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Improve comments in the LSDA somewhat. They can be improved much more.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95707 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-02-09 22:49:16 +00:00
parent c9745049e6
commit 1f8075d7d2
1 changed files with 17 additions and 10 deletions
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27
lib/CodeGen/AsmPrinter/DwarfException.cpp
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@ -34,6 +34,7 @@
#include "llvm/Support/Timer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
using namespace llvm;
DwarfException::DwarfException(raw_ostream &OS, AsmPrinter *A,
@ -868,13 +869,14 @@ void DwarfException::EmitExceptionTable() {
// Offset of the landing pad, counted in 16-byte bundles relative to the
// @LPStart address.
if (!S.PadLabel)
if (!S.PadLabel) {
Asm->OutStreamer.AddComment("Landing pad");
Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
else
} else {
EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
true, true);
EOL("Landing pad");
EOL("Landing pad");
}
// Offset of the first associated action record, relative to the start of
// the action table. This value is biased by 1 (1 indicates the start of
@ -884,35 +886,40 @@ void DwarfException::EmitExceptionTable() {
}
// Emit the Action Table.
EOL("Action Record Table:");
unsigned Iter = 1;
for (SmallVectorImpl<ActionEntry>::const_iterator
I = Actions.begin(), E = Actions.end(); I != E; ++I) {
const ActionEntry &Action = *I;
EOL(Twine("Action Record ") + Twine(Iter++));
// Type Filter
//
// Used by the runtime to match the type of the thrown exception to the
// type of the catch clauses or the types in the exception specification.
EmitSLEB128(Action.ValueForTypeID, "TypeInfo index");
EmitSLEB128(Action.ValueForTypeID, " TypeInfo index");
// Action Record
//
// Self-relative signed displacement in bytes of the next action record,
// or 0 if there is no next action record.
EmitSLEB128(Action.NextAction, "Next action");
EmitSLEB128(Action.NextAction, " Next action");
}
// Emit the Catch TypeInfos.
Iter = TypeInfos.size();
for (std::vector<GlobalVariable *>::const_reverse_iterator
I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
const GlobalVariable *GV = *I;
PrintRelDirective();
if (GV)
if (GV) {
O << *Asm->GetGlobalValueSymbol(GV);
else
EOL(Twine("TypeInfo ") + Twine(Iter--));
} else {
O << "0x0";
EOL("TypeInfo");
EOL("");
}
}
// Emit the Exception Specifications.