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

re PR rtl-optimization/22167 (Strange optimization bug when using -Os) 

PR rtl-optimization/22167
	* gcse.c (hoist_code): Fix hoist_exprs[] check.

From-SVN: r102219
This commit is contained in:
Richard Sandiford 2005-07-21 06:51:25 +00:00 committed by Richard Sandiford
parent 5e5cbbfb8e
commit cb83c2ec41
4 changed files with 43 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2005-07-21 Richard Sandiford <richard@codesourcery.com>
PR rtl-optimization/22167
* gcse.c (hoist_code): Fix hoist_exprs[] check.
2005-07-20 Adam Nemet <anemet@lnxw.com>
* config/rs6000/lynx.h: Mark __do_global_ctors_aux and

2
gcc/gcse.c
View File

@ -4898,7 +4898,7 @@ hoist_code (void)
insn_inserted_p = 0;
/* These tests should be the same as the tests above. */
if (TEST_BIT (hoist_vbeout[bb->index], i))
if (TEST_BIT (hoist_exprs[bb->index], i))
{
/* We've found a potentially hoistable expression, now
we look at every block BB dominates to see if it

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2005-07-21 Richard Sandiford <richard@codesourcery.com>
PR rtl-optimization/22167
* g++.dg/opt/pr22167.C: New test.
2005-07-20 Douglas Gregor <doug.gregor@gmail.com>
PR c++/2922

32
gcc/testsuite/g++.dg/opt/pr22167.C Normal file
View File

@ -0,0 +1,32 @@
// Derived from PR22167, which failed on some RISC targets. The call to
// foo() has two successors, one normal and one exceptional, and both
// successors use &a[0] and x. Expressions involving &a[0] can be hoisted
// before the call but those involving x cannot.
// { dg-options "-Os" }
// { dg-do run }
int a[4];
struct S {
S() : x (0) {}
~S() { a[0] = x; }
int x;
};
void
foo (int *x)
{
if (*x == 1)
throw 1;
*x = 1;
}
int
main()
{
S s;
foo (&s.x);
if (a[0] == s.x)
a[0]++;
return a[0];
}