2013-07-22 Po-Chun Chang <pchang9@cs.wisc.edu>

	* reload.c (find_reloads): Exit loop once we find this operand
	cannot be reloaded somehow for this alternative.

	* reload.c (find_reloads): Exit loop once we find a hard register.

	* rtlanal.c (computed_jump_p): Exit loop once we find label
	reference is used.

	* i386.c (ix86_pad_returns): Exit loop after setting replace.

	* cfgloopmanip.c (remove_path): Exit loop after setting
	irred_invalidated.

	* gensupport.c (subst_dup): Avoid loop if code is not
	MATCH_DUP nor MATCH_OP_DUP.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@201174 138bc75d-0d04-0410-961f-82ee72b054a4

6 files changed, 43 insertions, 9 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b2851dd358a..95a86e47b1f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,21 @@
+2013-07-22  Po-Chun Chang  <pchang9@cs.wisc.edu>
+
+	* reload.c (find_reloads): Exit loop once we find this operand
+	cannot be reloaded somehow for this alternative.
+
+	* reload.c (find_reloads): Exit loop once we find a hard register.
+
+	* rtlanal.c (computed_jump_p): Exit loop once we find label
+	reference is used.
+
+	* i386.c (ix86_pad_returns): Exit loop after setting replace.
+
+	* cfgloopmanip.c (remove_path): Exit loop after setting
+	irred_invalidated.
+
+	* gensupport.c (subst_dup): Avoid loop if code is not
+	MATCH_DUP nor MATCH_OP_DUP.
+
 2013-07-23  Nicklas Bo Jensen  <nbjensen@gmail.com>
 
 	* doc/md.texi (Machine-Specific Peephole Optimizers): Fix a typo.
@@ -161,7 +179,7 @@
 	-march=r5900 -mhard-float -mdouble-float.  Use spu_single_format
 	for -march=r5900 -mhard-float.
 
-2013-07-22  Chang  <pchang9@cs.wisc.edu>
+2013-07-22  Po-Chun Chang  <pchang9@cs.wisc.edu>
 
 	* df-problems.c (can_move_insns_across): Exit loop once we
 	find a non-fixed, non-global register.
@@ -433,7 +451,7 @@
 
 	* tree-pass.h (pass_ipa_lto_wpa_fixup): Remove redundant decl.
 
-2013-07-18  Chang  <pchang9@cs.wisc.edu>
+2013-07-18  Po-Chun Chang  <pchang9@cs.wisc.edu>
 
 	* read-rtl.c (validate_const_int): Once an invalid character is
 	seen, quit the loop.
diff --git a/gcc/cfgloopmanip.c b/gcc/cfgloopmanip.c
index bc877559052..f35e5aedc79 100644
--- a/gcc/cfgloopmanip.c
+++ b/gcc/cfgloopmanip.c
@@ -343,7 +343,11 @@ remove_path (edge e)
     FOR_EACH_EDGE (ae, ei, e->src->succs)
       if (ae != e && ae->dest != EXIT_BLOCK_PTR && !bitmap_bit_p (seen, ae->dest->index)
 	  && ae->flags & EDGE_IRREDUCIBLE_LOOP)
-	irred_invalidated = true;
+	{
+	  irred_invalidated = true;
+	  break;
+	}
+
   for (i = 0; i < nrem; i++)
     {
       bb = rem_bbs[i];
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 140c5691359..0c546af00b2 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -35725,7 +35725,10 @@ ix86_pad_returns (void)
 	  FOR_EACH_EDGE (e, ei, bb->preds)
 	    if (EDGE_FREQUENCY (e) && e->src->index >= 0
 		&& !(e->flags & EDGE_FALLTHRU))
-	      replace = true;
+	      {
+		replace = true;
+		break;
+	      }
 	}
       if (!replace)
 	{
diff --git a/gcc/gensupport.c b/gcc/gensupport.c
index 19b92408dc4..c7a27c42617 100644
--- a/gcc/gensupport.c
+++ b/gcc/gensupport.c
@@ -2178,8 +2178,8 @@ subst_dup (rtx pattern, int n_alt, int n_subst_alt)
 	  if (XVEC (pattern, i) == NULL)
 	    break;
 	case 'E':
-	  for (j = XVECLEN (pattern, i) - 1; j >= 0; --j)
-	    if (code != MATCH_DUP && code != MATCH_OP_DUP)
+	  if (code != MATCH_DUP && code != MATCH_OP_DUP)
+	    for (j = XVECLEN (pattern, i) - 1; j >= 0; --j)
 	      XVECEXP (pattern, i, j) = subst_dup (XVECEXP (pattern, i, j),
 						   n_alt, n_subst_alt);
 	  break;
diff --git a/gcc/reload.c b/gcc/reload.c
index 8733ff33467..b15f3b20eb7 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -3324,7 +3324,10 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
 		      for (j = 0; j < i; j++)
 			if (this_alternative_matches[j]
 			    == this_alternative_matches[i])
-			  badop = 1;
+			  {
+			    badop = 1;
+			    break;
+			  }
 		    break;
 
 		  case 'p':
@@ -4640,7 +4643,10 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
 
 	    for (nri = 1; nri < nr; nri ++)
 	      if (! TEST_HARD_REG_BIT (reg_class_contents[rld[i].rclass], regno + nri))
-		ok = 0;
+		{
+		  ok = 0;
+		  break;
+		}
 
 	    if (ok)
 	      rld[i].reg_rtx = dest;
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index 9567694bc15..95a314f0f3f 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -2802,7 +2802,10 @@ computed_jump_p (const_rtx insn)
 	    if (GET_CODE (XVECEXP (pat, 0, i)) == USE
 		&& (GET_CODE (XEXP (XVECEXP (pat, 0, i), 0))
 		    == LABEL_REF))
-	      has_use_labelref = 1;
+	      {
+	        has_use_labelref = 1;
+	        break;
+	      }
 
 	  if (! has_use_labelref)
 	    for (i = len - 1; i >= 0; i--)