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Until now all debug info MDNodes referred to a root MDNode, a compile unit. This simplified handling of these needs in dwarf writer. However, one side effect of this is that during link time optimization all these MDNodes are _not_ uniqued. In other words there will be N number of MDNodes describing "int", "char" and all other types, which would suddenly grow when each object file starts using libraries like STL.

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MDNodes graph structure such that compiler unit keeps track of important MDNodes and update dwarf writer to process mdnodes top-down instead of bottom up.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137778 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2011-08-16 22:09:43 +00:00
parent 054ddf799b
commit 94c7ddb6f5
9 changed files with 249 additions and 179 deletions
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15
include/llvm/Analysis/DebugInfo.h
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@ -182,6 +182,11 @@ namespace llvm {
StringRef getFlags() const { return getStringField(8); }
unsigned getRunTimeVersion() const { return getUnsignedField(9); }
DIArray getEnumTypes() const;
DIArray getRetainedTypes() const;
DIArray getSubprograms() const;
DIArray getGlobalVariables() const;
/// Verify - Verify that a compile unit is well formed.
bool Verify() const;
@ -201,7 +206,10 @@ namespace llvm {
}
StringRef getFilename() const { return getStringField(1); }
StringRef getDirectory() const { return getStringField(2); }
DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(3); }
DICompileUnit getCompileUnit() const{
assert (getVersion() <= LLVMDebugVersion10 && "Invalid CompileUnit!");
return getFieldAs<DICompileUnit>(3);
}
};
/// DIEnumerator - A wrapper for an enumerator (e.g. X and Y in 'enum {X,Y}').
@ -237,6 +245,7 @@ namespace llvm {
DIScope getContext() const { return getFieldAs<DIScope>(1); }
StringRef getName() const { return getStringField(2); }
DICompileUnit getCompileUnit() const{
assert (getVersion() <= LLVMDebugVersion10 && "Invalid getCompileUnit!");
if (getVersion() == llvm::LLVMDebugVersion7)
return getFieldAs<DICompileUnit>(3);
@ -450,6 +459,7 @@ namespace llvm {
StringRef getDisplayName() const { return getStringField(4); }
StringRef getLinkageName() const { return getStringField(5); }
DICompileUnit getCompileUnit() const{
assert (getVersion() <= LLVMDebugVersion10 && "Invalid getCompileUnit!");
if (getVersion() == llvm::LLVMDebugVersion7)
return getFieldAs<DICompileUnit>(6);
@ -560,6 +570,7 @@ namespace llvm {
StringRef getDisplayName() const { return getStringField(4); }
StringRef getLinkageName() const { return getStringField(5); }
DICompileUnit getCompileUnit() const{
assert (getVersion() <= LLVMDebugVersion10 && "Invalid getCompileUnit!");
if (getVersion() == llvm::LLVMDebugVersion7)
return getFieldAs<DICompileUnit>(6);
@ -595,6 +606,7 @@ namespace llvm {
DIScope getContext() const { return getFieldAs<DIScope>(1); }
StringRef getName() const { return getStringField(2); }
DICompileUnit getCompileUnit() const{
assert (getVersion() <= LLVMDebugVersion10 && "Invalid getCompileUnit!");
if (getVersion() == llvm::LLVMDebugVersion7)
return getFieldAs<DICompileUnit>(3);
@ -687,6 +699,7 @@ namespace llvm {
return getFieldAs<DIFile>(3).getFilename();
}
DICompileUnit getCompileUnit() const{
assert (getVersion() <= LLVMDebugVersion10 && "Invalid getCompileUnit!");
if (getVersion() == llvm::LLVMDebugVersion7)
return getFieldAs<DICompileUnit>(3);