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cselib.c (cselib_hash_rtx): Perform addition in unsigned type to avoid signed integer overflow. 

* cselib.c (cselib_hash_rtx): Perform addition in unsigned
	type to avoid signed integer overflow.
	* explow.c (plus_constant): Likewise.

From-SVN: r208804
This commit is contained in:
Jakub Jelinek 2014-03-25 10:27:54 +01:00 committed by Jakub Jelinek
parent 57fc74a48b
commit a8acccddfd
3 changed files with 8 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2014-03-25 Jakub Jelinek <jakub@redhat.com>
* cselib.c (cselib_hash_rtx): Perform addition in unsigned
type to avoid signed integer overflow.
* explow.c (plus_constant): Likewise.
2014-03-25 Dominik Vogt <vogt@linux.vnet.ibm.com>
* doc/generic.texi: Correct typos.

2
gcc/cselib.c
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@ -1137,7 +1137,7 @@ cselib_hash_rtx (rtx x, int create, enum machine_mode memmode)
return hash ? hash : (unsigned int) ENTRY_VALUE;
case CONST_INT:
hash += ((unsigned) CONST_INT << 7) + INTVAL (x);
hash += ((unsigned) CONST_INT << 7) + UINTVAL (x);
return hash ? hash : (unsigned int) CONST_INT;
case CONST_DOUBLE:

2
gcc/explow.c
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@ -110,7 +110,7 @@ plus_constant (enum machine_mode mode, rtx x, HOST_WIDE_INT c)
return immed_double_int_const (v, mode);
}
return gen_int_mode (INTVAL (x) + c, mode);
return gen_int_mode (UINTVAL (x) + c, mode);
case CONST_DOUBLE:
{