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Move DataLayout back to the TargetMachine from TargetSubtargetInfo

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derived classes.

Since global data alignment, layout, and mangling is often based on the
DataLayout, move it to the TargetMachine. This ensures that global
data is going to be layed out and mangled consistently if the subtarget
changes on a per function basis. Prior to this all targets(*) have
had subtarget dependent code moved out and onto the TargetMachine.

*One target hasn't been migrated as part of this change: R600. The
R600 port has, as a subtarget feature, the size of pointers and
this affects global data layout. I've currently hacked in a FIXME
to enable progress, but the port needs to be updated to either pass
the 64-bitness to the TargetMachine, or fix the DataLayout to
avoid subtarget dependent features.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227113 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2015-01-26 19:03:15 +00:00
parent cce3c83917
commit 04bcc11905
97 changed files with 456 additions and 455 deletions
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14
lib/CodeGen/TargetLoweringObjectFileImpl.cpp
View File

@ -73,10 +73,9 @@ void TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer,
Flags,
SectionKind::getDataRel(),
0, Label->getName());
unsigned Size = TM.getSubtargetImpl()->getDataLayout()->getPointerSize();
unsigned Size = TM.getDataLayout()->getPointerSize();
Streamer.SwitchSection(Sec);
Streamer.EmitValueToAlignment(
TM.getSubtargetImpl()->getDataLayout()->getPointerABIAlignment());
Streamer.EmitValueToAlignment(TM.getDataLayout()->getPointerABIAlignment());
Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject);
const MCExpr *E = MCConstantExpr::Create(Size, getContext());
Streamer.EmitELFSize(Label, E);
@ -285,8 +284,7 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
// FIXME: this is getting the alignment of the character, not the
// alignment of the global!
unsigned Align =
TM.getSubtargetImpl()->getDataLayout()->getPreferredAlignment(
cast<GlobalVariable>(GV));
TM.getDataLayout()->getPreferredAlignment(cast<GlobalVariable>(GV));
const char *SizeSpec = ".rodata.str1.";
if (Kind.isMergeable2ByteCString())
@ -591,16 +589,14 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
// FIXME: Alignment check should be handled by section classifier.
if (Kind.isMergeable1ByteCString() &&
TM.getSubtargetImpl()->getDataLayout()->getPreferredAlignment(
cast<GlobalVariable>(GV)) < 32)
TM.getDataLayout()->getPreferredAlignment(cast<GlobalVariable>(GV)) < 32)
return CStringSection;
// Do not put 16-bit arrays in the UString section if they have an
// externally visible label, this runs into issues with certain linker
// versions.
if (Kind.isMergeable2ByteCString() && !GV->hasExternalLinkage() &&
TM.getSubtargetImpl()->getDataLayout()->getPreferredAlignment(
cast<GlobalVariable>(GV)) < 32)
TM.getDataLayout()->getPreferredAlignment(cast<GlobalVariable>(GV)) < 32)
return UStringSection;
// With MachO only variables whose corresponding symbol starts with 'l' or