re PR target/83554 (ICE: in ix86_mitigate_rop, at config/i386/i386.c:41274 with -mmitigate-rop)

	PR target/83554
	* config/i386/i386.md (*<rotate_insn>hi3_1 splitter): Use
	QIreg_operand instead of register_operand predicate.
	* config/i386/i386.c (ix86_rop_should_change_byte_p,
	set_rop_modrm_reg_bits, ix86_mitigate_rop): Use -mmitigate-rop in
	comments instead of -fmitigate[-_]rop.

	* gcc.target/i386/pr83554.c: New test.

Co-Authored-By: Uros Bizjak <ubizjak@gmail.com>

From-SVN: r256268

gcc/ChangeLog

+2018-01-04  Jakub Jelinek  <jakub@redhat.com>
+	    Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/83554
+	* config/i386/i386.md (*<rotate_insn>hi3_1 splitter): Use
+	QIreg_operand instead of register_operand predicate.
+	* config/i386/i386.c (ix86_rop_should_change_byte_p,
+	set_rop_modrm_reg_bits, ix86_mitigate_rop): Use -mmitigate-rop in
+	comments instead of -fmitigate[-_]rop.
+
 2018-01-04  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	PR bootstrap/81926

gcc/config/i386/i386.c

@@ -3089,7 +3089,7 @@ ix86_debug_options (void)
 }
 
 /* Return true if T is one of the bytes we should avoid with
-   -fmitigate-rop.  */
+   -mmitigate-rop.  */
 
 static bool
 ix86_rop_should_change_byte_p (int t)
@@ -41175,7 +41175,7 @@ ix86_seh_fixup_eh_fallthru (void)
 /* Given a register number BASE, the lowest of a group of registers, update
    regsets IN and OUT with the registers that should be avoided in input
    and output operands respectively when trying to avoid generating a modr/m
-   byte for -fmitigate-rop.  */
+   byte for -mmitigate-rop.  */
 
 static void
 set_rop_modrm_reg_bits (int base, HARD_REG_SET &in, HARD_REG_SET &out)
@@ -41186,7 +41186,7 @@ set_rop_modrm_reg_bits (int base, HARD_REG_SET &in, HARD_REG_SET &out)
   SET_HARD_REG_BIT (in, base + 3);
 }
 
-/* Called if -fmitigate_rop is in effect.  Try to rewrite instructions so
+/* Called if -mmitigate-rop is in effect.  Try to rewrite instructions so
    that certain encodings of modr/m bytes do not occur.  */
 static void
 ix86_mitigate_rop (void)

gcc/config/i386/i386.md

@@ -11643,7 +11643,7 @@
    (set_attr "mode" "QI")])
 
 (define_split
- [(set (match_operand:HI 0 "register_operand")
+ [(set (match_operand:HI 0 "QIreg_operand")
        (any_rotate:HI (match_dup 0) (const_int 8)))
   (clobber (reg:CC FLAGS_REG))]
  "reload_completed

gcc/testsuite/ChangeLog

 2018-01-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/83554
+	* gcc.target/i386/pr83554.c: New test.
+
 	PR ipa/82352
 	* g++.dg/ipa/pr82352.C (size_t): Define to __SIZE_TYPE__ instead of
 	long unsigned int.

gcc/testsuite/gcc.target/i386/pr83554.c

+/* PR target/83554 */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-Os -mmitigate-rop" } */
+
+unsigned a;
+unsigned __int128
+foo (unsigned char c, unsigned short d, unsigned e, unsigned long f,
+     unsigned __int128 g, unsigned h, unsigned short i, unsigned long j)
+{
+  j /= (unsigned)-2;
+  h += h &= c == c;
+  h -= g;
+  i = i >> 8 | i << 8;
+  return c + d + e + f + g + h + i + j + a;
+}