test/Transforms/InferAlignment/gep-array.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -passes=infer-alignment -S < %s | FileCheck %s

; ------------------------------------------------------------------------------
; Array of pair
; ------------------------------------------------------------------------------

; Check that we improve the alignment information.
; The base pointer is 16-byte aligned and we access the field at offsets of 8
; bytes.
; Every element in the @array.simple array is 16-byte aligned so any access from
; the following gep is 8-byte aligned.

%pair.simple = type { ptr, i32 }
@array.simple = global [4 x %pair.simple] zeroinitializer, align 16

define void @simple_pair(i64 %idx) {
; CHECK-LABEL: define void @simple_pair
; CHECK-SAME: (i64 [[IDX:%.*]]) {
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds [4 x %pair.simple], ptr @array.simple, i64 0, i64 [[IDX]], i32 1
; CHECK-NEXT:    [[RES:%.*]] = load i32, ptr [[GEP]], align 8
; CHECK-NEXT:    store i32 0, ptr [[GEP]], align 8
; CHECK-NEXT:    ret void
;
  %gep = getelementptr inbounds [4 x %pair.simple], ptr @array.simple, i64 0, i64 %idx, i32 1

  %res = load i32, ptr %gep, align 1
  store i32 0, ptr %gep, align 1

  ret void
}

; ------------------------------------------------------------------------------
; Array of pair of arrays
; ------------------------------------------------------------------------------

%pair.array = type { [3 x i32], [3 x i32] }
@array.array = internal global [3 x %pair.array] zeroinitializer

define void @load_nested() {
; CHECK-LABEL: define void @load_nested() {
; CHECK-NEXT:    [[X_0:%.*]] = load i32, ptr @array.array, align 16
; CHECK-NEXT:    [[X_1:%.*]] = load i32, ptr getelementptr inbounds ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 1), align 4
; CHECK-NEXT:    [[X_2:%.*]] = load i32, ptr getelementptr inbounds ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 2), align 8
; CHECK-NEXT:    [[X_3:%.*]] = load i32, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 3), align 4
; CHECK-NEXT:    [[X_4:%.*]] = load i32, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 4), align 16
; CHECK-NEXT:    ret void
;
  %x.0 =  load i32, ptr @array.array, align 4
  %x.1 =  load i32, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 1), align 4
  %x.2 =  load i32, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 2), align 4
  %x.3 =  load i32, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 3), align 4
  %x.4 =  load i32, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 4), align 4
  ret void
}

define void @store_nested() {
; CHECK-LABEL: define void @store_nested() {
; CHECK-NEXT:    store i32 1, ptr @array.array, align 16
; CHECK-NEXT:    store i32 1, ptr getelementptr inbounds ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 1), align 4
; CHECK-NEXT:    store i32 1, ptr getelementptr inbounds ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 2), align 8
; CHECK-NEXT:    store i32 1, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 3), align 4
; CHECK-NEXT:    store i32 1, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 4), align 16
; CHECK-NEXT:    ret void
;
  store i32 1, ptr @array.array, align 4
  store i32 1, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 1), align 4
  store i32 1, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 2), align 4
  store i32 1, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 3), align 4
  store i32 1, ptr getelementptr ([3 x %pair.array], ptr @array.array, i64 0, i64 0, i32 0, i64 4), align 4
  ret void
}