re PR tree-optimization/15262 ([tree-ssa] Alias analyzer cannot handle addressable fields)
2004-08-22 Andrew Pinski <apinski@apple.com> PR c/15262 * c-typeck.c (build_unary_op): Use &a.b if the foldded lowered expression is not constant. (c_finish_return): Do not go through INDIRECT_REF when looking for the inner expression of an ADDR_EXPR for warning about. 2004-08-22 Andrew Pinski <apinski@apple.com> * g++.dg/opt/pr14029.C: New test. * gcc.c-torture/execute/pr15262.c: New test. 2004-08-22 Andrew Pinski <apinski@apple.com> PR c++/14029 * typeck.c (build_unary_op): Use &a.b if the foldded lowered expression is not constant. From-SVN: r86396
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@ -1,3 +1,11 @@
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2004-08-22 Andrew Pinski <apinski@apple.com>
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PR c/15262
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* c-typeck.c (build_unary_op): Use &a.b if the foldded lowered
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expression is not constant.
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(c_finish_return): Do not go through INDIRECT_REF when looking
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for the inner expression of an ADDR_EXPR for warning about.
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2004-08-22 Richard Henderson <rth@redhat.com>
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PR 17075
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@ -2538,9 +2538,14 @@ build_unary_op (enum tree_code code, tree xarg, int flag)
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addr = fold (build2 (PLUS_EXPR, argtype,
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convert (argtype, addr),
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convert (argtype, byte_position (field))));
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/* If the folded PLUS_EXPR is not a constant address, wrap
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it in an ADDR_EXPR. */
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if (!TREE_CONSTANT (addr))
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addr = build1 (ADDR_EXPR, argtype, arg);
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}
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else
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addr = build1 (code, argtype, arg);
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addr = build1 (ADDR_EXPR, argtype, arg);
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if (TREE_CODE (arg) == COMPOUND_LITERAL_EXPR)
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TREE_INVARIANT (addr) = TREE_CONSTANT (addr) = 1;
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@ -6310,7 +6315,8 @@ c_finish_return (tree retval)
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case ADDR_EXPR:
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inner = TREE_OPERAND (inner, 0);
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while (TREE_CODE_CLASS (TREE_CODE (inner)) == 'r')
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while (TREE_CODE_CLASS (TREE_CODE (inner)) == 'r'
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&& TREE_CODE (inner) != INDIRECT_REF)
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inner = TREE_OPERAND (inner, 0);
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if (DECL_P (inner)
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@ -1,3 +1,9 @@
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2004-08-22 Andrew Pinski <apinski@apple.com>
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PR c++/14029
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* typeck.c (build_unary_op): Use &a.b if the foldded lowered
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expression is not constant.
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2004-08-20 Mark Mitchell <mark@codesourcery.com>
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PR c++/17121
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@ -4123,6 +4123,11 @@ build_unary_op (enum tree_code code, tree xarg, int noconvert)
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addr = fold (build2 (PLUS_EXPR, argtype, rval,
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cp_convert (argtype,
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byte_position (field))));
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/* If the folded PLUS_EXPR is not a constant address, wrap
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it in an ADDR_EXPR. */
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if (!TREE_CONSTANT (addr))
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addr = build_address (arg);
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}
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if (TREE_CODE (argtype) == POINTER_TYPE
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@ -1,3 +1,8 @@
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2004-08-22 Andrew Pinski <apinski@apple.com>
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* g++.dg/opt/pr14029.C: New test.
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* gcc.c-torture/execute/pr15262.c: New test.
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2004-08-22 Tobias Schlueter <tobias.schlueter@physik.uni-muenchen.de>
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* gfortran.dg/reduction.f90: Add checks with complex arguments.
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@ -0,0 +1,41 @@
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// { dg-do run }
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// { dg-options "-O2" }
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// We used to mis-compile this testcase as we did not know that
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// &a+offsetof(b,a) was the same as &a.b
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struct Iterator {
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int * ptr;
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Iterator(int * i) : ptr(i) { }
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void operator++() { ++ptr; }
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int *const & base() const { return ptr; }
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};
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Iterator find_7(Iterator first, Iterator last)
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{
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int trip_count = (last.base() - first.base()) >> 1;
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for ( ; trip_count > 0 ; --trip_count) {
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if (*first.ptr == 7) return first;
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++first;
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if (*first.ptr == 7) return first;
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++first;
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}
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switch(last.base() - first.base()) {
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case 1:
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if (*first.ptr == 7) return first;
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++first;
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case 0:
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default:
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return last;
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}
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}
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int main() {
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int as[5] = {4,4,4,4,7};
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return (find_7(Iterator(&as[0]), Iterator(&as[5])).ptr == &as[5]);
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};
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@ -0,0 +1,48 @@
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/* We used to mis-compile this testcase as we did not know that
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&a+offsetof(b,a) was the same as &a.b */
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struct A
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{
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int t;
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int i;
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};
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void
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bar (float *p)
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{
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*p = 5.2;
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}
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int
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foo(struct A *locp, int i, int str)
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{
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float f, g, *p;
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int T355;
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int *T356;
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/* Currently, the alias analyzer has limited support for handling
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aliases of structure fields when no other variables are aliased.
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Introduce additional aliases to confuse it. */
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p = i ? &g : &f;
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bar (p);
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if (*p > 0.0)
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str = 1;
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T355 = locp->i;
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T356 = &locp->i;
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*T356 = str;
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T355 = locp->i;
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return T355;
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}
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main ()
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{
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struct A loc;
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int str;
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loc.i = 2;
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str = foo (&loc, 10, 3);
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if (str!=1)
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abort ();
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return 0;
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}
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