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Add another (and hopefully the last) exception case, where once we recalculate

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the alignment requirement, if it no longer makes the TType base offset overflow
into extra bytes, then we need to pad to those bytes ourselves.

llvm-svn: 97196
This commit is contained in:
Bill Wendling 2010-02-26 00:43:54 +00:00
parent 6c6c5e70e3
commit 173d797171
1 changed files with 11 additions and 3 deletions
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14
lib/CodeGen/AsmPrinter/DwarfException.cpp
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@ -762,9 +762,16 @@ void DwarfException::EmitExceptionTable() {
SizeAlign -= TTypeBaseOverflow;
}
if (!TTypeBaseOverflow || SizeAlign != 0)
EmitULEB128(Offset, "@TType base offset");
else
if (!TTypeBaseOverflow) {
EmitULEB128(TTypeBaseOffset + SizeAlign, "@TType base offset");
} else if (SizeAlign != 0) {
// If the new "offset + alignment" size doesn't require extra the same
// extra padding that the original one did, then we need to insert that
// padding ourselves.
EmitULEB128(TTypeBaseOffset + SizeAlign, "@TType base offset",
MCAsmInfo::getULEB128Size(TTypeBaseOffset + SizeAlign) !=
OffsetSize ? TTypeBaseOverflow : 0);
} else {
// If adding the extra padding to this offset causes it to buffer to the
// size of the padding needed, then we should perform the padding here and
// not at the call site table below. E.g. if we have this:
@ -790,6 +797,7 @@ void DwarfException::EmitExceptionTable() {
//
// and not with padding on the "Call site table length" entry.
EmitULEB128(TTypeBaseOffset, "@TType base offset", TTypeBaseOverflow);
}
}
// SjLj Exception handling