* expr.c (expand_assignment): Reenable bitfield += optimizations.

	Use alias set 0 for memory, do proper mode calculations and adjust
	address for memories.

	* gcc.c-torture/execute/20040709-1.c: New test.
	* gcc.c-torture/execute/20040709-2.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@84722 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 300 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.c-torture/execute/20040709-1.c b/gcc/testsuite/gcc.c-torture/execute/20040709-1.c
new file mode 100644
index 00000000000..455313ade18
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/20040709-1.c
@@ -0,0 +1,147 @@
+/* Test arithmetics on bitfields.  */
+
+extern void abort (void);
+extern void exit (int);
+
+unsigned int
+myrnd (void)
+{
+  static unsigned int s = 1388815473;
+  s *= 1103515245;
+  s += 12345;
+  return (s / 65536) % 2048;
+}
+
+#define T(S)					\
+struct S s##S;					\
+struct S retme##S (struct S x)			\
+{						\
+  return x;					\
+}						\
+						\
+unsigned int fn1##S (unsigned int x)		\
+{						\
+  struct S y = s##S;				\
+  y.k += x;					\
+  y = retme##S (y);				\
+  return y.k;					\
+}						\
+						\
+unsigned int fn2##S (unsigned int x)		\
+{						\
+  struct S y = s##S;				\
+  y.k += x;					\
+  y.k %= 15;					\
+  return y.k;					\
+}						\
+						\
+unsigned int retit##S (void)			\
+{						\
+  return s##S.k;				\
+}						\
+						\
+unsigned int fn3##S (unsigned int x)		\
+{						\
+  s##S.k += x;					\
+  return retit##S ();				\
+}						\
+						\
+void test##S (void)				\
+{						\
+  int i;					\
+  unsigned int mask, v, a, r;			\
+  struct S x;					\
+  char *p = (char *) &s##S;			\
+  for (i = 0; i < sizeof (s##S); ++i)		\
+    *p++ = myrnd ();				\
+  if (__builtin_classify_type (s##S.l) == 8)	\
+    s##S.l = 5.25;				\
+  s##S.k = -1;					\
+  mask = s##S.k;				\
+  v = myrnd ();					\
+  a = myrnd ();					\
+  s##S.k = v;					\
+  x = s##S;					\
+  r = fn1##S (a);				\
+  if (x.i != s##S.i || x.j != s##S.j		\
+      || x.k != s##S.k || x.l != s##S.l		\
+      || ((v + a) & mask) != r)			\
+    abort ();					\
+  v = myrnd ();					\
+  a = myrnd ();					\
+  s##S.k = v;					\
+  x = s##S;					\
+  r = fn2##S (a);				\
+  if (x.i != s##S.i || x.j != s##S.j		\
+      || x.k != s##S.k || x.l != s##S.l		\
+      || ((((v + a) & mask) % 15) & mask) != r)	\
+    abort ();					\
+  v = myrnd ();					\
+  a = myrnd ();					\
+  s##S.k = v;					\
+  x = s##S;					\
+  r = fn3##S (a);				\
+  if (x.i != s##S.i || x.j != s##S.j		\
+      || s##S.k != r || x.l != s##S.l		\
+      || ((v + a) & mask) != r)			\
+    abort ();					\
+}
+
+struct A { unsigned int i : 6, l : 1, j : 10, k : 15; }; T(A)
+struct B { unsigned int i : 6, j : 11, k : 15; unsigned int l; }; T(B)
+struct C { unsigned int l; unsigned int i : 6, j : 11, k : 15; }; T(C)
+struct D { unsigned long long l : 6, i : 6, j : 23, k : 29; }; T(D)
+struct E { unsigned long long l, i : 12, j : 23, k : 29; }; T(E)
+struct F { unsigned long long i : 12, j : 23, k : 29, l; }; T(F)
+struct G { unsigned int i : 12, j : 13, k : 7; unsigned long long l; }; T(G)
+struct H { unsigned int i : 12, j : 11, k : 9; unsigned long long l; }; T(H)
+struct I { unsigned short i : 1, j : 6, k : 9; unsigned long long l; }; T(I)
+struct J { unsigned short i : 1, j : 8, k : 7; unsigned short l; }; T(J)
+struct K { unsigned int k : 6, l : 1, j : 10, i : 15; }; T(K)
+struct L { unsigned int k : 6, j : 11, i : 15; unsigned int l; }; T(L)
+struct M { unsigned int l; unsigned int k : 6, j : 11, i : 15; }; T(M)
+struct N { unsigned long long l : 6, k : 6, j : 23, i : 29; }; T(N)
+struct O { unsigned long long l, k : 12, j : 23, i : 29; }; T(O)
+struct P { unsigned long long k : 12, j : 23, i : 29, l; }; T(P)
+struct Q { unsigned int k : 12, j : 13, i : 7; unsigned long long l; }; T(Q)
+struct R { unsigned int k : 12, j : 11, i : 9; unsigned long long l; }; T(R)
+struct S { unsigned short k : 1, j : 6, i : 9; unsigned long long l; }; T(S)
+struct T { unsigned short k : 1, j : 8, i : 7; unsigned short l; }; T(T)
+struct U { unsigned short j : 6, k : 1, i : 9; unsigned long long l; }; T(U)
+struct V { unsigned short j : 8, k : 1, i : 7; unsigned short l; }; T(V)
+struct W { long double l; unsigned int k : 12, j : 13, i : 7; }; T(W)
+struct X { unsigned int k : 12, j : 13, i : 7; long double l; }; T(X)
+struct Y { unsigned int k : 12, j : 11, i : 9; long double l; }; T(Y)
+struct Z { long double l; unsigned int j : 13, i : 7, k : 12; }; T(Z)
+
+int
+main (void)
+{
+  testA ();
+  testB ();
+  testC ();
+  testD ();
+  testE ();
+  testF ();
+  testG ();
+  testH ();
+  testI ();
+  testJ ();
+  testK ();
+  testL ();
+  testM ();
+  testN ();
+  testO ();
+  testP ();
+  testQ ();
+  testR ();
+  testS ();
+  testT ();
+  testU ();
+  testV ();
+  testW ();
+  testX ();
+  testY ();
+  testZ ();
+  exit (0);
+}
diff --git a/gcc/testsuite/gcc.c-torture/execute/20040709-2.c b/gcc/testsuite/gcc.c-torture/execute/20040709-2.c
new file mode 100644
index 00000000000..f06811c24b3
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/20040709-2.c
@@ -0,0 +1,153 @@
+/* Test arithmetics on bitfields.  */
+
+extern void abort (void);
+extern void exit (int);
+
+unsigned int
+myrnd (void)
+{
+  static unsigned int s = 1388815473;
+  s *= 1103515245;
+  s += 12345;
+  return (s / 65536) % 2048;
+}
+
+#define T(S)					\
+struct S s##S;					\
+struct S retme##S (struct S x)			\
+{						\
+  return x;					\
+}						\
+						\
+unsigned int fn1##S (unsigned int x)		\
+{						\
+  struct S y = s##S;				\
+  y.k += x;					\
+  y = retme##S (y);				\
+  return y.k;					\
+}						\
+						\
+unsigned int fn2##S (unsigned int x)		\
+{						\
+  struct S y = s##S;				\
+  y.k += x;					\
+  y.k %= 15;					\
+  return y.k;					\
+}						\
+						\
+unsigned int retit##S (void)			\
+{						\
+  return s##S.k;				\
+}						\
+						\
+unsigned int fn3##S (unsigned int x)		\
+{						\
+  s##S.k += x;					\
+  return retit##S ();				\
+}						\
+						\
+void test##S (void)				\
+{						\
+  int i;					\
+  unsigned int mask, v, a, r;			\
+  struct S x;					\
+  char *p = (char *) &s##S;			\
+  for (i = 0; i < sizeof (s##S); ++i)		\
+    *p++ = myrnd ();				\
+  if (__builtin_classify_type (s##S.l) == 8)	\
+    s##S.l = 5.25;				\
+  s##S.k = -1;					\
+  mask = s##S.k;				\
+  v = myrnd ();					\
+  a = myrnd ();					\
+  s##S.k = v;					\
+  x = s##S;					\
+  r = fn1##S (a);				\
+  if (x.i != s##S.i || x.j != s##S.j		\
+      || x.k != s##S.k || x.l != s##S.l		\
+      || ((v + a) & mask) != r)			\
+    abort ();					\
+  v = myrnd ();					\
+  a = myrnd ();					\
+  s##S.k = v;					\
+  x = s##S;					\
+  r = fn2##S (a);				\
+  if (x.i != s##S.i || x.j != s##S.j		\
+      || x.k != s##S.k || x.l != s##S.l		\
+      || ((((v + a) & mask) % 15) & mask) != r)	\
+    abort ();					\
+  v = myrnd ();					\
+  a = myrnd ();					\
+  s##S.k = v;					\
+  x = s##S;					\
+  r = fn3##S (a);				\
+  if (x.i != s##S.i || x.j != s##S.j		\
+      || s##S.k != r || x.l != s##S.l		\
+      || ((v + a) & mask) != r)			\
+    abort ();					\
+}
+
+#ifdef __powerpc64__
+/* Temporary hack for broken PPC64 unaligned handling PR rtl-optimization/13674 */
+# define pck
+#else
+# define pck __attribute__((packed))
+#endif
+struct pck A { unsigned short i : 1, l : 1, j : 3, k : 11; }; T(A)
+struct pck B { unsigned short i : 4, j : 1, k : 11; unsigned int l; }; T(B)
+struct pck C { unsigned int l; unsigned short i : 4, j : 1, k : 11; }; T(C)
+struct pck D { unsigned long long l : 6, i : 6, j : 23, k : 29; }; T(D)
+struct pck E { unsigned long long l, i : 12, j : 23, k : 29; }; T(E)
+struct pck F { unsigned long long i : 12, j : 23, k : 29, l; }; T(F)
+struct pck G { unsigned short i : 1, j : 1, k : 6; unsigned long long l; }; T(G)
+struct pck H { unsigned short i : 6, j : 2, k : 8; unsigned long long l; }; T(H)
+struct pck I { unsigned short i : 1, j : 6, k : 1; unsigned long long l; }; T(I)
+struct pck J { unsigned short i : 1, j : 8, k : 7; unsigned short l; }; T(J)
+struct pck K { unsigned int k : 6, l : 1, j : 10, i : 15; }; T(K)
+struct pck L { unsigned int k : 6, j : 11, i : 15; unsigned int l; }; T(L)
+struct pck M { unsigned int l; unsigned short k : 6, j : 11, i : 15; }; T(M)
+struct pck N { unsigned long long l : 6, k : 6, j : 23, i : 29; }; T(N)
+struct pck O { unsigned long long l, k : 12, j : 23, i : 29; }; T(O)
+struct pck P { unsigned long long k : 12, j : 23, i : 29, l; }; T(P)
+struct pck Q { unsigned short k : 12, j : 1, i : 3; unsigned long long l; }; T(Q)
+struct pck R { unsigned short k : 2, j : 11, i : 3; unsigned long long l; }; T(R)
+struct pck S { unsigned short k : 1, j : 6, i : 9; unsigned long long l; }; T(S)
+struct pck T { unsigned short k : 1, j : 8, i : 7; unsigned short l; }; T(T)
+struct pck U { unsigned short j : 6, k : 1, i : 9; unsigned long long l; }; T(U)
+struct pck V { unsigned short j : 8, k : 1, i : 7; unsigned short l; }; T(V)
+struct pck W { long double l; unsigned int k : 12, j : 13, i : 7; }; T(W)
+struct pck X { unsigned int k : 12, j : 13, i : 7; long double l; }; T(X)
+struct pck Y { unsigned int k : 12, j : 11, i : 9; long double l; }; T(Y)
+struct pck Z { long double l; unsigned int j : 13, i : 7, k : 12; }; T(Z)
+
+int
+main (void)
+{
+  testA ();
+  testB ();
+  testC ();
+  testD ();
+  testE ();
+  testF ();
+  testG ();
+  testH ();
+  testI ();
+  testJ ();
+  testK ();
+  testL ();
+  testM ();
+  testN ();
+  testO ();
+  testP ();
+  testQ ();
+  testR ();
+  testS ();
+  testT ();
+  testU ();
+  testV ();
+  testW ();
+  testX ();
+  testY ();
+  testZ ();
+  exit (0);
+}