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Change SectionKind to be a property that is true of a *section*, it

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should have no state that is specific to particular globals in the
section.  In this case, it means the removal of the "isWeak" and
"ExplicitSection" bits.  MCSection uses the new form of SectionKind.

To handle isWeak, I introduced a new SectionInfo class, which is
SectionKind + isWeak, and it is used by the part of the code generator
that does classification of a specific global.

The ExplicitSection disappears.  It is moved onto MCSection as a new
"IsDirective" bit.  Since the Name of a section is either a section
or directive, it makes sense to keep this bit in MCSection.  Ultimately
the creator of MCSection should canonicalize (e.g.) .text to whatever
the actual section is.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77803 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-08-01 21:11:14 +00:00
parent d7f10d3361
commit 968ff11967
11 changed files with 242 additions and 191 deletions
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17
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@@ -151,7 +151,7 @@ void AsmPrinter::SwitchToSection(const MCSection *NS) {
// If section is named we need to switch into it via special '.section'
// directive and also append funky flags. Otherwise - section name is just
// some magic assembler directive.
if (NS->getKind().hasExplicitSection()) {
if (!NS->isDirective()) {
SmallString<32> FlagsStr;
getObjFileLowering().getSectionFlagsAsString(NS->getKind(), FlagsStr);
@@ -336,16 +336,16 @@ void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
SectionKind Kind;
switch (CPE.getRelocationInfo()) {
default: llvm_unreachable("Unknown section kind");
case 2: Kind = SectionKind::get(SectionKind::ReadOnlyWithRel, false); break;
case 2: Kind = SectionKind::get(SectionKind::ReadOnlyWithRel); break;
case 1:
Kind = SectionKind::get(SectionKind::ReadOnlyWithRelLocal,false);
Kind = SectionKind::get(SectionKind::ReadOnlyWithRelLocal);
break;
case 0:
switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) {
case 4: Kind = SectionKind::get(SectionKind::MergeableConst4,false); break;
case 8: Kind = SectionKind::get(SectionKind::MergeableConst8,false); break;
case 16: Kind = SectionKind::get(SectionKind::MergeableConst16,false);break;
default: Kind = SectionKind::get(SectionKind::MergeableConst,false); break;
case 4: Kind = SectionKind::get(SectionKind::MergeableConst4); break;
case 8: Kind = SectionKind::get(SectionKind::MergeableConst8); break;
case 16: Kind = SectionKind::get(SectionKind::MergeableConst16);break;
default: Kind = SectionKind::get(SectionKind::MergeableConst); break;
}
}
@@ -427,8 +427,7 @@ void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
bool JTInDiffSection = false;
if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
!JumpTableDataSection ||
FuncSection->getKind().isWeak()) {
!JumpTableDataSection || F->isWeakForLinker()) {
// In PIC mode, we need to emit the jump table to the same section as the
// function body itself, otherwise the label differences won't make sense.
// We should also do if the section name is NULL or function is declared in