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[PATCH, middle-end]: move superblock formation to Tree-SSA

Please find attached a patch to move Superblock formation to the Tree- SSA representation. This change buys about 1% on SPEC on IA64 and x86.

Thank you
Robert Kidd
rkidd@crhc.uiuc.edu

2007-06-11 Robert Kidd <rkidd@crhc.uiuc.edu>

	* bb-reorder.c (rest_of_handler_reorder_blocks): Removed call to
	RTL level tracer pass.
	* passes.c (init_optimization_passes): Move pass_tracer from
	after pass_rtl_ifcvt to after pass_dce.
	* tracer.c: Update copyright.
	(layout_superblocks): Remove function.
	(mark_bb_seen): New.
	(bb_seen_p): New.
	(count_insns): Change to estimate instructions in a Tree-SSA
	statement.
	(find_trace): Use bb_seen_p.
	(tail_duplicate): Use bb_seen_p.  Call add_phi_args_after_copy
	after duplicate_block.
	(tracer): Change prototype to match that of a pass execute
	callback.
	(gate_tracer): Rename from gate_handle_tracer.
	(rest_of_handle_tracer): Remove function.
	* rtl.h: Remove prototype for tracer.
	* testsuite/gcc.dg/tree-prof/tracer-1.c: New.

Attachment: superblock-1-20070611.patch.txt
Description: Text document


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