100, %y
  call void @use(i32 %s)
  %a2 = add i32 %a1, %s
  ret i32 %a2
}

; negative test - too many uses

define i32 @addsub_combine_constants_use3(i32 %x, i32 %y) {
; CHECK-LABEL: @addsub_combine_constants_use3(
; CHECK-NEXT:    [[A1:%.*]] = add i32 [[X:%.*]], 42
; CHECK-NEXT:    call void @use(i32 [[A1]])
; CHECK-NEXT:    [[S:%.*]] = sub i32 100, [[Y:%.*]]
; CHECK-NEXT:    call void @use(i32 [[S]])
; CHECK-NEXT:    [[A2:%.*]] = add i32 [[A1]], [[S]]
; CHECK-NEXT:    ret i32 [[A2]]
;
  %a1 = add i32 %x, 42
  call void @use(i32 %a1)
  %s = sub i32 100, %y
  call void @use(i32 %s)
  %a2 = add i32 %a1, %s
  ret i32 %a2
}