This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
[PATCH] Fix PR67055
- From: Richard Biener <rguenther at suse dot de>
- To: gcc-patches at gcc dot gnu dot org
- Date: Wed, 5 Aug 2015 11:55:00 +0200 (CEST)
- Subject: [PATCH] Fix PR67055
- Authentication-results: sourceware.org; auth=none
The inliner decides sth stupid here (IMHO - inlining a function into
a thunk) but at least we shouldn't crash (the tailcall in the thunk
has no BLOCK associated with it).
Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.
Richard.
2015-08-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/67055
* tree-ssa-ccp.c (fold_builtin_alloca_with_align): Handle
NULL gimple_block.
* g++.dg/torture/pr67055.C: New testcase.
Index: gcc/tree-ssa-ccp.c
===================================================================
--- gcc/tree-ssa-ccp.c (revision 226577)
+++ gcc/tree-ssa-ccp.c (working copy)
@@ -2107,6 +2120,7 @@ fold_builtin_alloca_with_align (gimple s
as a declared array, so we allow a larger size. */
block = gimple_block (stmt);
if (!(cfun->after_inlining
+ && block
&& TREE_CODE (BLOCK_SUPERCONTEXT (block)) == FUNCTION_DECL))
threshold /= 10;
if (size > threshold)
Index: gcc/testsuite/g++.dg/torture/pr67055.C
===================================================================
--- gcc/testsuite/g++.dg/torture/pr67055.C (revision 0)
+++ gcc/testsuite/g++.dg/torture/pr67055.C (working copy)
@@ -0,0 +1,44 @@
+// { dg-do compile }
+// { dg-additional-options "-std=c++14" }
+
+namespace std {
+ typedef __SIZE_TYPE__ size_t;
+ struct nothrow_t;
+}
+namespace vespamalloc {
+ void fn1(void *);
+ template <typename> class A {
+ public:
+ static unsigned long fillStack(unsigned long);
+ };
+ template <typename StackRep>
+ unsigned long A<StackRep>::fillStack(unsigned long p1) {
+ void *retAddr[p1];
+ fn1(retAddr);
+ }
+ class B {
+ protected:
+ B(void *);
+ };
+ template <int StackTraceLen> class D : B {
+ public:
+ D() : B(0) {}
+ void alloc(int) { A<int>::fillStack(StackTraceLen); }
+ };
+ template <typename, typename> class C {
+ public:
+ void *malloc(unsigned long);
+ };
+ template <typename MemBlockPtrT, typename ThreadListT>
+ void *C<MemBlockPtrT, ThreadListT>::malloc(unsigned long) {
+ MemBlockPtrT mem;
+ mem.alloc(0);
+ }
+ C<D<16>, int> *_GmemP;
+}
+void *operator new(std::size_t, std::nothrow_t &) noexcept {
+ return vespamalloc::_GmemP->malloc(0);
+}
+void *operator new[](std::size_t, std::nothrow_t &) noexcept {
+ return vespamalloc::_GmemP->malloc(0);
+}