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2010-09-28 Sriraman Tallam <tmsriram@google.com>

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* target.h (Target::can_icf_inline_merge_sections): New virtual
	function.
	* x86_64.cc (Target__x86_64::can_icf_inline_merge_sections): New
	virtual function.
	* i386.cc (Target_i386::can_icf_inline_merge_sections): New
	virtual function.
	* icf.cc (get_section_contents): Inline merge sections only when
	target allows it.
This commit is contained in:
Sriraman Tallam 2010-09-28 17:14:15 +00:00
parent 22e603ef76
commit c95e9f2791
5 changed files with 28 additions and 1 deletions
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11
gold/ChangeLog
View File

@ -1,3 +1,14 @@
2010-09-28 Sriraman Tallam <tmsriram@google.com>
* target.h (Target::can_icf_inline_merge_sections): New virtual
function.
* x86_64.cc (Target__x86_64::can_icf_inline_merge_sections): New
virtual function.
* i386.cc (Target_i386::can_icf_inline_merge_sections): New
virtual function.
* icf.cc (get_section_contents): Inline merge sections only when
target allows it.
2010-09-27 Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
* configure: Regenerate.

4
gold/i386.cc
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@ -175,6 +175,10 @@ class Target_i386 : public Target_freebsd<32, false>
can_check_for_function_pointers() const
{ return true; }
virtual bool
can_icf_inline_merge_sections () const
{ return true; }
// Process the relocations to determine unreferenced sections for
// garbage collection.
void

3
gold/icf.cc
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@ -366,7 +366,8 @@ get_section_contents(bool first_iteration,
uint64_t secn_flags = (it_v->first)->section_flags(it_v->second);
// This reloc points to a merge section. Hash the
// contents of this section.
if ((secn_flags & elfcpp::SHF_MERGE) != 0)
if ((secn_flags & elfcpp::SHF_MERGE) != 0
&& parameters->target().can_icf_inline_merge_sections ())
{
uint64_t entsize =
(it_v->first)->section_entsize(it_v->second);

7
gold/target.h
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@ -72,6 +72,13 @@ class Target
can_check_for_function_pointers() const
{ return false; }
// This function is used in ICF (icf.cc). This is set to true by
// the target if a relocation to a merged section can be processed
// to retrieve the contents of the merged section.
virtual bool
can_icf_inline_merge_sections () const
{ return false; }
// Whether a section called SECTION_NAME may have function pointers to
// sections not eligible for safe ICF folding.
virtual bool

4
gold/x86_64.cc
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@ -189,6 +189,10 @@ class Target_x86_64 : public Target_freebsd<64, false>
can_check_for_function_pointers() const
{ return !parameters->options().pie(); }
virtual bool
can_icf_inline_merge_sections () const
{ return true; }
// Hook for a new output section.
void
do_new_output_section(Output_section*) const;