OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR c/85094 (-g with any optimization suppresses -Wduplicated-branches)

Browse Source 
PR c/85094
	* fold-const.c (operand_equal_p): Handle DEBUG_BEGIN_STMT.
	For STATEMENT_LIST, pass down OEP_LEXICOGRAPHIC and maybe
	OEP_NO_HASH_CHECK for recursive call, to avoid exponential
	checking.

	* c-c++-common/Wduplicated-branches-14.c: New test.

From-SVN: r258950
This commit is contained in:
Jakub Jelinek 2018-03-29 12:37:58 +02:00 committed by Jakub Jelinek
parent 52df8bd933
commit 063700a6d2
4 changed files with 35 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2018-03-29 Jakub Jelinek <jakub@redhat.com>
PR c/85094
* fold-const.c (operand_equal_p): Handle DEBUG_BEGIN_STMT.
For STATEMENT_LIST, pass down OEP_LEXICOGRAPHIC and maybe
OEP_NO_HASH_CHECK for recursive call, to avoid exponential
checking.
2018-03-28 Peter Bergner <bergner@vnet.ibm.com>
PR target/84912

7
gcc/fold-const.c
View File

@ -3479,7 +3479,8 @@ operand_equal_p (const_tree arg0, const_tree arg1, unsigned int flags)
if (tsi_end_p (tsi1) && tsi_end_p (tsi2))
return 1;
if (!operand_equal_p (tsi_stmt (tsi1), tsi_stmt (tsi2),
OEP_LEXICOGRAPHIC))
flags & (OEP_LEXICOGRAPHIC
| OEP_NO_HASH_CHECK)))
return 0;
}
}
@ -3492,6 +3493,10 @@ operand_equal_p (const_tree arg0, const_tree arg1, unsigned int flags)
if (flags & OEP_LEXICOGRAPHIC)
return OP_SAME_WITH_NULL (0);
return 0;
case DEBUG_BEGIN_STMT:
if (flags & OEP_LEXICOGRAPHIC)
return 1;
return 0;
default:
return 0;
}

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2018-03-29 Jakub Jelinek <jakub@redhat.com>
PR c/85094
* c-c++-common/Wduplicated-branches-14.c: New test.
2018-03-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/84606

16
gcc/testsuite/c-c++-common/Wduplicated-branches-14.c Normal file
View File

@ -0,0 +1,16 @@
/* PR c/85094 */
/* { dg-do compile } */
/* { dg-options "-O1 -Wduplicated-branches -g" } */
extern int g;
void
foo (int r)
{
if (r < 64)
g -= 48;
else if (r < 80) /* { dg-warning "this condition has identical branches" } */
g -= 64 - 45;
else
g -= 80 - 61;
}