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https://github.com/c64scene-ar/llvm-6502.git
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enhance codegen to put 16-bit character strings into the
__TEXT,__ustring section on darwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78068 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -224,6 +224,7 @@ public:
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class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
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const MCSection *CStringSection;
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const MCSection *UStringSection;
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const MCSection *TextCoalSection;
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const MCSection *ConstTextCoalSection;
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const MCSection *ConstDataCoalSection;
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@ -593,11 +593,13 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
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SectionKind::getDataRel());
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CStringSection = getOrCreateSection("\t.cstring", true,
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SectionKind::getMergeable1ByteCString());
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SectionKind::getMergeable1ByteCString());
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UStringSection = getOrCreateSection("__TEXT,__ustring", false,
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SectionKind::getMergeable2ByteCString());
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FourByteConstantSection = getOrCreateSection("\t.literal4\n", true,
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SectionKind::getMergeableConst4());
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SectionKind::getMergeableConst4());
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EightByteConstantSection = getOrCreateSection("\t.literal8\n", true,
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SectionKind::getMergeableConst8());
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SectionKind::getMergeableConst8());
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// ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
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// to using it in -static mode.
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@ -704,18 +706,15 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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}
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// FIXME: Alignment check should be handled by section classifier.
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if (Kind.isMergeable1ByteCString()) {
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Constant *C = cast<GlobalVariable>(GV)->getInitializer();
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const Type *Ty = cast<ArrayType>(C->getType())->getElementType();
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const TargetData &TD = *TM.getTargetData();
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unsigned Size = TD.getTypeAllocSize(Ty);
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if (Size) {
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unsigned Align = TD.getPreferredAlignment(cast<GlobalVariable>(GV));
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if (Align <= 32)
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if (Kind.isMergeable1ByteCString() ||
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Kind.isMergeable2ByteCString()) {
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if (TM.getTargetData()->getPreferredAlignment(
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cast<GlobalVariable>(GV)) < 32) {
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if (Kind.isMergeable1ByteCString())
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return CStringSection;
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assert(Kind.isMergeable2ByteCString());
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return UStringSection;
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}
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return ReadOnlySection;
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}
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if (Kind.isMergeableConst()) {
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@ -725,11 +724,10 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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return EightByteConstantSection;
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if (Kind.isMergeableConst16() && SixteenByteConstantSection)
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return SixteenByteConstantSection;
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return ReadOnlySection; // .const
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}
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// FIXME: ROData -> const in -static mode that is relocatable but they happen
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// by the static linker. Why not mergeable?
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// Otherwise, if it is readonly, but not something we can specially optimize,
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// just drop it in .const.
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if (Kind.isReadOnly())
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return ReadOnlySection;
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@ -101,7 +101,7 @@
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@G8 = constant [4 x i16] [ i16 1, i16 2, i16 3, i16 0 ]
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; DARWIN: .const
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; DARWIN: .section __TEXT,__ustring
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; DARWIN: .globl _G8
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; DARWIN: _G8:
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@ -111,7 +111,7 @@
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@G9 = constant [4 x i32] [ i32 1, i32 2, i32 3, i32 0 ]
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; ARWIN: .const [[ already in const section]]
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; DARWIN: .const
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; DARWIN: .globl _G9
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; DARWIN: _G9:
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