llvm-mirror/test/CodeGen/AArch64/global-merge-1.ll
David Green 0430bb0872 [GlobalMerge] Set the alignment on merged global structs
If no alignment is set, the abi/preferred alignment of structs will be
used which may be higher than required. This can lead to extra padding
and in the end an increase in data size.

Differential Revision: https://reviews.llvm.org/D47633

llvm-svn: 334099
2018-06-06 14:48:32 +00:00

32 lines
1.4 KiB
LLVM

; RUN: llc %s -mtriple=aarch64-none-linux-gnu -aarch64-enable-global-merge -o - | FileCheck %s
; RUN: llc %s -mtriple=aarch64-none-linux-gnu -aarch64-enable-global-merge -global-merge-on-external -o - | FileCheck %s
; RUN: llc %s -mtriple=aarch64-linux-gnuabi -aarch64-enable-global-merge -o - | FileCheck %s
; RUN: llc %s -mtriple=aarch64-linux-gnuabi -aarch64-enable-global-merge -global-merge-on-external -o - | FileCheck %s
; RUN: llc %s -mtriple=aarch64-apple-ios -aarch64-enable-global-merge -o - | FileCheck %s --check-prefix=CHECK-APPLE-IOS
; RUN: llc %s -mtriple=aarch64-apple-ios -aarch64-enable-global-merge -global-merge-on-external -o - | FileCheck %s --check-prefix=CHECK-APPLE-IOS
@m = internal global i32 0, align 4
@n = internal global i32 0, align 4
define void @f1(i32 %a1, i32 %a2) {
;CHECK-APPLE-IOS-NOT: adrp
;CHECK-APPLE-IOS: adrp x8, __MergedGlobals@PAGE
;CHECK-APPLE-IOS-NOT: adrp
;CHECK-APPLE-IOS: add x8, x8, __MergedGlobals@PAGEOFF
store i32 %a1, i32* @m, align 4
store i32 %a2, i32* @n, align 4
ret void
}
;CHECK: .type .L_MergedGlobals,@object // @_MergedGlobals
;CHECK: .local .L_MergedGlobals
;CHECK: .comm .L_MergedGlobals,8,4
;CHECK: .set m, .L_MergedGlobals
;CHECK: .set n, .L_MergedGlobals+4
;CHECK-APPLE-IOS: .zerofill __DATA,__bss,__MergedGlobals,8,2 ; @_MergedGlobals
;CHECK-APPLE-IOS-NOT: .set _m, l__MergedGlobals
;CHECK-APPLE-IOS-NOT: .set _n, l__MergedGlobals+4