6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-21 18:29:45 +00:00
Code Issues Projects Releases Wiki Activity

Make global aliases have symbol size equal to their type

Browse Source 
This is mainly for the benefit of GlobalMerge, so that an alias into a
MergedGlobals variable has the same size as the original non-merged
variable.

Differential Revision: http://reviews.llvm.org/D10837


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242520 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
John Brawn 2015-07-17 12:12:03 +00:00
parent fe6ad9692a
commit 591adee23b
4 changed files with 34 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
View File

@ -1111,6 +1111,16 @@ bool AsmPrinter::doFinalization(Module &M) {
// Emit the directives as assignments aka .set:
OutStreamer->EmitAssignment(Name, lowerConstant(Alias.getAliasee()));
// Set the size of the alias symbol if we can, as otherwise the alias gets
// the size of the aliasee which may not be correct e.g. if the alias is of
// a member of a struct.
if (MAI->hasDotTypeDotSizeDirective() && Alias.getValueType()->isSized()) {
const DataLayout &DL = M.getDataLayout();
uint64_t Size = DL.getTypeAllocSize(Alias.getValueType());
OutStreamer->emitELFSize(cast<MCSymbolELF>(Name),
MCConstantExpr::create(Size, OutContext));
}
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();

3
test/CodeGen/AArch64/global-merge-2.ll
View File

@ -35,10 +35,13 @@ define void @g1(i32 %a1, i32 %a2) {
;CHECK: .globl x
;CHECK: x = _MergedGlobals_x
;CHECK: .size x, 4
;CHECK: .globl y
;CHECK: y = _MergedGlobals_x+4
;CHECK: .size y, 4
;CHECK: .globl z
;CHECK: z = _MergedGlobals_x+8
;CHECK: .size z, 4
;CHECK-APPLE-IOS: .globl __MergedGlobals_x ; @_MergedGlobals_x
;CHECK-APPLE-IOS: .zerofill __DATA,__common,__MergedGlobals_x,12,3

2
test/CodeGen/AArch64/global-merge-3.ll
View File

@ -42,8 +42,10 @@ define void @f1(i32 %a1, i32 %a2, i32 %a3) {
;CHECK: .globl x
;CHECK: x = _MergedGlobals_x+4
;CHECK: .size x, 4000
;CHECK: .globl y
;CHECK: y = _MergedGlobals_y
;CHECK: .size y, 4000
;CHECK-APPLE-IOS:.globl _x
;CHECK-APPLE-IOS: _x = __MergedGlobals_x+4

19
test/CodeGen/ARM/aliases.ll
View File

@ -2,19 +2,34 @@
; CHECK: .globl test
; CHECK: .globl structvar
; CHECK: .size structvar, 8
; CHECK: .globl foo1
; CHECK: foo1 = bar
; CHECK: .size foo1, 4
; CHECK: .globl foo2
; CHECK: foo2 = bar
; CHECK: .size foo2, 4
; CHECK: .weak bar_f
; CHECK: bar_f = foo_f
; CHECK: bar_i = bar
; CHECK: .size bar_i, 4
; CHECK: .globl A
; CHECK: A = bar
; CHECK: .size A, 8
; CHECK: .globl elem0
; CHECK: elem0 = structvar
; CHECK: .size elem0, 4
; CHECK: .globl elem1
; CHECK: elem1 = structvar+4
; CHECK: .size elem1, 4
@bar = global i32 42
@foo1 = alias i32* @bar
@ -31,6 +46,10 @@ define i32 @foo_f() {
@A = alias bitcast (i32* @bar to i64*)
@structvar = global {i32, i32} {i32 1, i32 2}
@elem0 = alias getelementptr({i32, i32}, {i32, i32}* @structvar, i32 0, i32 0)
@elem1 = alias getelementptr({i32, i32}, {i32, i32}* @structvar, i32 0, i32 1)
define i32 @test() {
entry:
%tmp = load i32, i32* @foo1