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8733a60c96
Extern global merging is good for code-size. There's definitely potential for performance too, but there's one regression in a benchmark that needs investigating, so that's why we enable it only when we optimise for size for now. Patch by Ramakota Reddy and Sjoerd Meijer. Differential Revision: https://reviews.llvm.org/D61947 llvm-svn: 363130
22 lines
669 B
LLVM
22 lines
669 B
LLVM
; RUN: llc %s -o - -verify-machineinstrs | FileCheck %s
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-arm-none-eabi"
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@global0 = dso_local local_unnamed_addr global i32 0, align 4
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@global1 = dso_local local_unnamed_addr global i32 0, align 4
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define dso_local i32 @func() minsize optsize {
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; CHECK-LABEL: @func
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; CHECK: adrp x8, .L_MergedGlobals
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; CHECK-NEXT: add x8, x8, :lo12:.L_MergedGlobals
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; CHECK-NEXT: ldp w9, w8, [x8]
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; CHECK-NEXT: add w0, w8, w9
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; CHECK-NEXT: ret
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entry:
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%0 = load i32, i32* @global0, align 4
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%1 = load i32, i32* @global1, align 4
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%add = add nsw i32 %1, %0
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ret i32 %add
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}
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