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| author | Andrew Hsieh <andrewhsieh@google.com> | 2013-05-27 09:29:24 +0800 |
|---|---|---|
| committer | Andrew Hsieh <andrewhsieh@google.com> | 2013-05-27 09:33:02 +0800 |
| commit | 53ac5cd1ae9fe073c4c14d3e068f778bfc1999d4 (patch) | |
| tree | d16a9d616bbbb92f26ba2d41196a0daf381203c8 /gcc-4.4.3 | |
| parent | f63aa0156b8ef6b30304890529cbf642e8f78ebd (diff) | |
| download | toolchain_gcc-53ac5cd1ae9fe073c4c14d3e068f778bfc1999d4.tar.gz toolchain_gcc-53ac5cd1ae9fe073c4c14d3e068f778bfc1999d4.tar.bz2 toolchain_gcc-53ac5cd1ae9fe073c4c14d3e068f778bfc1999d4.zip | |
[4.4.3] Backport of the patch from trunk/4.8 for fixing issue 54623
2013-05-24 Alexander Ivchenko <alexander.ivchenko@intel.com>
PR tree-ssa/57385
* tree-ssa-sccvn.c (fully_constant_vn_reference_p): Check
that index is not negative.
See f63aa0156b8ef6b30304890529cbf642e8f78ebd and
https://code.google.com/p/android/issues/detail?id=54623
Change-Id: I3dbba928565414575b9438bb1467fec21506fbc8
Diffstat (limited to 'gcc-4.4.3')
| -rw-r--r-- | gcc-4.4.3/gcc/testsuite/gcc.dg/tree-ssa/pr57385.c | 10 | ||||
| -rw-r--r-- | gcc-4.4.3/gcc/tree-ssa-ccp.c | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gcc-4.4.3/gcc/testsuite/gcc.dg/tree-ssa/pr57385.c b/gcc-4.4.3/gcc/testsuite/gcc.dg/tree-ssa/pr57385.c new file mode 100644 index 000000000..fc2146126 --- /dev/null +++ b/gcc-4.4.3/gcc/testsuite/gcc.dg/tree-ssa/pr57385.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ +/* { dg-options "-O1" } */ + +int c; + +void foo(int f) +{ + int wbi=-100000000; + c = (f ? "012346000000000000":"01345:000000006008")[wbi]; +} diff --git a/gcc-4.4.3/gcc/tree-ssa-ccp.c b/gcc-4.4.3/gcc/tree-ssa-ccp.c index 6f15c0c42..f029e0dfe 100644 --- a/gcc-4.4.3/gcc/tree-ssa-ccp.c +++ b/gcc-4.4.3/gcc/tree-ssa-ccp.c @@ -1238,6 +1238,7 @@ fold_const_aggregate_ref (tree t) && (GET_MODE_CLASS (TYPE_MODE (TREE_TYPE (TREE_TYPE (ctor)))) == MODE_INT) && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (ctor)))) == 1 + && tree_int_cst_sgn (idx) >= 0 && compare_tree_int (idx, TREE_STRING_LENGTH (ctor)) < 0) return build_int_cst_type (TREE_TYPE (t), (TREE_STRING_POINTER (ctor) |