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Add support for mergeable sections back into the XCore backend.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79368 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Osborne 2009-08-18 21:14:31 +00:00
parent 3731604f1f
commit 1123135dbf
3 changed files with 20 additions and 7 deletions
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23
lib/Target/XCore/XCoreTargetObjectFile.cpp
View File

@ -28,11 +28,24 @@ void XCoreTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM){
MCSectionXCore::SHF_DP_SECTION,
SectionKind::getBSS(), false, getContext());
// For now, disable lowering of mergable sections, just drop everything into
// ReadOnly.
MergeableConst4Section = 0;
MergeableConst8Section = 0;
MergeableConst16Section = 0;
MergeableConst4Section =
MCSectionXCore::Create(".cp.rodata.cst4", MCSectionELF::SHT_PROGBITS,
MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE |
MCSectionXCore::SHF_CP_SECTION,
SectionKind::getMergeableConst4(), false,
getContext());
MergeableConst8Section =
MCSectionXCore::Create(".cp.rodata.cst8", MCSectionELF::SHT_PROGBITS,
MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE |
MCSectionXCore::SHF_CP_SECTION,
SectionKind::getMergeableConst8(), false,
getContext());
MergeableConst16Section =
MCSectionXCore::Create(".cp.rodata.cst16", MCSectionELF::SHT_PROGBITS,
MCSectionELF::SHF_ALLOC | MCSectionELF::SHF_MERGE |
MCSectionXCore::SHF_CP_SECTION,
SectionKind::getMergeableConst16(), false,
getContext());
// TLS globals are lowered in the backend to arrays indexed by the current
// thread id. After lowering they require no special handling by the linker

2
test/CodeGen/XCore/constants.ll
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@ -1,6 +1,6 @@
; RUN: llvm-as < %s | llc -march=xcore -mcpu=xs1b-generic | FileCheck %s
; CHECK: .section .cp.rodata,"ac",@progbits
; CHECK: .section .cp.rodata.cst4,"aMc",@progbits,4
; CHECK: .LCPI1_0:
; CHECK: .long 12345678
; CHECK: f:

2
test/CodeGen/XCore/globals.ll
View File

@ -68,7 +68,7 @@ entry:
; CHECK: G2:
@G3 = constant i32 9401
; CHECK: .section .cp.rodata,"ac",@progbits
; CHECK: .section .cp.rodata.cst4,"aMc",@progbits,4
; CHECK: G3:
@G4 = global i32* @G1