* combine.c: Include "output.h" to define dump_file.

[pf3gnuchains/gcc-fork.git] / gcc / ChangeLog

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fdd36d9..86bb7fa 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,18 @@
 2004-06-30  Roger Sayle  <roger@eyesopen.com>
 
+       * combine.c: Include "output.h" to define dump_file.
+       (uid_insn_cost, last_insn_cost): New global variables.
+       (combine_insn_cost): New function to estimate cost of an insn.
+       (combine_validate_cost): New function to determine whether a
+       try_combine replacement sequence is cheaper than the original.
+       (combine_instructions): Allocate and populate uid_insn_cost
+       array at the start of the combine pass, and deallocate it after.
+       (try_combine): Check combine_validate_cost to determine whether
+       a "recombination" should be rejected as being more expensive.
+       * Makefile.in (combine.o): Add dependency upon output.h.
+
+2004-06-30  Roger Sayle  <roger@eyesopen.com>
+
        * config/rs6000/rs6000.c (rs6000_rtx_costs) <MINUS_EXPR>: Handle
        subtractions identically to additions, always COSTS_N_INSNS (1).