53 lines
1.3 KiB
Diff
53 lines
1.3 KiB
Diff
2009-10-08 Jakub Jelinek <jakub@redhat.com>
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* tree-ssa-operands.c (pop_stmt_changes): In DEBUG stmts, if
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an SSA operand is DECL_P and referenced, mark it for renaming.
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* gcc.dg/debug/vta-2.c: New test.
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--- gcc/tree-ssa-operands.c.jj 2009-10-08 01:08:23.000000000 +0200
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+++ gcc/tree-ssa-operands.c 2009-10-08 08:57:45.000000000 +0200
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@@ -2715,12 +2715,16 @@ pop_stmt_changes (gimple *stmt_p)
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if (gimple_debug_bind_p (stmt))
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{
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FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_DEF|SSA_OP_USE)
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- if (DECL_P (op) && !referenced_var_p (op))
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+ if (!DECL_P (op))
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+ continue;
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+ else if (!referenced_var_p (op))
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{
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gimple_debug_bind_reset_value (stmt);
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update_stmt (stmt);
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break;
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}
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+ else
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+ mark_sym_for_renaming (op);
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}
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else
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{
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--- gcc/testsuite/gcc.dg/debug/vta-2.c.jj 2009-10-08 09:55:36.000000000 +0200
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+++ gcc/testsuite/gcc.dg/debug/vta-2.c 2009-10-08 09:55:49.000000000 +0200
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@@ -0,0 +1,22 @@
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+/* { dg-do compile } */
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+/* { dg-options "-O2 -g" } */
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+
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+static int
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+bar (void *a, unsigned int b, int n)
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+{
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+ int c = *(unsigned long *) a % b;
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+ *(unsigned long *) a = (int) (*(unsigned long *) a) / b;
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+ return c;
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+}
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+
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+int
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+foo (unsigned long x, int *y, int z)
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+{
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+ int level;
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+ for (level = 0; level < *y; level++)
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+ {
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+ bar (&x, z, sizeof (x));
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+ if (x)
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+ return *y - 1;
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+ }
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+}
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