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Code Issues Projects Releases Wiki Activity

Eliminate unnecessary scopes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32020 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-11-29 16:55:57 +00:00
parent 619965d32e
commit 36729ddd23
1 changed files with 27 additions and 21 deletions
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48
lib/CodeGen/DwarfWriter.cpp
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@ -1872,7 +1872,8 @@ private:
/// ConstructScope - Construct the components of a scope.
///
void ConstructScope(DebugScope *ParentScope,
DIE *ParentDie, CompileUnit *Unit) {
unsigned ParentStartID, unsigned ParentEndID,
DIE *ParentDie, CompileUnit *Unit) {
// Add variables to scope.
std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
@ -1895,27 +1896,32 @@ private:
if (StartID == EndID && StartID != 0) continue;
if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
// Add the scope bounds.
if (StartID) {
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
DWLabel("loc", StartID));
if (StartID == ParentStartID && EndID == ParentEndID) {
// Just add stuff to the parent scope.
ConstructScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
} else {
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
DWLabel("func_begin", SubprogramCount));
DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
// Add the scope bounds.
if (StartID) {
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
DWLabel("loc", StartID));
} else {
AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
DWLabel("func_begin", SubprogramCount));
}
if (EndID) {
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
DWLabel("loc", EndID));
} else {
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
DWLabel("func_end", SubprogramCount));
}
// Add the scope contents.
ConstructScope(Scope, StartID, EndID, ScopeDie, Unit);
ParentDie->AddChild(ScopeDie);
}
if (EndID) {
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
DWLabel("loc", EndID));
} else {
AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
DWLabel("func_end", SubprogramCount));
}
// Add the scope contents.
ConstructScope(Scope, ScopeDie, Unit);
ParentDie->AddChild(ScopeDie);
}
}
@ -1943,7 +1949,7 @@ private:
MachineLocation Location(RI->getFrameRegister(*MF));
AddAddress(SPDie, DW_AT_frame_base, Location);
ConstructScope(RootScope, SPDie, Unit);
ConstructScope(RootScope, 0, 0, SPDie, Unit);
}
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc