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