2011-02-18 Chung-Lin Tang <cltang@codesourcery.com>

	PR rtl-optimization/46178
	* ira.c (setup_hard_regno_class): Use ira_class_translate[] to
	compute ira_hard_regno_cover_class[].

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@170277 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3e31b74..32b4921 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-02-18  Chung-Lin Tang  <cltang@codesourcery.com>
+
+       PR rtl-optimization/46178
+       * ira.c (setup_hard_regno_class): Use ira_class_translate[] to
+       compute ira_hard_regno_cover_class[].
+
 2011-02-18  Richard Guenther  <rguenther@suse.de>
 
        PR lto/47798

diff --git a/gcc/ira.c b/gcc/ira.c
index 5f27fc2..68d47fb 100644 (file)
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -1033,22 +1033,14 @@ find_reg_class_closure (void)
 static void
 setup_hard_regno_cover_class (void)
 {
-  int i, j;
-  enum reg_class cl;
+  int i;
 
   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
     {
-      ira_hard_regno_cover_class[i] = NO_REGS;
-      for (j = 0; j < ira_reg_class_cover_size; j++)
-       {
-         cl = ira_reg_class_cover[j];
-         if (ira_class_hard_reg_index[cl][i] >= 0)
-           {
-             ira_hard_regno_cover_class[i] = cl;
-             break;
-           }
-       }
-
+      ira_hard_regno_cover_class[i]
+       = (TEST_HARD_REG_BIT (no_unit_alloc_regs, i)
+          ? NO_REGS
+          : ira_class_translate[REGNO_REG_CLASS (i)]);
     }
 }