[ARM] PR 68143 Properly update memory offsets when expanding setmem

	PR target/68143
	* config/arm/arm.c (arm_block_set_unaligned_vect): Keep track of
	offset from dstbase and use it appropriately in
	adjust_automodify_address.
	(arm_block_set_aligned_vect): Likewise.

	* gcc.c-torture/execute/pr68143_1.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230462 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5543cb6..23de980 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2015-11-17  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       PR target/68143
+       * config/arm/arm.c (arm_block_set_unaligned_vect): Keep track of
+       offset from dstbase and use it appropriately in
+       adjust_automodify_address.
+       (arm_block_set_aligned_vect): Likewise.
+
 2015-11-17  Eric Botcazou  <ebotcazou@adacore.com>
 
        * config/visium/t-visium (MULTILIB_OPTIONS): Add muser-mode.

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index c839f52..c3c0c93 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -29164,7 +29164,7 @@ arm_block_set_unaligned_vect (rtx dstbase,
   rtx (*gen_func) (rtx, rtx);
   machine_mode mode;
   unsigned HOST_WIDE_INT v = value;
-
+  unsigned int offset = 0;
   gcc_assert ((align & 0x3) != 0);
   nelt_v8 = GET_MODE_NUNITS (V8QImode);
   nelt_v16 = GET_MODE_NUNITS (V16QImode);
@@ -29185,7 +29185,7 @@ arm_block_set_unaligned_vect (rtx dstbase,
     return false;
 
   dst = copy_addr_to_reg (XEXP (dstbase, 0));
-  mem = adjust_automodify_address (dstbase, mode, dst, 0);
+  mem = adjust_automodify_address (dstbase, mode, dst, offset);
 
   v = sext_hwi (v, BITS_PER_WORD);
   val_elt = GEN_INT (v);
@@ -29202,7 +29202,11 @@ arm_block_set_unaligned_vect (rtx dstbase,
     {
       emit_insn ((*gen_func) (mem, reg));
       if (i + 2 * nelt_mode <= length)
-       emit_insn (gen_add2_insn (dst, GEN_INT (nelt_mode)));
+       {
+         emit_insn (gen_add2_insn (dst, GEN_INT (nelt_mode)));
+         offset += nelt_mode;
+         mem = adjust_automodify_address (dstbase, mode, dst, offset);
+       }
     }
 
   /* If there are not less than nelt_v8 bytes leftover, we must be in
@@ -29213,6 +29217,9 @@ arm_block_set_unaligned_vect (rtx dstbase,
   if (i + nelt_v8 < length)
     {
       emit_insn (gen_add2_insn (dst, GEN_INT (length - i)));
+      offset += length - i;
+      mem = adjust_automodify_address (dstbase, mode, dst, offset);
+
       /* We are shifting bytes back, set the alignment accordingly.  */
       if ((length & 1) != 0 && align >= 2)
        set_mem_align (mem, BITS_PER_UNIT);
@@ -29223,12 +29230,13 @@ arm_block_set_unaligned_vect (rtx dstbase,
   else if (i < length && i + nelt_v8 >= length)
     {
       if (mode == V16QImode)
-       {
-         reg = gen_lowpart (V8QImode, reg);
-         mem = adjust_automodify_address (dstbase, V8QImode, dst, 0);
-       }
+       reg = gen_lowpart (V8QImode, reg);
+
       emit_insn (gen_add2_insn (dst, GEN_INT ((length - i)
                                              + (nelt_mode - nelt_v8))));
+      offset += (length - i) + (nelt_mode - nelt_v8);
+      mem = adjust_automodify_address (dstbase, V8QImode, dst, offset);
+
       /* We are shifting bytes back, set the alignment accordingly.  */
       if ((length & 1) != 0 && align >= 2)
        set_mem_align (mem, BITS_PER_UNIT);
@@ -29255,6 +29263,7 @@ arm_block_set_aligned_vect (rtx dstbase,
   rtx rval[MAX_VECT_LEN];
   machine_mode mode;
   unsigned HOST_WIDE_INT v = value;
+  unsigned int offset = 0;
 
   gcc_assert ((align & 0x3) == 0);
   nelt_v8 = GET_MODE_NUNITS (V8QImode);
@@ -29286,14 +29295,15 @@ arm_block_set_aligned_vect (rtx dstbase,
   /* Handle first 16 bytes specially using vst1:v16qi instruction.  */
   if (mode == V16QImode)
     {
-      mem = adjust_automodify_address (dstbase, mode, dst, 0);
+      mem = adjust_automodify_address (dstbase, mode, dst, offset);
       emit_insn (gen_movmisalignv16qi (mem, reg));
       i += nelt_mode;
       /* Handle (8, 16) bytes leftover using vst1:v16qi again.  */
       if (i + nelt_v8 < length && i + nelt_v16 > length)
        {
          emit_insn (gen_add2_insn (dst, GEN_INT (length - nelt_mode)));
-         mem = adjust_automodify_address (dstbase, mode, dst, 0);
+         offset += length - nelt_mode;
+         mem = adjust_automodify_address (dstbase, mode, dst, offset);
          /* We are shifting bytes back, set the alignment accordingly.  */
          if ((length & 0x3) == 0)
            set_mem_align (mem, BITS_PER_UNIT * 4);
@@ -29315,7 +29325,7 @@ arm_block_set_aligned_vect (rtx dstbase,
   for (; (i + nelt_mode <= length); i += nelt_mode)
     {
       addr = plus_constant (Pmode, dst, i);
-      mem = adjust_automodify_address (dstbase, mode, addr, i);
+      mem = adjust_automodify_address (dstbase, mode, addr, offset + i);
       emit_move_insn (mem, reg);
     }
 
@@ -29324,8 +29334,8 @@ arm_block_set_aligned_vect (rtx dstbase,
   if (i + UNITS_PER_WORD == length)
     {
       addr = plus_constant (Pmode, dst, i - UNITS_PER_WORD);
-      mem = adjust_automodify_address (dstbase, mode,
-                                      addr, i - UNITS_PER_WORD);
+      offset += i - UNITS_PER_WORD;
+      mem = adjust_automodify_address (dstbase, mode, addr, offset);
       /* We are shifting 4 bytes back, set the alignment accordingly.  */
       if (align > UNITS_PER_WORD)
        set_mem_align (mem, BITS_PER_UNIT * UNITS_PER_WORD);
@@ -29337,7 +29347,8 @@ arm_block_set_aligned_vect (rtx dstbase,
   else if (i < length)
     {
       emit_insn (gen_add2_insn (dst, GEN_INT (length - nelt_mode)));
-      mem = adjust_automodify_address (dstbase, mode, dst, 0);
+      offset += length - nelt_mode;
+      mem = adjust_automodify_address (dstbase, mode, dst, offset);
       /* We are shifting bytes back, set the alignment accordingly.  */
       if ((length & 1) == 0)
        set_mem_align (mem, BITS_PER_UNIT * 2);

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 079bbf1..9f65ab5 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-17  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       PR target/68143
+       * gcc.c-torture/execute/pr68143_1.c: New test.
+
 2015-11-17  Uros Bizjak  <ubizjak@gmail.com>
 
        * gcc.dg/torture/pr68264.c: Use dg-add-options ieee.

diff --git a/gcc/testsuite/gcc.c-torture/execute/pr68143_1.c b/gcc/testsuite/gcc.c-torture/execute/pr68143_1.c
new file mode 100644 (file)
index 0000000..cbfbbc2
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/pr68143_1.c
@@ -0,0 +1,31 @@
+#define NULL 0
+
+struct stuff
+{
+    int a;
+    int b;
+    int c;
+    int d;
+    int e;
+    char *f;
+    int g;
+};
+
+void __attribute__ ((noinline))
+bar (struct stuff *x)
+{
+  if (x->g != 2)
+    __builtin_abort ();
+}
+
+int
+main (int argc, char** argv)
+{
+  struct stuff x = {0, 0, 0, 0, 0, NULL, 0};
+  x.a = 100;
+  x.d = 100;
+  x.g = 2;
+  /* Struct should now look like {100, 0, 0, 100, 0, 0, 0, 2}.  */
+  bar (&x);
+  return 0;
+}