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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/Support/Timer.h"
#include "llvm/ADT/SmallString.h" #include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h" #include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
using namespace llvm; using namespace llvm;
DwarfException::DwarfException(raw_ostream &OS, AsmPrinter *A, 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 // Offset of the landing pad, counted in 16-byte bundles relative to the
// @LPStart address. // @LPStart address.
if (!S.PadLabel) if (!S.PadLabel) {
Asm->OutStreamer.AddComment("Landing pad");
Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/); Asm->OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
else } else {
EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount, EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
true, true); true, true);
EOL("Landing pad");
EOL("Landing pad"); }
// Offset of the first associated action record, relative to the start of // 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 // 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. // Emit the Action Table.
EOL("Action Record Table:");
unsigned Iter = 1;
for (SmallVectorImpl<ActionEntry>::const_iterator for (SmallVectorImpl<ActionEntry>::const_iterator
I = Actions.begin(), E = Actions.end(); I != E; ++I) { I = Actions.begin(), E = Actions.end(); I != E; ++I) {
const ActionEntry &Action = *I; const ActionEntry &Action = *I;
EOL(Twine("Action Record ") + Twine(Iter++));
// Type Filter // Type Filter
// //
// Used by the runtime to match the type of the thrown exception to the // 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. // type of the catch clauses or the types in the exception specification.
EmitSLEB128(Action.ValueForTypeID, "TypeInfo index"); EmitSLEB128(Action.ValueForTypeID, " TypeInfo index");
// Action Record // Action Record
// //
// Self-relative signed displacement in bytes of the next action record, // Self-relative signed displacement in bytes of the next action record,
// or 0 if there is no 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. // Emit the Catch TypeInfos.
Iter = TypeInfos.size();
for (std::vector<GlobalVariable *>::const_reverse_iterator for (std::vector<GlobalVariable *>::const_reverse_iterator
I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) { I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
const GlobalVariable *GV = *I; const GlobalVariable *GV = *I;
PrintRelDirective(); PrintRelDirective();
if (GV) if (GV) {
O << *Asm->GetGlobalValueSymbol(GV); O << *Asm->GetGlobalValueSymbol(GV);
else EOL(Twine("TypeInfo ") + Twine(Iter--));
} else {
O << "0x0"; O << "0x0";
EOL("");
EOL("TypeInfo"); }
} }
// Emit the Exception Specifications. // Emit the Exception Specifications.