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cfgcleanup.c (old_insns_match_p): Handle the case of empty blocks.

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2009-07-25  David Daney  <ddaney@caviumnetworks.com>

	* cfgcleanup.c (old_insns_match_p): Handle the case of empty
	blocks.

2009-07-25  David Daney  <ddaney@caviumnetworks.com>

	* gcc.dg/builtin-unreachable-4.c: New test.

From-SVN: r150089
This commit is contained in:
David Daney 2009-07-25 20:20:59 +00:00 committed by David Daney
parent 504ed63a1a
commit ba21aba3e5
4 changed files with 29 additions and 1 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2009-07-25 David Daney <ddaney@caviumnetworks.com>
* cfgcleanup.c (old_insns_match_p): Handle the case of empty
blocks.
2009-07-25 Martin Jambor <mjambor@suse.cz>
* c-common.c (c_common_attribute_table): New element for noclone.

7
gcc/cfgcleanup.c
View File

@ -953,7 +953,12 @@ old_insns_match_p (int mode ATTRIBUTE_UNUSED, rtx i1, rtx i2)
if (GET_CODE (i1) != GET_CODE (i2))
return false;
p1 = PATTERN (i1);
/* __builtin_unreachable() may lead to empty blocks (ending with
NOTE_INSN_BASIC_BLOCK). They may be crossjumped. */
if (NOTE_INSN_BASIC_BLOCK_P (i1) && NOTE_INSN_BASIC_BLOCK_P (i2))
return true;
p1 = PATTERN (i1);
p2 = PATTERN (i2);
if (GET_CODE (p1) != GET_CODE (p2))

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2009-07-25 David Daney <ddaney@caviumnetworks.com>
* gcc.dg/builtin-unreachable-4.c: New test.
2009-07-25 Tobias Burnus <burnus@net-b.de>
PR fortran/33197

14
gcc/testsuite/gcc.dg/builtin-unreachable-4.c Normal file
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@ -0,0 +1,14 @@
/* Check that this valid code doesn't ICE. */
/* { dg-do compile } */
/* { dg-options "-O2" } */
void
g (int a, int b, int c, int d)
{
if (d)
{
((void)
(!(a && b && c) ? __builtin_unreachable (), 0 : 0));
}
((void)
(!(a && b && c) ? __builtin_unreachable (), 0 : 0));
}