===================================================================
@@ -197,6 +197,12 @@ reload_pseudo_compare_func (const void *
if ((diff = (regno_assign_info[regno_assign_info[r2].first].freq
- regno_assign_info[regno_assign_info[r1].first].freq)) != 0)
return diff;
+ /* Allocate bigger pseudos first to avoid register file
+ fragmentation. */
+ if ((diff
+ = (ira_reg_class_max_nregs[cl2][lra_reg_info[r2].biggest_mode]
+ - ira_reg_class_max_nregs[cl1][lra_reg_info[r1].biggest_mode])) != 0)
+ return diff;
/* Put pseudos from the thread nearby. */
if ((diff = regno_assign_info[r1].first - regno_assign_info[r2].first) != 0)
return diff;
===================================================================
@@ -0,0 +1,38 @@
+/* PR target/56348 */
+/* { dg-do compile { target { ia32 } } } */
+/* { dg-options "-O2 -fPIC -mfpmath=sse -msse2" } */
+
+typedef unsigned int size_t;
+
+extern double fabs (double __x) __attribute__ ((__nothrow__, __leaf__))
+ __attribute__ ((__const__));
+
+typedef struct cholmod_sparse_struct
+{
+ size_t ncol;
+ void *p;
+} cholmod_sparse;
+
+int cholmod_l_reallocate_sparse (size_t, cholmod_sparse *, void *);
+
+int
+cholmod_l_drop (double tol, cholmod_sparse * A)
+{
+ double aij;
+ double *Ax;
+ long long *Ap, *Ai, *Anz;
+ long long packed, i, j, nrow, ncol, p, pend, nz, values;
+ Ap = A->p;
+ ncol = A->ncol;
+ nz = 0;
+ for (j = 0; j < ncol; j++)
+ for (; p < pend; p++)
+ {
+ i = Ai[p];
+ aij = Ax[p];
+ if (i <= j && (fabs (aij) > tol || ((aij) != (aij))))
+ nz++;
+ }
+ Ap[ncol] = nz;
+ cholmod_l_reallocate_sparse (nz, A, 0);
+}
The following patch fixes PR56348. The details of the problem are given on http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56348 The patch was successfully bootstrapped and tested on x86/x86-64. Committed as rev. 196090. 2013-02-15 Vladimir Makarov <vmakarov@redhat.com> PR rtl-optimization/56348 * lra-assigns.c (reload_pseudo_compare_func): Prefer bigger pseudos. 2013-02-15 Vladimir Makarov <vmakarov@redhat.com> PR rtl-optimization/56348 * gcc.target/i386/pr56348.c: New test.