diff options
| author | Zdenek Dvorak <dvorakz@suse.cz> | 2005-06-13 16:59:40 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2005-06-13 14:59:40 +0000 |
| commit | adacecf105b889e4d7f9b48dea7895724f850d66 (patch) | |
| tree | 36256906046023419e83d36a7705ff6156e2b065 /gcc | |
| parent | 75d93ef719d09edfe18b2720e5cc05b8b7ec19da (diff) | |
| download | gcc-adacecf105b889e4d7f9b48dea7895724f850d66.zip gcc-adacecf105b889e4d7f9b48dea7895724f850d66.tar.gz gcc-adacecf105b889e4d7f9b48dea7895724f850d66.tar.bz2 | |
re PR middle-end/21985 (miscompiled or wrong code snippet?)
PR middle-end/21985
* fold-const.c (split_address_to_core_and_offset): Always return
the address of the base object.
* gcc.dg/tree-ssa/pr21985.c: New test.
From-SVN: r100877
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/fold-const.c | 4 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr21985.c | 32 |
4 files changed, 44 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 037a205..f325778 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2005-06-13 Zdenek Dvorak <dvorakz@suse.cz> + + PR middle-end/21985 + * fold-const.c (split_address_to_core_and_offset): Always return + the address of the base object. + 2005-06-13 Bernd Schmidt <bernd.schmidt@analog.com> * doc/invoke.texi (Blackfin Options): Document -mlong-calls. diff --git a/gcc/fold-const.c b/gcc/fold-const.c index af3f01c..2c1bd15 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -11801,9 +11801,7 @@ split_address_to_core_and_offset (tree exp, core = get_inner_reference (TREE_OPERAND (exp, 0), &bitsize, pbitpos, poffset, &mode, &unsignedp, &volatilep, false); - - if (TREE_CODE (core) == INDIRECT_REF) - core = TREE_OPERAND (core, 0); + core = build_fold_addr_expr (core); } else { diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 0baaf8a..42536ea 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2005-06-13 Zdenek Dvorak <dvorakz@suse.cz> + + PR middle-end/21985 + * gcc.dg/tree-ssa/pr21985.c: New test. + 2005-06-12 James A. Morrison <phython@gcc.gnu.org> * ggcc.dg/pr14796-1.c: Add tests for (X << C) >> C. diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr21985.c b/gcc/testsuite/gcc.dg/tree-ssa/pr21985.c new file mode 100644 index 0000000..e940310 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr21985.c @@ -0,0 +1,32 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-vars" } */ + +struct +{ + struct + { + int a; + int b; + } a[100]; +} a; + +void foo(unsigned); +unsigned *bar (void); + +int +main (void) +{ + unsigned *b = bar (); + + /* This should be folded. */ + foo (&a.a[50].a - &a.a[33].b); + foo ((unsigned) &a.a[50].b - (unsigned) &a); + + /* And this should not. */ + foo ((unsigned) &b - (unsigned) b); + return 0; +} + +/* Two of the calls to foo should be folded to just foo(constant). */ + +/* { dg-final { scan-tree-dump-times "foo \\(\[0-9\]*\\)" 2 "vars" } } */ |