1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
2 ; RUN: opt < %s -passes=globalopt -S | FileCheck %s
4 target datalayout = "p:16:32:64" ; 16-bit pointers with 32-bit ABI alignment and 64-bit preferred alignmentt
6 @a = internal externally_initialized global [3 x [7 x ptr]] zeroinitializer, align 16
9 ; The alignments are correct initially, but they should be updated
10 ; after transforming the global. The stored global pointer array retains
11 ; its original "align 16", so access to element N into the new array
12 ; should be offset by the ABI alignment of N pointers.
13 ; Loaded globals are split into individual pointers and use the
14 ; preferred alignment from the datalayout.
17 ; CHECK: @[[A_4:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 8
18 ; CHECK: @[[A_5:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 8
19 ; CHECK: @[[A_6:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 16
20 ; CHECK: @[[A_7:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 8
22 define ptr @reduce_align_0() {
23 ; CHECK-LABEL: @reduce_align_0(
24 ; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.4, align 8
25 ; CHECK-NEXT: ret ptr [[X]]
27 %x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 0), align 8
28 store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 0), align 4
32 define ptr @reduce_align_1() {
33 ; CHECK-LABEL: @reduce_align_1(
34 ; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.5, align 8
35 ; CHECK-NEXT: ret ptr [[X]]
37 %x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 1), align 4
38 store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 1), align 16
42 define ptr @reduce_align_2() {
43 ; CHECK-LABEL: @reduce_align_2(
44 ; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.6, align 16
45 ; CHECK-NEXT: ret ptr [[X]]
47 %x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 2), align 16
48 store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 2), align 4
52 define ptr @reduce_align_3() {
53 ; CHECK-LABEL: @reduce_align_3(
54 ; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.7, align 8
55 ; CHECK-NEXT: ret ptr [[X]]
57 %x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 3), align 4
58 store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 3), align 8