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

re PR debug/42234 (internal compiler error: verify_ssa failed)

Browse Source 
PR debug/42234
	* tree-ssa-dom.c (degenerate_phi_result): Check for NULL phi
	argument earlier.

From-SVN: r155025
This commit is contained in:
Richard Henderson 2009-12-06 15:59:52 -08:00 committed by Richard Henderson
parent a15b72fa7f
commit 6edde54505
3 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2009-12-06 Richard Henderson <rth@redhat.com>
PR debug/42234
* tree-ssa-dom.c (degenerate_phi_result): Check for NULL phi
argument earlier.
2009-12-06 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* doc/install.texi: Document MPC is required.

14
gcc/testsuite/gcc.c-torture/compile/pr42234.c Normal file
View File

@ -0,0 +1,14 @@
/* { dg-options "-g" } */
void
foo (int x)
{
struct S { int s; } d = { 1 };
unsigned int e = 1;
if (x)
e = x && d.s;
else
for (e = 0; e <= 3; e--)
;
e++;
}

4
gcc/tree-ssa-dom.c
View File

@ -2396,6 +2396,8 @@ degenerate_phi_result (gimple phi)
if (arg == lhs)
continue;
else if (!arg)
break;
else if (!val)
val = arg;
else if (arg == val)
@ -2403,7 +2405,7 @@ degenerate_phi_result (gimple phi)
/* We bring in some of operand_equal_p not only to speed things
up, but also to avoid crashing when dereferencing the type of
a released SSA name. */
else if (!arg || TREE_CODE (val) != TREE_CODE (arg)
else if (TREE_CODE (val) != TREE_CODE (arg)
|| TREE_CODE (val) == SSA_NAME
|| !operand_equal_p (arg, val, 0))
break;