extract-fneg-insert.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=vector-combine -S -mtriple=x86_64-- -mattr=SSE2 | FileCheck %s --check-prefixes=CHECK,SSE
; RUN: opt < %s -passes=vector-combine -S -mtriple=x86_64-- -mattr=AVX2 | FileCheck %s --check-prefixes=CHECK,AVX

declare void @use(float)

define <4 x float> @ext0_v4f32(<4 x float> %x, <4 x float> %y) {
; CHECK-LABEL: @ext0_v4f32(
; CHECK-NEXT:    [[E:%.*]] = extractelement <4 x float> [[X:%.*]], i32 0
; CHECK-NEXT:    [[N:%.*]] = fneg float [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <4 x float> [[Y:%.*]], float [[N]], i32 0
; CHECK-NEXT:    ret <4 x float> [[R]]
;
  %e = extractelement <4 x float> %x, i32 0
  %n = fneg float %e
  %r = insertelement <4 x float> %y, float %n, i32 0
  ret <4 x float> %r
}

; Eliminating extract/insert is profitable.

define <4 x float> @ext2_v4f32(<4 x float> %x, <4 x float> %y) {
; CHECK-LABEL: @ext2_v4f32(
; CHECK-NEXT:    [[E:%.*]] = extractelement <4 x float> [[X:%.*]], i32 2
; CHECK-NEXT:    [[N:%.*]] = fneg float [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <4 x float> [[Y:%.*]], float [[N]], i32 2
; CHECK-NEXT:    ret <4 x float> [[R]]
;
  %e = extractelement <4 x float> %x, i32 2
  %n = fneg float %e
  %r = insertelement <4 x float> %y, float %n, i32 2
  ret <4 x float> %r
}

; Eliminating extract/insert is still profitable. Flags propagate.

define <2 x double> @ext1_v2f64(<2 x double> %x, <2 x double> %y) {
; CHECK-LABEL: @ext1_v2f64(
; CHECK-NEXT:    [[E:%.*]] = extractelement <2 x double> [[X:%.*]], i32 1
; CHECK-NEXT:    [[N:%.*]] = fneg nsz double [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x double> [[Y:%.*]], double [[N]], i32 1
; CHECK-NEXT:    ret <2 x double> [[R]]
;
  %e = extractelement <2 x double> %x, i32 1
  %n = fneg nsz double %e
  %r = insertelement <2 x double> %y, double %n, i32 1
  ret <2 x double> %r
}

define <8 x float> @ext7_v8f32(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @ext7_v8f32(
; CHECK-NEXT:    [[E:%.*]] = extractelement <8 x float> [[X:%.*]], i32 7
; CHECK-NEXT:    [[N:%.*]] = fneg float [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <8 x float> [[Y:%.*]], float [[N]], i32 7
; CHECK-NEXT:    ret <8 x float> [[R]]
;
  %e = extractelement <8 x float> %x, i32 7
  %n = fneg float %e
  %r = insertelement <8 x float> %y, float %n, i32 7
  ret <8 x float> %r
}

define <8 x float> @ext7_v8f32_use1(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @ext7_v8f32_use1(
; CHECK-NEXT:    [[E:%.*]] = extractelement <8 x float> [[X:%.*]], i32 5
; CHECK-NEXT:    call void @use(float [[E]])
; CHECK-NEXT:    [[N:%.*]] = fneg float [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <8 x float> [[Y:%.*]], float [[N]], i32 5
; CHECK-NEXT:    ret <8 x float> [[R]]
;
  %e = extractelement <8 x float> %x, i32 5
  call void @use(float %e)
  %n = fneg float %e
  %r = insertelement <8 x float> %y, float %n, i32 5
  ret <8 x float> %r
}

define <8 x float> @ext7_v8f32_use2(<8 x float> %x, <8 x float> %y) {
; CHECK-LABEL: @ext7_v8f32_use2(
; CHECK-NEXT:    [[E:%.*]] = extractelement <8 x float> [[X:%.*]], i32 3
; CHECK-NEXT:    [[N:%.*]] = fneg float [[E]]
; CHECK-NEXT:    call void @use(float [[N]])
; CHECK-NEXT:    [[R:%.*]] = insertelement <8 x float> [[Y:%.*]], float [[N]], i32 3
; CHECK-NEXT:    ret <8 x float> [[R]]
;
  %e = extractelement <8 x float> %x, i32 3
  %n = fneg float %e
  call void @use(float %n)
  %r = insertelement <8 x float> %y, float %n, i32 3
  ret <8 x float> %r
}

define <2 x double> @ext_index_var_v2f64(<2 x double> %x, <2 x double> %y, i32 %index) {
; CHECK-LABEL: @ext_index_var_v2f64(
; CHECK-NEXT:    [[E:%.*]] = extractelement <2 x double> [[X:%.*]], i32 [[INDEX:%.*]]
; CHECK-NEXT:    [[N:%.*]] = fneg nsz double [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x double> [[Y:%.*]], double [[N]], i32 [[INDEX]]
; CHECK-NEXT:    ret <2 x double> [[R]]
;
  %e = extractelement <2 x double> %x, i32 %index
  %n = fneg nsz double %e
  %r = insertelement <2 x double> %y, double %n, i32 %index
  ret <2 x double> %r
}

define <2 x double> @ext1_v2f64_ins0(<2 x double> %x, <2 x double> %y) {
; CHECK-LABEL: @ext1_v2f64_ins0(
; CHECK-NEXT:    [[E:%.*]] = extractelement <2 x double> [[X:%.*]], i32 1
; CHECK-NEXT:    [[N:%.*]] = fneg nsz double [[E]]
; CHECK-NEXT:    [[R:%.*]] = insertelement <2 x double> [[Y:%.*]], double [[N]], i32 0
; CHECK-NEXT:    ret <2 x double> [[R]]
;
  %e = extractelement <2 x double> %x, i32 1
  %n = fneg nsz double %e
  %r = insertelement <2 x double> %y, double %n, i32 0
  ret <2 x double> %r
}