Hi! VAX GAS has a glitch when generating a 64bit value from a small negative integer, which isn't properly sign-extended. (I'll see if this can be fixed without breaking other cases.)
However, GCC should work around this by simply using the already
prepared formatting operand code 'D'. The patch also introduces a new
vax.exp fragment (under gcc.target).
Ok?
diff --git a/gcc/config/vax/vax.c b/gcc/config/vax/vax.c
index 53189a7..6b643d1 100644
--- a/gcc/config/vax/vax.c
+++ b/gcc/config/vax/vax.c
@@ -1187,7 +1187,7 @@ vax_output_int_move (rtx insn ATTRIBUTE_UNUSED, rtx
*operands,
{
operands[1] = GEN_INT (lval);
operands[2] = GEN_INT (n);
- return "ashq %2,%1,%0";
+ return "ashq %2,%D1,%0";
}
#if HOST_BITS_PER_WIDE_INT == 32
}
@@ -1199,7 +1199,7 @@ vax_output_int_move (rtx insn ATTRIBUTE_UNUSED, rtx
*operands,
{
operands[1] = GEN_INT (hval >> n);
operands[2] = GEN_INT (n + 32);
- return "ashq %2,%1,%0";
+ return "ashq %2,%D1,%0";
#endif
}
}
diff --git a/gcc/config/vax/vax.md b/gcc/config/vax/vax.md
index eadde18..2c05d00 100644
--- a/gcc/config/vax/vax.md
+++ b/gcc/config/vax/vax.md
@@ -697,14 +697,14 @@
(ashift:DI (match_operand:DI 1 "general_operand" "g")
(match_operand:QI 2 "general_operand" "g")))]
""
- "ashq %2,%1,%0")
+ "ashq %2,%D1,%0")
(define_insn ""
[(set (match_operand:DI 0 "nonimmediate_operand" "=g")
(ashiftrt:DI (match_operand:DI 1 "general_operand" "g")
(neg:QI (match_operand:QI 2 "general_operand" "g"))))]
""
- "ashq %2,%1,%0")
+ "ashq %2,%D1,%0")
;; We used to have expand_shift handle logical right shifts by using extzv,
;; but this make it very difficult to do lshrdi3. Since the VAX is the
diff --git a/gcc/testsuite/gcc.target/vax/pr56875.c
b/gcc/testsuite/gcc.target/vax/pr56875.c
new file mode 100644
index 0000000..f409afe
--- /dev/null
+++ b/gcc/testsuite/gcc.target/vax/pr56875.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O0" } */
+/* { dg-final { scan-assembler "ashq .*,\\\$0xffffffffffffffff," } } */
+/* { dg-final { scan-assembler-not "ashq .*,\\\$-1," } } */
+
+void
+a (void)
+{
+ unsigned long i = 1;
+ unsigned long long v;
+
+ v = ~ (unsigned long long) 0 << i;
+}
diff --git a/gcc/testsuite/gcc.target/vax/vax.exp
b/gcc/testsuite/gcc.target/vax/vax.exp
new file mode 100644
index 0000000..2aec4ee
--- /dev/null
+++ b/gcc/testsuite/gcc.target/vax/vax.exp
@@ -0,0 +1,41 @@
+# Copyright (C) 2013 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3. If not see
+# <http://www.gnu.org/licenses/>.
+
+# GCC testsuite that uses the `dg.exp' driver.
+
+# Exit immediately if this isn't a VAX target.
+if ![istarget vax-*-*] then {
+ return
+}
+
+# Load support procs.
+load_lib gcc-dg.exp
+
+# If a testcase doesn't have special options, use these.
+global DEFAULT_CFLAGS
+if ![info exists DEFAULT_CFLAGS] then {
+ set DEFAULT_CFLAGS " -ansi -pedantic-errors"
+}
+
+# Initialize `dg'.
+dg-init
+
+# Main loop.
+dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.\[cS\]]] \
+ "" $DEFAULT_CFLAGS
+
+# All done.
+dg-finish
MfG, JBG
--
Jan-Benedict Glaw jbg...@lug-owl.de +49-172-7608481
Signature of: Lauf nicht vor Deinem Glück davon:
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