diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr42730.c | 14 | ||||
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 4 |
4 files changed, 29 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 68edaec6716..a73cb95d90c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-01-13 Richard Guenther <rguenther@suse.de> + + PR tree-optimization/42730 + * tree-ssa-ccp.c (maybe_fold_stmt_indirect): Add shortcut for + offset zero. + 2010-01-13 Steve Ellcey <sje@cup.hp.com> PR target/pr42542 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 16a0e7852b0..6484dd8c618 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2010-01-13 Richard Guenther <rguenther@suse.de> + + PR tree-optimization/42730 + * gcc.c-torture/compile/pr42730.c: New testcase. + 2010-01-13 Steve Ellcey <sje@cup.hp.com> PR target/pr42542 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr42730.c b/gcc/testsuite/gcc.c-torture/compile/pr42730.c new file mode 100644 index 00000000000..89aaafe870a --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr42730.c @@ -0,0 +1,14 @@ +union bzz +{ + unsigned *pa; + void *pv; +}; + +void foo (void) +{ + union bzz u; + void **x; + void *y = 0; + x = &u.pv; + *x = y; +} diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index f3f113c902f..b40dba36d08 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -2120,6 +2120,10 @@ maybe_fold_stmt_indirect (tree expr, tree base, tree offset) && is_gimple_min_invariant (DECL_INITIAL (base))) return DECL_INITIAL (base); + /* If there is no offset involved simply return the folded base. */ + if (integer_zerop (offset)) + return base; + /* Try folding *(&B+O) to B.X. */ t = maybe_fold_offset_to_reference (loc, base_addr, offset, TREE_TYPE (expr)); |