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8.0.1-0.15

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Jakub Jelinek 2018-02-21 00:51:11 +01:00
parent d301a3c7b8
commit 16819750d2
4 changed files with 207 additions and 4 deletions
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1
.gitignore vendored
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@ -37,3 +37,4 @@
/gcc-8.0.1-20180207.tar.xz
/gcc-8.0.1-20180210.tar.xz
/gcc-8.0.1-20180218.tar.xz
/gcc-8.0.1-20180220.tar.xz

20
gcc.spec
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@ -1,10 +1,10 @@
%global DATE 20180218
%global SVNREV 257796
%global DATE 20180220
%global SVNREV 257865
%global gcc_version 8.0.1
%global gcc_major 8
# Note, gcc_release must be integer, if you want to add suffixes to
# %%{release}, append them after %%{gcc_release} on Release: line.
%global gcc_release 0.14
%global gcc_release 0.15
%global nvptx_tools_gitrev c28050f60193b3b95a18866a96f03334e874e78f
%global nvptx_newlib_gitrev aadc8eb0ec43b7cd0dd2dfb484bae63c8b05ef24
%global _unpackaged_files_terminate_build 0
@ -235,6 +235,7 @@ Patch9: gcc8-aarch64-async-unw-tables.patch
Patch10: gcc8-foffload-default.patch
Patch11: gcc8-Wno-format-security.patch
Patch12: gcc8-rh1512529-aarch64.patch
Patch13: gcc8-pr84478.patch
Patch1000: nvptx-tools-no-ptxas.patch
Patch1001: nvptx-tools-build.patch
@ -794,6 +795,7 @@ to NVidia PTX capable devices if available.
%patch10 -p0 -b .foffload-default~
%patch11 -p0 -b .Wno-format-security~
%patch12 -p0 -b .rh1512529-aarch64~
%patch13 -p0 -b .pr84478~
cd nvptx-tools-%{nvptx_tools_gitrev}
%patch1000 -p1 -b .nvptx-tools-no-ptxas~
@ -3052,6 +3054,18 @@ fi
%endif
%changelog
* Tue Feb 20 2018 Jakub Jelinek <jakub@redhat.com> 8.0.1-0.15
- update from the trunk
- PRs c++/84348, c++/84429, c++/84430, c++/84444, c++/84445, c++/84446,
c++/84448, c++/84449, c++/84455, c++/84488, c/81272, c/84310,
driver/83193, fortran/35339, fortran/48890, fortran/83823,
middle-end/79257, middle-end/82004, middle-end/82123,
middle-end/84095, middle-end/84406, other/80589, sanitizer/82183,
target/79747, target/84148, target/84460, tree-optimization/81592,
tree-optimization/82491, tree-optimization/84419,
tree-optimization/84452
- fix strlen value range computation (#1546964, PR tree-optimization/84478)
* Sun Feb 18 2018 Jakub Jelinek <jakub@redhat.com> 8.0.1-0.14
- update from the trunk
- PRs ada/84277, bootstrap/82939, bootstrap/84405, c++/79064, c++/79626,

188
gcc8-pr84478.patch Normal file
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@ -0,0 +1,188 @@
2018-02-20 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/84478
* gimple-fold.c (get_range_strlen): Make minlen const and assume it
can't be NULL. Add type 3 support which is conservatively correct
in PHIs. Formatting and comment capitalization fixes. Add warning
that the 2 argument get_range_strlen is only usable for warnings.
(gimple_fold_builtin_strlen): Use the 6 arg get_range_strlen overload
rather than 2 arg, use it only if it returns true and flexarray is
false, pass 3 as type to it.
* gcc.c-torture/execute/pr84478.c: New test.
--- gcc/gimple-fold.c.jj 2018-02-19 19:57:03.424279589 +0100
+++ gcc/gimple-fold.c 2018-02-20 16:21:34.583020305 +0100
@@ -1283,10 +1283,11 @@ gimple_fold_builtin_memset (gimple_stmt_
value of ARG in LENGTH[0] and LENGTH[1], respectively.
If ARG is an SSA name variable, follow its use-def chains. When
TYPE == 0, if LENGTH[1] is not equal to the length we determine or
- if we are unable to determine the length or value, return False.
+ if we are unable to determine the length or value, return false.
VISITED is a bitmap of visited variables.
TYPE is 0 if string length should be obtained, 1 for maximum string
- length and 2 for maximum value ARG can have.
+ length and 2 for maximum value ARG can have, 3 is like 1, but provide
+ conservatively correct rather than optimistic answer.
When FUZZY is set and the length of a string cannot be determined,
the function instead considers as the maximum possible length the
size of a character array it may refer to.
@@ -1302,9 +1303,8 @@ get_range_strlen (tree arg, tree length[
tree var, val = NULL_TREE;
gimple *def_stmt;
- /* The minimum and maximum length. The MAXLEN pointer stays unchanged
- but MINLEN may be cleared during the execution of the function. */
- tree *minlen = length;
+ /* The minimum and maximum length. */
+ tree *const minlen = length;
tree *const maxlen = length + 1;
if (TREE_CODE (arg) != SSA_NAME)
@@ -1445,12 +1445,11 @@ get_range_strlen (tree arg, tree length[
if (!val)
return false;
- if (minlen
- && (!*minlen
- || (type > 0
- && TREE_CODE (*minlen) == INTEGER_CST
- && TREE_CODE (val) == INTEGER_CST
- && tree_int_cst_lt (val, *minlen))))
+ if (!*minlen
+ || (type > 0
+ && TREE_CODE (*minlen) == INTEGER_CST
+ && TREE_CODE (val) == INTEGER_CST
+ && tree_int_cst_lt (val, *minlen)))
*minlen = val;
if (*maxlen)
@@ -1503,18 +1502,16 @@ get_range_strlen (tree arg, tree length[
{
tree op2 = gimple_assign_rhs2 (def_stmt);
tree op3 = gimple_assign_rhs3 (def_stmt);
- return get_range_strlen (op2, length, visited, type, fuzzy, flexp)
- && get_range_strlen (op3, length, visited, type, fuzzy, flexp);
+ return (get_range_strlen (op2, length, visited, type, fuzzy, flexp)
+ && get_range_strlen (op3, length, visited, type, fuzzy,
+ flexp));
}
return false;
case GIMPLE_PHI:
- {
- /* All the arguments of the PHI node must have the same constant
- length. */
- unsigned i;
-
- for (i = 0; i < gimple_phi_num_args (def_stmt); i++)
+ /* All the arguments of the PHI node must have the same constant
+ length. */
+ for (unsigned i = 0; i < gimple_phi_num_args (def_stmt); i++)
{
tree arg = gimple_phi_arg (def_stmt, i)->def;
@@ -1529,13 +1526,12 @@ get_range_strlen (tree arg, tree length[
if (!get_range_strlen (arg, length, visited, type, fuzzy, flexp))
{
- if (fuzzy)
+ if (fuzzy && type != 3)
*maxlen = build_all_ones_cst (size_type_node);
else
return false;
}
}
- }
return true;
default:
@@ -1554,7 +1550,10 @@ get_range_strlen (tree arg, tree length[
Return true if the range of the string lengths has been obtained
from the upper bound of an array at the end of a struct. Such
an array may hold a string that's longer than its upper bound
- due to it being used as a poor-man's flexible array member. */
+ due to it being used as a poor-man's flexible array member.
+
+ This function should be only used for warning code, as it doesn't
+ handle PHIs in a conservatively correct way. */
bool
get_range_strlen (tree arg, tree minmaxlen[2])
@@ -3533,8 +3532,12 @@ gimple_fold_builtin_strlen (gimple_stmt_
wide_int minlen;
wide_int maxlen;
- tree lenrange[2];
- if (!get_range_strlen (gimple_call_arg (stmt, 0), lenrange)
+ tree lenrange[2] = { NULL_TREE, NULL_TREE };
+ bitmap visited = NULL;
+ bool flexarray = false;
+ if (get_range_strlen (gimple_call_arg (stmt, 0), lenrange, &visited,
+ 3, true, &flexarray)
+ && !flexarray
&& lenrange[0] && TREE_CODE (lenrange[0]) == INTEGER_CST
&& lenrange[1] && TREE_CODE (lenrange[1]) == INTEGER_CST)
{
@@ -3554,6 +3557,9 @@ gimple_fold_builtin_strlen (gimple_stmt_
maxlen = wi::to_wide (max_object_size (), prec) - 2;
}
+ if (visited)
+ BITMAP_FREE (visited);
+
if (minlen == maxlen)
{
lenrange[0] = force_gimple_operand_gsi (gsi, lenrange[0], true, NULL,
--- gcc/testsuite/gcc.c-torture/execute/pr84478.c.jj 2018-02-20 16:32:00.683086212 +0100
+++ gcc/testsuite/gcc.c-torture/execute/pr84478.c 2018-02-20 16:31:33.497081640 +0100
@@ -0,0 +1,49 @@
+/* PR tree-optimization/84478 */
+
+long poolptr;
+unsigned char *strpool;
+static const char *poolfilearr[] = {
+ "mu",
+ "",
+#define A "x",
+#define B A "xx", A A "xxx", A A A A A
+#define C B B B B B B B B B B
+#define D C C C C C C C C C C
+ D C C C C C C C B B B
+ ((void *)0)
+};
+
+__attribute__((noipa)) long
+makestring (void)
+{
+ return 1;
+}
+
+__attribute__((noipa)) long
+loadpoolstrings (long spare_size)
+{
+ const char *s;
+ long g = 0;
+ int i = 0, j = 0;
+ while ((s = poolfilearr[j++]))
+ {
+ int l = __builtin_strlen (s);
+ i += l;
+ if (i >= spare_size) return 0;
+ while (l-- > 0) strpool[poolptr++] = *s++;
+ g = makestring ();
+ }
+ return g;
+}
+
+int
+main ()
+{
+ strpool = __builtin_malloc (4000);
+ if (!strpool)
+ return 0;
+ asm volatile ("" : : : "memory");
+ volatile int r = loadpoolstrings (4000);
+ __builtin_free (strpool);
+ return 0;
+}

2
sources
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@ -1,3 +1,3 @@
SHA512 (gcc-8.0.1-20180218.tar.xz) = a230134977b5137b19d7a40f8997da98d39e7653b3b009c68ed830d08fc5cbc76c0ba97ecc91501ba2bca899d46230f61881c8cc20277453d9ab06906f463cbd
SHA512 (gcc-8.0.1-20180220.tar.xz) = 9bd9bf073086bbeef85e15bd7abeb8754a1f6abe9cb98a6826e4c147ed7407f38721357e79cd842d8803e55fac8b050ac5cd59ed19f1cd30b5133d67f271d7c2
SHA512 (nvptx-newlib-aadc8eb0ec43b7cd0dd2dfb484bae63c8b05ef24.tar.xz) = 94f7089365296f7dfa485107b4143bebc850a81586f3460fd896bbbb6ba099a00217d4042133424fd2183b352132f4fd367e6a60599bdae2a26dfd48a77d0e04
SHA512 (nvptx-tools-c28050f60193b3b95a18866a96f03334e874e78f.tar.xz) = a688cb12cf805950a5abbb13b52f45c81dbee98e310b7ed57ae20e76dbfa5964a16270148374a6426d177db71909d28360490f091c86a5d19d4faa5127beeee1