re PR target/78262 (wrong code with -fschedule-insns)

	PR target/78262
	* config/i386/i386.md (*<shift_insn><mode>3_doubleword): Mark
	operand 0 as earlyclobber.

testsuite/ChangeLog:

	PR target/78262
	* gcc.target/i386/pr78262.c: New test.

From-SVN: r242013

gcc/ChangeLog

+2016-11-09  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/78262
+	* config/i386/i386.md (*<shift_insn><mode>3_doubleword): Mark
+	operand 0 as earlyclobber.
+
 2016-11-09  Martin Liska  <mliska@suse.cz>
 
 	* fold-const-call.c (fold_const_call): Fix up type of s0 and s1.
@@ -107,7 +113,7 @@
 	* sanitizer.def (__asan_version_mismatch_check_v6): Replace with
 	__asan_version_mismatch_check_v8.
 
- 2016-11-08  David Edelsohn  <dje.gcc@gmail.com>
+2016-11-08  David Edelsohn  <dje.gcc@gmail.com>
 
 	* dwarf2asm.c (USE_LINKONCE_INDIRECT): Test XCOFF_DEBUGGING_INFO
 	at runtime.

gcc/config/i386/i386.md

@@ -10339,7 +10339,7 @@
   "operands[2] = gen_lowpart (QImode, operands[2]);")
 
 (define_insn_and_split "*<shift_insn><mode>3_doubleword"
-  [(set (match_operand:DWI 0 "register_operand" "=r")
+  [(set (match_operand:DWI 0 "register_operand" "=&r")
 	(any_shiftrt:DWI (match_operand:DWI 1 "register_operand" "0")
 			 (match_operand:QI 2 "nonmemory_operand" "<S>c")))
    (clobber (reg:CC FLAGS_REG))]

gcc/testsuite/ChangeLog

+2016-11-09  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/78262
+	* gcc.target/i386/pr78262.c: New test.
+
 2016-11-09  Fritz O. Reese <fritzoreese@gmail.com>
 
 	PR fortran/78259

gcc/testsuite/gcc.target/i386/pr78262.c

+/* { dg-do run } */
+/* { dg-require-effective-target int128 } */
+/* { dg-options "-O -fschedule-insns" } */
+
+typedef unsigned char u8;
+typedef unsigned __int128 u128;
+
+static u128 u128_0;
+static u128 *p128;
+
+u128 __attribute__ ((noinline, noclone))
+foo(u8 u8_0)
+{
+  p128 = &u128_0;
+  u128_0 = u8_0;
+  u128_0 = u128_0 << 127 | u128_0 >> 1;
+  u128_0 >>= (u8)u128_0;
+  return 2 + u128_0;
+}
+
+int
+main()
+{
+  u128 x = foo(5);
+  if (p128 != &u128_0)
+    __builtin_abort();
+  if (u128_0 != ((u128)2 << 124))
+    __builtin_abort();
+  if (x != ((u128)2 << 124) + 2)
+    __builtin_abort();
+  return 0;
+}