see removal

From-SVN: r148664

gcc/Makefile.in

@@ -1215,7 +1215,6 @@ OBJS-common = \
 	sched-rgn.o \
 	sched-vis.o \
 	sdbout.o \
-	see.o \
 	sel-sched-ir.o \
 	sel-sched-dump.o \
 	sel-sched.o \
@@ -2734,10 +2733,6 @@ fwprop.o : fwprop.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
 web.o : web.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
    hard-reg-set.h $(FLAGS_H) $(BASIC_BLOCK_H) $(FUNCTION_H) output.h $(TOPLEV_H) \
    $(DF_H) $(OBSTACK_H) $(TIMEVAR_H) $(TREE_PASS_H)
-see.o : see.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
-   hard-reg-set.h $(FLAGS_H) $(BASIC_BLOCK_H) $(FUNCTION_H) output.h \
-   $(DF_H) $(OBSTACK_H) $(TIMEVAR_H) $(TREE_PASS_H) $(RECOG_H) $(EXPR_H) \
-   $(SPLAY_TREE_H) $(HASHTAB_H) $(REGS_H) dce.h
 gcse.o : gcse.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) \
    $(REGS_H) hard-reg-set.h $(FLAGS_H) $(REAL_H) insn-config.h $(GGC_H) \
    $(RECOG_H) $(EXPR_H) $(BASIC_BLOCK_H) $(FUNCTION_H) output.h $(TOPLEV_H) \

gcc/common.opt

@@ -1061,8 +1061,8 @@ Common Report Var(flag_section_anchors) Optimization
 Access data in the same section from shared anchor points
 
 fsee
-Common Report Var(flag_see) Init(0)
-Eliminate redundant sign extensions using LCM.
+Common
+Does nothing.  Preserved for backward compatibility.
 
 fshow-column
 Common C ObjC C++ ObjC++ Report Var(flag_show_column) Init(1)

gcc/doc/invoke.texi

@@ -364,7 +364,7 @@ Objective-C and Objective-C++ Dialects}.
 -frounding-math -fsched2-use-superblocks @gol
 -fsched2-use-traces -fsched-spec-load -fsched-spec-load-dangerous @gol
 -fsched-stalled-insns-dep[=@var{n}] -fsched-stalled-insns[=@var{n}] @gol
--fschedule-insns -fschedule-insns2 -fsection-anchors -fsee @gol
+-fschedule-insns -fschedule-insns2 -fsection-anchors @gol
 -fselective-scheduling -fselective-scheduling2 @gol
 -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops @gol
 -fsignaling-nans -fsingle-precision-constant -fsplit-ivs-in-unroller @gol
@@ -6221,11 +6221,6 @@ match the reality and hurt the performance.  This only makes
 sense when scheduling after register allocation, i.e.@: with
 @option{-fschedule-insns2} or at @option{-O2} or higher.
 
-@item -fsee
-@opindex fsee
-Eliminate redundant sign extension instructions and move the non-redundant
-ones to optimal placement using lazy code motion (LCM).
-
 @item -freschedule-modulo-scheduled-loops
 @opindex freschedule-modulo-scheduled-loops
 The modulo scheduling comes before the traditional scheduling, if a loop

gcc/opts.c

@@ -2067,6 +2067,7 @@ common_handle_option (size_t scode, const char *arg, int value,
       flag_pedantic_errors = pedantic = 1;
       break;
 
+    case OPT_fsee:
     case OPT_fcse_skip_blocks:
     case OPT_floop_optimize:
     case OPT_frerun_loop_opt:

gcc/passes.c

@@ -768,7 +768,6 @@ init_optimization_passes (void)
       NEXT_PASS (pass_df_initialize_no_opt);
       NEXT_PASS (pass_stack_ptr_mod);
       NEXT_PASS (pass_mode_switching);
-      NEXT_PASS (pass_see);
       NEXT_PASS (pass_match_asm_constraints);
       NEXT_PASS (pass_sms);
       NEXT_PASS (pass_sched);

gcc/testsuite/gcc.dg/20080522-1.c

-/* { dg-do compile }
-/* { dg-options "-O2 -fsee" } */
-
-int f(const char* ptr, int bar) {
-  return (((const char *)0 - ptr ) & (bar - 1)) == 0;
-}
-
-
-int g(const char* ptr, const char *test, int N, int bar)  {
-  if (N == 0) {
-  }
-  else if (N > 0) {
-    int count = 0;
-    while ( count < N) {
-      if (!f(ptr, bar))
-        count++;
-    }
-  }
-  return f(test, bar) ;
-}

gcc/testsuite/gcc.dg/20080528-1.c

-/* { dg-do compile } */
-/* { dg-options "-O2 -fsee" } */
-
-unsigned long g(int a, int b) {
-  return a / b;
-}
-unsigned long f(long int a) {
-  return g(a, 1<<13);
-}

gcc/timevar.def

@@ -167,7 +167,6 @@ DEFTIMEVAR (TV_BRANCH_PROB           , "branch prediction")
 DEFTIMEVAR (TV_VPT                   , "value profile opts")
 DEFTIMEVAR (TV_COMBINE               , "combiner")
 DEFTIMEVAR (TV_IFCVT		     , "if-conversion")
-DEFTIMEVAR (TV_SEE                   , "see")
 DEFTIMEVAR (TV_REGMOVE               , "regmove")
 DEFTIMEVAR (TV_MODE_SWITCH           , "mode switching")
 DEFTIMEVAR (TV_SMS		     , "sms modulo scheduling")

gcc/tree-pass.h

@@ -479,7 +479,6 @@ extern struct rtl_opt_pass pass_split_all_insns;
 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
 extern struct rtl_opt_pass pass_lower_subreg2;
 extern struct rtl_opt_pass pass_mode_switching;
-extern struct rtl_opt_pass pass_see;
 extern struct rtl_opt_pass pass_sms;
 extern struct rtl_opt_pass pass_sched;
 extern struct rtl_opt_pass pass_ira;