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Add a DIELoc class to cover the DW_FORM_exprloc set of expressions

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alongside DIEBlock and replace uses accordingly. Use DW_FORM_exprloc
in DWARF4 and later code. Update testcases.

Adding a DIELoc instead of using extra forms inside DIEBlock so
that we can keep location expressions separate from other uses. No
direct use at the moment, however, it's not a lot of code and
using a separately named class keeps it somewhat more obvious
what's going on in various locations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201481 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2014-02-16 08:46:55 +00:00
parent 268e96a8a6
commit 0cefb0ecbc
8 changed files with 184 additions and 77 deletions
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55
lib/CodeGen/AsmPrinter/DIE.cpp
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@@ -418,6 +418,61 @@ void DIETypeSignature::print(raw_ostream &O) const {
void DIETypeSignature::dump() const { print(dbgs()); }
#endif
//===----------------------------------------------------------------------===//
// DIELoc Implementation
//===----------------------------------------------------------------------===//
/// ComputeSize - calculate the size of the location expression.
///
unsigned DIELoc::ComputeSize(AsmPrinter *AP) {
if (!Size) {
const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
for (unsigned i = 0, N = Values.size(); i < N; ++i)
Size += Values[i]->SizeOf(AP, AbbrevData[i].getForm());
}
return Size;
}
/// EmitValue - Emit location data.
///
void DIELoc::EmitValue(AsmPrinter *Asm, dwarf::Form Form) const {
switch (Form) {
default: llvm_unreachable("Improper form for block");
case dwarf::DW_FORM_block1: Asm->EmitInt8(Size); break;
case dwarf::DW_FORM_block2: Asm->EmitInt16(Size); break;
case dwarf::DW_FORM_block4: Asm->EmitInt32(Size); break;
case dwarf::DW_FORM_block:
case dwarf::DW_FORM_exprloc:
Asm->EmitULEB128(Size); break;
}
const SmallVectorImpl<DIEAbbrevData> &AbbrevData = Abbrev.getData();
for (unsigned i = 0, N = Values.size(); i < N; ++i)
Values[i]->EmitValue(Asm, AbbrevData[i].getForm());
}
/// SizeOf - Determine size of location data in bytes.
///
unsigned DIELoc::SizeOf(AsmPrinter *AP, dwarf::Form Form) const {
switch (Form) {
case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
case dwarf::DW_FORM_block4: return Size + sizeof(int32_t);
case dwarf::DW_FORM_block:
case dwarf::DW_FORM_exprloc:
return Size + MCAsmInfo::getULEB128Size(Size);
default: llvm_unreachable("Improper form for block");
}
}
#ifndef NDEBUG
void DIELoc::print(raw_ostream &O) const {
O << "ExprLoc: ";
DIE::print(O, 5);
}
#endif
//===----------------------------------------------------------------------===//
// DIEBlock Implementation
//===----------------------------------------------------------------------===//