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llvm/llvm/test/Transforms/Scalarizer/vector-gep.ll 

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes='function(scalarizer)' %s | FileCheck %s

; Check that the scalarizer can handle vector GEPs with scalar indices

@vec = global <4 x ptr> <ptr null, ptr null, ptr null, ptr null>
@index = global i16 1
@ptr = global [4 x i16] [i16 1, i16 2, i16 3, i16 4]
@ptrptr = global ptr null

; constant index
define void @test1() {
; CHECK-LABEL: @test1(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x ptr>, ptr @vec, align 32
; CHECK-NEXT:    [[DOTI0:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 0
; CHECK-NEXT:    [[DOTI01:%.*]] = getelementptr i16, ptr [[DOTI0]], i16 1
; CHECK-NEXT:    [[DOTI1:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 1
; CHECK-NEXT:    [[DOTI12:%.*]] = getelementptr i16, ptr [[DOTI1]], i16 1
; CHECK-NEXT:    [[DOTI2:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 2
; CHECK-NEXT:    [[DOTI23:%.*]] = getelementptr i16, ptr [[DOTI2]], i16 1
; CHECK-NEXT:    [[DOTI3:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 3
; CHECK-NEXT:    [[DOTI34:%.*]] = getelementptr i16, ptr [[DOTI3]], i16 1
; CHECK-NEXT:    ret void
;
bb:
  %0 = load <4 x ptr>, ptr @vec
  %1 = getelementptr i16, <4 x ptr> %0, i16 1

  ret void
}

; non-constant index
define void @test2() {
; CHECK-LABEL: @test2(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x ptr>, ptr @vec, align 32
; CHECK-NEXT:    [[DOTI0:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 0
; CHECK-NEXT:    [[DOTI1:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 1
; CHECK-NEXT:    [[DOTI2:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 2
; CHECK-NEXT:    [[DOTI3:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 3
; CHECK-NEXT:    [[INDEX:%.*]] = load i16, ptr @index, align 2
; CHECK-NEXT:    [[DOTI01:%.*]] = getelementptr i16, ptr [[DOTI0]], i16 [[INDEX]]
; CHECK-NEXT:    [[DOTI12:%.*]] = getelementptr i16, ptr [[DOTI1]], i16 [[INDEX]]
; CHECK-NEXT:    [[DOTI23:%.*]] = getelementptr i16, ptr [[DOTI2]], i16 [[INDEX]]
; CHECK-NEXT:    [[DOTI34:%.*]] = getelementptr i16, ptr [[DOTI3]], i16 [[INDEX]]
; CHECK-NEXT:    ret void
;
bb:
  %0 = load <4 x ptr>, ptr @vec
  %index = load i16, ptr @index
  %1 = getelementptr i16, <4 x ptr> %0, i16 %index

  ret void
}

; Check that the scalarizer can handle vector GEPs with scalar pointer

; constant pointer
define <4 x ptr> @test3_constexpr() {
; CHECK-LABEL: @test3_constexpr(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    ret <4 x ptr> getelementptr (i16, ptr @ptr, <4 x i64> <i64 0, i64 1, i64 2, i64 3>)
;
bb:
  ret <4 x ptr> getelementptr (i16, ptr @ptr, <4 x i64> <i64 0, i64 1, i64 2, i64 3>)
}


define <4 x ptr> @test3_constbase(i16 %idx) {
; CHECK-LABEL: @test3_constbase(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[OFFSET:%.*]] = getelementptr [4 x i16], ptr @ptr, i16 0, i16 [[IDX:%.*]]
; CHECK-NEXT:    [[GEP_I0:%.*]] = getelementptr i16, ptr [[OFFSET]], i16 0
; CHECK-NEXT:    [[GEP_I1:%.*]] = getelementptr i16, ptr [[OFFSET]], i16 1
; CHECK-NEXT:    [[GEP_I2:%.*]] = getelementptr i16, ptr [[OFFSET]], i16 2
; CHECK-NEXT:    [[GEP_I3:%.*]] = getelementptr i16, ptr [[OFFSET]], i16 3
; CHECK-NEXT:    [[GEP_UPTO0:%.*]] = insertelement <4 x ptr> poison, ptr [[GEP_I0]], i64 0
; CHECK-NEXT:    [[GEP_UPTO1:%.*]] = insertelement <4 x ptr> [[GEP_UPTO0]], ptr [[GEP_I1]], i64 1
; CHECK-NEXT:    [[GEP_UPTO2:%.*]] = insertelement <4 x ptr> [[GEP_UPTO1]], ptr [[GEP_I2]], i64 2
; CHECK-NEXT:    [[GEP:%.*]] = insertelement <4 x ptr> [[GEP_UPTO2]], ptr [[GEP_I3]], i64 3
; CHECK-NEXT:    ret <4 x ptr> [[GEP]]
;
bb:
  %offset = getelementptr [4 x i16], ptr @ptr, i16 0, i16 %idx
  %gep = getelementptr i16, ptr %offset, <4 x i16> <i16 0, i16 1, i16 2, i16 3>
  ret <4 x ptr> %gep
}

; Constant pointer with a variable vector offset
define <4 x ptr> @test3_varoffset(<4 x i16> %offset) {
; CHECK-LABEL: @test3_varoffset(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[OFFSET_I0:%.*]] = extractelement <4 x i16> [[OFFSET:%.*]], i64 0
; CHECK-NEXT:    [[GEP_I0:%.*]] = getelementptr i16, ptr @ptr, i16 [[OFFSET_I0]]
; CHECK-NEXT:    [[OFFSET_I1:%.*]] = extractelement <4 x i16> [[OFFSET]], i64 1
; CHECK-NEXT:    [[GEP_I1:%.*]] = getelementptr i16, ptr @ptr, i16 [[OFFSET_I1]]
; CHECK-NEXT:    [[OFFSET_I2:%.*]] = extractelement <4 x i16> [[OFFSET]], i64 2
; CHECK-NEXT:    [[GEP_I2:%.*]] = getelementptr i16, ptr @ptr, i16 [[OFFSET_I2]]
; CHECK-NEXT:    [[OFFSET_I3:%.*]] = extractelement <4 x i16> [[OFFSET]], i64 3
; CHECK-NEXT:    [[GEP_I3:%.*]] = getelementptr i16, ptr @ptr, i16 [[OFFSET_I3]]
; CHECK-NEXT:    [[GEP_UPTO0:%.*]] = insertelement <4 x ptr> poison, ptr [[GEP_I0]], i64 0
; CHECK-NEXT:    [[GEP_UPTO1:%.*]] = insertelement <4 x ptr> [[GEP_UPTO0]], ptr [[GEP_I1]], i64 1
; CHECK-NEXT:    [[GEP_UPTO2:%.*]] = insertelement <4 x ptr> [[GEP_UPTO1]], ptr [[GEP_I2]], i64 2
; CHECK-NEXT:    [[GEP:%.*]] = insertelement <4 x ptr> [[GEP_UPTO2]], ptr [[GEP_I3]], i64 3
; CHECK-NEXT:    ret <4 x ptr> [[GEP]]
;
bb:
  %gep = getelementptr i16, ptr @ptr, <4 x i16> %offset
  ret <4 x ptr> %gep
}

; non-constant pointer
define void @test4() {
; CHECK-LABEL: @test4(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr @ptrptr, align 8
; CHECK-NEXT:    [[DOTI0:%.*]] = getelementptr i16, ptr [[TMP0]], i16 0
; CHECK-NEXT:    [[DOTI1:%.*]] = getelementptr i16, ptr [[TMP0]], i16 1
; CHECK-NEXT:    [[DOTI2:%.*]] = getelementptr i16, ptr [[TMP0]], i16 2
; CHECK-NEXT:    [[DOTI3:%.*]] = getelementptr i16, ptr [[TMP0]], i16 3
; CHECK-NEXT:    ret void
;
bb:
  %0 = load ptr, ptr @ptrptr
  %1 = getelementptr i16, ptr %0, <4 x i16> <i16 0, i16 1, i16 2, i16 3>

  ret void
}

; constant index, inbounds
define void @test5() {
; CHECK-LABEL: @test5(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x ptr>, ptr @vec, align 32
; CHECK-NEXT:    [[DOTI0:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 0
; CHECK-NEXT:    [[DOTI01:%.*]] = getelementptr inbounds i16, ptr [[DOTI0]], i16 1
; CHECK-NEXT:    [[DOTI1:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 1
; CHECK-NEXT:    [[DOTI12:%.*]] = getelementptr inbounds i16, ptr [[DOTI1]], i16 1
; CHECK-NEXT:    [[DOTI2:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 2
; CHECK-NEXT:    [[DOTI23:%.*]] = getelementptr inbounds i16, ptr [[DOTI2]], i16 1
; CHECK-NEXT:    [[DOTI3:%.*]] = extractelement <4 x ptr> [[TMP0]], i64 3
; CHECK-NEXT:    [[DOTI34:%.*]] = getelementptr inbounds i16, ptr [[DOTI3]], i16 1
; CHECK-NEXT:    ret void
;
bb:
  %0 = load <4 x ptr>, ptr @vec
  %1 = getelementptr inbounds i16, <4 x ptr> %0, i16 1

  ret void
}