49 lines
1.4 KiB
Diff
49 lines
1.4 KiB
Diff
2008-04-15 Jakub Jelinek <jakub@redhat.com>
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PR c/35739
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* tree-nrv.c (tree_nrv): Don't optimize if result_type is GIMPLE
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reg type.
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* gcc.dg/dfp/pr35739.c: New test.
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--- gcc/tree-nrv.c.jj 2008-04-04 15:12:00.000000000 +0200
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+++ gcc/tree-nrv.c 2008-04-15 20:00:07.000000000 +0200
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@@ -1,5 +1,5 @@
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/* Language independent return value optimizations
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- Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
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+ Copyright (C) 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
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This file is part of GCC.
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@@ -115,6 +115,11 @@ tree_nrv (void)
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if (!aggregate_value_p (result, current_function_decl))
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return 0;
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+ /* If a GIMPLE type is returned in memory, finalize_nrv_r might create
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+ non-GIMPLE. */
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+ if (is_gimple_reg_type (result_type))
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+ return 0;
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+
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/* Look through each block for assignments to the RESULT_DECL. */
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FOR_EACH_BB (bb)
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{
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--- gcc/testsuite/gcc.dg/dfp/pr35739.c.jj 2008-04-15 20:02:55.000000000 +0200
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+++ gcc/testsuite/gcc.dg/dfp/pr35739.c 2008-04-15 20:18:15.000000000 +0200
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@@ -0,0 +1,16 @@
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+/* PR c/35739 */
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+/* { dg-do compile { target *-*-linux* } } */
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+/* { dg-options "-O -fpreprocessed -fmudflap" } */
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+
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+_Decimal128
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+foo (int n, ...)
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+{
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+ int i;
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+ _Decimal128 j = 0;
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+ __builtin_va_list ap;
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+ __builtin_va_start (ap, n);
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+ for (i = 0; i < n; i++)
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+ j += __builtin_va_arg (ap, _Decimal128);
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+ __builtin_va_end (ap);
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+ return j;
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+}
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