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4.4.1-21

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Jakub Jelinek 2009-10-10 17:19:46 +00:00
parent 22fa975b2a
commit 8e816cd8e4
1 changed files with 54 additions and 0 deletions
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gcc44-pr41646.patch Normal file
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@ -0,0 +1,54 @@
2009-10-09 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/41646
* calls.c (expand_call): For BLKmode types returned in registers
avoid likely spilled hard regs in copy_blkmode_from_reg generated
insns.
* gcc.c-torture/compile/pr41646.c: New test.
--- gcc/calls.c (revision 152596)
+++ gcc/calls.c (revision 152597)
@@ -3020,7 +3020,10 @@ expand_call (tree exp, rtx target, int i
}
else if (TYPE_MODE (rettype) == BLKmode)
{
- target = copy_blkmode_from_reg (target, valreg, rettype);
+ rtx val = valreg;
+ if (GET_MODE (val) != BLKmode)
+ val = avoid_likely_spilled_reg (val);
+ target = copy_blkmode_from_reg (target, val, rettype);
/* We can not support sibling calls for this case. */
sibcall_failure = 1;
--- gcc/testsuite/gcc.c-torture/compile/pr41646.c (revision 0)
+++ gcc/testsuite/gcc.c-torture/compile/pr41646.c (revision 152597)
@@ -0,0 +1,28 @@
+/* PR rtl-optimization/41646 */
+
+struct A { unsigned long a; };
+struct B { unsigned short b, c, d; };
+struct B bar (unsigned long);
+
+char *
+foo (char *a, struct A *x)
+{
+ struct B b = bar (x->a);
+ unsigned char c;
+ unsigned short d;
+ a[3] = ((unsigned char) (b.b % 10) + 48);
+ d = b.b / 10;
+ a[2] = ((unsigned char) (d % 10) + 48);
+ d = d / 10;
+ a[1] = ((unsigned char) (d % 10) + 48);
+ a[0] = ((unsigned char) ((d / 10) % 10) + 48);
+ a[4] = 46;
+ c = (unsigned char) b.c;
+ a[6] = (c % 10 + 48);
+ a[5] = ((c / 10) % 10 + 48);
+ a[7] = 46;
+ c = b.d;
+ a[9] = (c % 10 + 48);
+ a[8] = ((c / 10) % 10 + 48);
+ return a + 10;
+}