re PR target/93110 (grub-2.04/grub-core/lib/division.c:28:1: internal compiler error...

	PR target/93110
	* config/i386/i386.md (abs<mode>2): Use expand_simple_binop instead of
	emitting ASHIFTRT, XOR and MINUS by hand.  Use gen_int_mode with QImode
	instead of gen_int_shift_amount + convert_modes.

	* gcc.dg/torture/pr93110.c: New test.

From-SVN: r279855

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ce5cb00..9728bf6 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2020-01-03  Jakub Jelinek  <jakub@redhat.com>
 
+       PR target/93110
+       * config/i386/i386.md (abs<mode>2): Use expand_simple_binop instead of
+       emitting ASHIFTRT, XOR and MINUS by hand.  Use gen_int_mode with QImode
+       instead of gen_int_shift_amount + convert_modes.
+
        PR rtl-optimization/93088
        * loop-iv.c (find_single_def_src): Punt after looking through
        128 reg copies for regs with single definitions.  Move definitions

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 4d55643..01c7d65 100644 (file)
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -9711,30 +9711,16 @@
 
     /* Generate rtx abs using abs (x) = (((signed) x >> (W-1)) ^ x) -
        ((signed) x >> (W-1)) */
-    rtx shift_amount = gen_int_shift_amount (mode,
-                                      GET_MODE_PRECISION (mode)
-                                      - 1);
-    shift_amount = convert_modes (E_QImode, GET_MODE (shift_amount),
-                           shift_amount, 1);
-    rtx shift_dst = gen_reg_rtx (mode);
-    rtx shift_op = gen_rtx_SET (shift_dst,
-                         gen_rtx_fmt_ee (ASHIFTRT, mode,
-                                         operands[1], shift_amount));
-    rtx clobber = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (CCmode,
-                                                   FLAGS_REG));
-    emit_insn (gen_rtx_PARALLEL (VOIDmode, gen_rtvec (2, shift_op,
-                                               clobber)));
-
-    rtx xor_op = gen_rtx_SET (operands[0],
-                       gen_rtx_fmt_ee (XOR, mode, shift_dst,
-                                       operands[1]));
-    emit_insn (gen_rtx_PARALLEL (VOIDmode, gen_rtvec (2, xor_op, clobber)));
-
-    rtx minus_op = gen_rtx_SET (operands[0],
-                         gen_rtx_fmt_ee (MINUS, mode,
-                                         operands[0], shift_dst));
-    emit_insn (gen_rtx_PARALLEL (VOIDmode, gen_rtvec (2, minus_op,
-                                               clobber)));
+    rtx shift_amount = gen_int_mode (GET_MODE_PRECISION (mode) - 1, QImode);
+    rtx shift_dst = expand_simple_binop (mode, ASHIFTRT, operands[1],
+                                        shift_amount, NULL_RTX,
+                                        0, OPTAB_DIRECT);
+    rtx xor_dst = expand_simple_binop (mode, XOR, shift_dst, operands[1],
+                                      operands[0], 0, OPTAB_DIRECT);
+    rtx minus_dst = expand_simple_binop (mode, MINUS, xor_dst, shift_dst,
+                                        operands[0], 0, OPTAB_DIRECT);
+    if (!rtx_equal_p (minus_dst, operands[0]))
+      emit_move_insn (operands[0], minus_dst);
     DONE;
   })
 

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7be1d90..2cad411 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2020-01-03  Jakub Jelinek  <jakub@redhat.com>
 
+       PR target/93110
+       * gcc.dg/torture/pr93110.c: New test.
+
        PR rtl-optimization/93088
        * gcc.target/i386/pr93088.c: New test.
 

diff --git a/gcc/testsuite/gcc.dg/torture/pr93110.c b/gcc/testsuite/gcc.dg/torture/pr93110.c
new file mode 100644 (file)
index 0000000..c123f5f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr93110.c
@@ -0,0 +1,9 @@
+/* PR target/93110 */
+/* { dg-do compile } */
+/* { dg-additional-options "-mtune=core2 -mno-stv" { target { i?86-*-* x86_64-*-* } } } */
+
+long long
+foo (long long a)
+{
+  return a > 0 ? a : -a;
+}