derek.holloway
7502bf64a4
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61 lines
2.6 KiB
LLVM
61 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
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; RUN: opt < %s -passes=globalopt -S | FileCheck %s
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target datalayout = "p:16:32:64" ; 16-bit pointers with 32-bit ABI alignment and 64-bit preferred alignmentt
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@a = internal externally_initialized global [3 x [7 x ptr]] zeroinitializer, align 16
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; PR50253
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; The alignments are correct initially, but they should be updated
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; after transforming the global. The stored global pointer array retains
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; its original "align 16", so access to element N into the new array
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; should be offset by the ABI alignment of N pointers.
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; Loaded globals are split into individual pointers and use the
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; preferred alignment from the datalayout.
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;.
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; CHECK: @[[A_4:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 8
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; CHECK: @[[A_5:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 8
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; CHECK: @[[A_6:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 16
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; CHECK: @[[A_7:[a-zA-Z0-9_$"\\.-]+]] = internal unnamed_addr externally_initialized global ptr null, align 8
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;.
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define ptr @reduce_align_0() {
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; CHECK-LABEL: @reduce_align_0(
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; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.4, align 8
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; CHECK-NEXT: ret ptr [[X]]
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;
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%x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 0), align 8
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store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 0), align 4
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ret ptr %x
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}
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define ptr @reduce_align_1() {
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; CHECK-LABEL: @reduce_align_1(
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; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.5, align 8
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; CHECK-NEXT: ret ptr [[X]]
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;
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%x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 1), align 4
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store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 1), align 16
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ret ptr %x
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}
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define ptr @reduce_align_2() {
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; CHECK-LABEL: @reduce_align_2(
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; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.6, align 16
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; CHECK-NEXT: ret ptr [[X]]
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;
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%x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 2), align 16
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store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 2), align 4
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ret ptr %x
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}
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define ptr @reduce_align_3() {
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; CHECK-LABEL: @reduce_align_3(
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; CHECK-NEXT: [[X:%.*]] = load ptr, ptr @a.7, align 8
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; CHECK-NEXT: ret ptr [[X]]
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;
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%x = load ptr, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 2, i64 3), align 4
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store ptr null, ptr getelementptr inbounds ([3 x [7 x ptr]], ptr @a, i64 0, i64 1, i64 3), align 8
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ret ptr %x
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}
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