re PR tree-optimization/67055 (Segmentation fault in fold_builtin_alloca_with_align in tree-ssa-ccp.c)

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.

From-SVN: r226616

gcc/ChangeLog

@@ -1,3 +1,11 @@
+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.
+
 2015-08-05  Kirill Yukhin  <kirill.yukhin@intel.com>
 
 	* config/i386/i386.md (define_attr "isa"): Addd avx512vl and

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2015-08-05  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/67055
+	* g++.dg/torture/pr67055.C: New testcase.
+
 2015-08-05  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/67109

gcc/testsuite/g++.dg/torture/pr67055.C

@@ -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);
+}

gcc/tree-ssa-ccp.c

@@ -2107,6 +2107,7 @@ fold_builtin_alloca_with_align (gimple stmt)
      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)