77 lines
1.9 KiB
Diff
77 lines
1.9 KiB
Diff
2017-02-10 Jakub Jelinek <jakub@redhat.com>
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PR rtl-optimization/79388
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PR rtl-optimization/79450
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* combine.c (distribute_notes): When removing TEM_INSN for which
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corresponding dest has last value recorded, invalidate that last
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value.
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* gcc.c-torture/execute/pr79388.c: New test.
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* gcc.c-torture/execute/pr79450.c: New test.
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--- gcc/combine.c.jj 2017-01-30 09:31:48.000000000 +0100
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+++ gcc/combine.c 2017-02-10 17:05:57.500482518 +0100
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@@ -14288,6 +14288,11 @@ distribute_notes (rtx notes, rtx_insn *f
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NULL_RTX, NULL_RTX, NULL_RTX);
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distribute_links (LOG_LINKS (tem_insn));
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+ unsigned int regno = REGNO (XEXP (note, 0));
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+ reg_stat_type *rsp = ®_stat[regno];
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+ if (rsp->last_set == tem_insn)
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+ record_value_for_reg (XEXP (note, 0), NULL, NULL_RTX);
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+
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SET_INSN_DELETED (tem_insn);
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if (tem_insn == i2)
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i2 = NULL;
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--- gcc/testsuite/gcc.c-torture/execute/pr79388.c.jj 2017-02-10 17:03:01.993814529 +0100
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+++ gcc/testsuite/gcc.c-torture/execute/pr79388.c 2017-02-10 17:02:50.000000000 +0100
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@@ -0,0 +1,23 @@
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+/* PR rtl-optimization/79388 */
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+/* { dg-additional-options "-fno-tree-coalesce-vars" } */
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+
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+unsigned int a, c;
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+
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+__attribute__ ((noinline, noclone)) unsigned int
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+foo (unsigned int p)
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+{
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+ p |= 1;
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+ p &= 0xfffe;
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+ p %= 0xffff;
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+ c = p;
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+ return a + p;
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+}
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+
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+int
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+main (void)
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+{
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+ int x = foo (6);
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+ if (x != 6)
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+ __builtin_abort();
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+ return 0;
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+}
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--- gcc/testsuite/gcc.c-torture/execute/pr79450.c.jj 2017-02-10 17:03:45.698233423 +0100
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+++ gcc/testsuite/gcc.c-torture/execute/pr79450.c 2017-02-10 17:03:39.000000000 +0100
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@@ -0,0 +1,22 @@
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+/* PR rtl-optimization/79450 */
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+
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+unsigned int
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+foo (unsigned char x, unsigned long long y)
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+{
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+ do
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+ {
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+ x &= !y;
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+ x %= 24;
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+ }
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+ while (x < y);
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+ return x + y;
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+}
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+
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+int
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+main (void)
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+{
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+ unsigned int x = foo (1, 0);
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+ if (x != 1)
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+ __builtin_abort ();
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+ return 0;
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+}
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