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simplify some code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100350 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-04-04 20:10:41 +00:00
parent ca6190b108
commit 9be4913136
3 changed files with 25 additions and 21 deletions
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9
include/llvm/CodeGen/AsmPrinter.h
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@ -334,6 +334,15 @@ namespace llvm {
void EmitULEB128(unsigned Value, const char *Desc = 0, void EmitULEB128(unsigned Value, const char *Desc = 0,
unsigned PadTo = 0) const; unsigned PadTo = 0) const;
/// EmitCFAByte - Emit a .byte 42 directive for a DW_CFA_xxx value.
void EmitCFAByte(unsigned Val) const;
/// EmitEncodingByte - Emit a .byte 42 directive that corresponds to an
/// encoding. If verbose assembly output is enabled, we output comments
/// describing the encoding. Desc is a string saying what the encoding is
/// specifying (e.g. "LSDA").
void EmitEncodingByte(unsigned Val, const char *Desc = 0);
//===------------------------------------------------------------------===// //===------------------------------------------------------------------===//
// Inline Asm Support // Inline Asm Support
//===------------------------------------------------------------------===// //===------------------------------------------------------------------===//

21
lib/CodeGen/AsmPrinter/DwarfException.cpp
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@ -354,7 +354,7 @@ ComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*> &LandingPads,
I = LandingPads.begin(), E = LandingPads.end(); I != E; ++I) { I = LandingPads.begin(), E = LandingPads.end(); I != E; ++I) {
const LandingPadInfo *LPI = *I; const LandingPadInfo *LPI = *I;
const std::vector<int> &TypeIds = LPI->TypeIds; const std::vector<int> &TypeIds = LPI->TypeIds;
const unsigned NumShared = PrevLPI ? SharedTypeIds(LPI, PrevLPI) : 0; unsigned NumShared = PrevLPI ? SharedTypeIds(LPI, PrevLPI) : 0;
unsigned SizeSiteActions = 0; unsigned SizeSiteActions = 0;
if (NumShared < TypeIds.size()) { if (NumShared < TypeIds.size()) {
@ -362,7 +362,7 @@ ComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*> &LandingPads,
unsigned PrevAction = (unsigned)-1; unsigned PrevAction = (unsigned)-1;
if (NumShared) { if (NumShared) {
const unsigned SizePrevIds = PrevLPI->TypeIds.size(); unsigned SizePrevIds = PrevLPI->TypeIds.size();
assert(Actions.size()); assert(Actions.size());
PrevAction = Actions.size() - 1; PrevAction = Actions.size() - 1;
SizeAction = SizeAction =
@ -622,18 +622,19 @@ void DwarfException::EmitExceptionTable() {
// Final tallies. // Final tallies.
// Call sites. // Call sites.
const unsigned SiteStartSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
const unsigned SiteLengthSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
const unsigned LandingPadSize = SizeOfEncodedValue(dwarf::DW_EH_PE_udata4);
bool IsSJLJ = MAI->getExceptionHandlingType() == ExceptionHandling::SjLj; bool IsSJLJ = MAI->getExceptionHandlingType() == ExceptionHandling::SjLj;
bool HaveTTData = IsSJLJ ? (!TypeInfos.empty() || !FilterIds.empty()) : true; bool HaveTTData = IsSJLJ ? (!TypeInfos.empty() || !FilterIds.empty()) : true;
unsigned CallSiteTableLength; unsigned CallSiteTableLength;
if (IsSJLJ) if (IsSJLJ)
CallSiteTableLength = 0; CallSiteTableLength = 0;
else else {
CallSiteTableLength = CallSites.size() * unsigned SiteStartSize = 4; // dwarf::DW_EH_PE_udata4
(SiteStartSize + SiteLengthSize + LandingPadSize); unsigned SiteLengthSize = 4; // dwarf::DW_EH_PE_udata4
unsigned LandingPadSize = 4; // dwarf::DW_EH_PE_udata4
CallSiteTableLength =
CallSites.size() * (SiteStartSize + SiteLengthSize + LandingPadSize);
}
for (unsigned i = 0, e = CallSites.size(); i < e; ++i) { for (unsigned i = 0, e = CallSites.size(); i < e; ++i) {
CallSiteTableLength += MCAsmInfo::getULEB128Size(CallSites[i].Action); CallSiteTableLength += MCAsmInfo::getULEB128Size(CallSites[i].Action);
@ -650,7 +651,7 @@ void DwarfException::EmitExceptionTable() {
// For SjLj exceptions, if there is no TypeInfo, then we just explicitly say // For SjLj exceptions, if there is no TypeInfo, then we just explicitly say
// that we're omitting that bit. // that we're omitting that bit.
TTypeEncoding = dwarf::DW_EH_PE_omit; TTypeEncoding = dwarf::DW_EH_PE_omit;
TypeFormatSize = SizeOfEncodedValue(dwarf::DW_EH_PE_absptr); TypeFormatSize = TD->getPointerSize(); // dwarf::DW_EH_PE_absptr
} else { } else {
// Okay, we have actual filters or typeinfos to emit. As such, we need to // Okay, we have actual filters or typeinfos to emit. As such, we need to
// pick a type encoding for them. We're about to emit a list of pointers to // pick a type encoding for them. We're about to emit a list of pointers to

16
lib/CodeGen/AsmPrinter/DwarfPrinter.cpp
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@ -43,18 +43,12 @@ unsigned DwarfPrinter::SizeOfEncodedValue(unsigned Encoding) const {
return 0; return 0;
switch (Encoding & 0x07) { switch (Encoding & 0x07) {
case dwarf::DW_EH_PE_absptr: default: assert(0 && "Invalid encoded value.");
return TD->getPointerSize(); case dwarf::DW_EH_PE_absptr: return TD->getPointerSize();
case dwarf::DW_EH_PE_udata2: case dwarf::DW_EH_PE_udata2: return 2;
return 2; case dwarf::DW_EH_PE_udata4: return 4;
case dwarf::DW_EH_PE_udata4: case dwarf::DW_EH_PE_udata8: return 8;
return 4;
case dwarf::DW_EH_PE_udata8:
return 8;
} }
assert(0 && "Invalid encoded value.");
return 0;
} }
void DwarfPrinter::EmitReference(const MCSymbol *Sym, unsigned Encoding) const { void DwarfPrinter::EmitReference(const MCSymbol *Sym, unsigned Encoding) const {