gcc/gcc9-pr88905.patch

2019-01-21  Jakub Jelinek  <jakub@redhat.com>

	PR target/88905
	* optabs.c (add_equal_note): Add op0_mode argument, use it instead of
	GET_MODE (op0).
	(expand_binop_directly, expand_doubleword_clz,
	expand_doubleword_popcount, expand_ctz, expand_ffs,
	expand_unop_direct, maybe_emit_unop_insn): Adjust callers.

	* gcc.dg/pr88905.c: New test.

--- gcc/optabs.c.jj	2019-01-01 12:37:17.711965861 +0100
+++ gcc/optabs.c	2019-01-21 13:56:18.263446049 +0100
@@ -55,7 +55,7 @@ void debug_optab_libfuncs (void);
 
 /* Add a REG_EQUAL note to the last insn in INSNS.  TARGET is being set to
    the result of operation CODE applied to OP0 (and OP1 if it is a binary
-   operation).
+   operation).  OP0_MODE is OP0's mode.
 
    If the last insn does not set TARGET, don't do anything, but return 1.
 
@@ -64,7 +64,8 @@ void debug_optab_libfuncs (void);
    try again, ensuring that TARGET is not one of the operands.  */
 
 static int
-add_equal_note (rtx_insn *insns, rtx target, enum rtx_code code, rtx op0, rtx op1)
+add_equal_note (rtx_insn *insns, rtx target, enum rtx_code code, rtx op0,
+		rtx op1, machine_mode op0_mode)
 {
   rtx_insn *last_insn;
   rtx set;
@@ -136,16 +137,16 @@ add_equal_note (rtx_insn *insns, rtx tar
       case POPCOUNT:
       case PARITY:
       case BSWAP:
-	if (GET_MODE (op0) != VOIDmode && GET_MODE (target) != GET_MODE (op0))
+	if (op0_mode != VOIDmode && GET_MODE (target) != op0_mode)
 	  {
-	    note = gen_rtx_fmt_e (code, GET_MODE (op0), copy_rtx (op0));
-	    if (GET_MODE_UNIT_SIZE (GET_MODE (op0))
+	    note = gen_rtx_fmt_e (code, op0_mode, copy_rtx (op0));
+	    if (GET_MODE_UNIT_SIZE (op0_mode)
 		> GET_MODE_UNIT_SIZE (GET_MODE (target)))
 	      note = simplify_gen_unary (TRUNCATE, GET_MODE (target),
-					 note, GET_MODE (op0));
+					 note, op0_mode);
 	    else
 	      note = simplify_gen_unary (ZERO_EXTEND, GET_MODE (target),
-					 note, GET_MODE (op0));
+					 note, op0_mode);
 	    break;
 	  }
 	/* FALLTHRU */
@@ -1127,7 +1128,7 @@ expand_binop_directly (enum insn_code ic
       if (INSN_P (pat) && NEXT_INSN (pat) != NULL_RTX
 	  && ! add_equal_note (pat, ops[0].value,
 			       optab_to_code (binoptab),
-			       ops[1].value, ops[2].value))
+			       ops[1].value, ops[2].value, mode0))
 	{
 	  delete_insns_since (last);
 	  return expand_binop (mode, binoptab, op0, op1, NULL_RTX,
@@ -2298,7 +2299,7 @@ expand_doubleword_clz (scalar_int_mode m
   seq = get_insns ();
   end_sequence ();
 
-  add_equal_note (seq, target, CLZ, xop0, 0);
+  add_equal_note (seq, target, CLZ, xop0, NULL_RTX, mode);
   emit_insn (seq);
   return target;
 
@@ -2340,7 +2341,7 @@ expand_doubleword_popcount (scalar_int_m
   seq = get_insns ();
   end_sequence ();
 
-  add_equal_note (seq, t, POPCOUNT, op0, 0);
+  add_equal_note (seq, t, POPCOUNT, op0, NULL_RTX, mode);
   emit_insn (seq);
   return t;
 }
@@ -2511,7 +2512,7 @@ expand_ctz (scalar_int_mode mode, rtx op
   seq = get_insns ();
   end_sequence ();
 
-  add_equal_note (seq, temp, CTZ, op0, 0);
+  add_equal_note (seq, temp, CTZ, op0, NULL_RTX, mode);
   emit_insn (seq);
   return temp;
 }
@@ -2589,7 +2590,7 @@ expand_ffs (scalar_int_mode mode, rtx op
   seq = get_insns ();
   end_sequence ();
 
-  add_equal_note (seq, temp, FFS, op0, 0);
+  add_equal_note (seq, temp, FFS, op0, NULL_RTX, mode);
   emit_insn (seq);
   return temp;
 
@@ -2736,7 +2737,7 @@ expand_unop_direct (machine_mode mode, o
 	  if (INSN_P (pat) && NEXT_INSN (pat) != NULL_RTX
 	      && ! add_equal_note (pat, ops[0].value,
 				   optab_to_code (unoptab),
-				   ops[1].value, NULL_RTX))
+				   ops[1].value, NULL_RTX, mode))
 	    {
 	      delete_insns_since (last);
 	      return expand_unop (mode, unoptab, op0, NULL_RTX, unsignedp);
@@ -3588,7 +3589,8 @@ maybe_emit_unop_insn (enum insn_code ico
 
   if (INSN_P (pat) && NEXT_INSN (pat) != NULL_RTX
       && code != UNKNOWN)
-    add_equal_note (pat, ops[0].value, code, ops[1].value, NULL_RTX);
+    add_equal_note (pat, ops[0].value, code, ops[1].value, NULL_RTX,
+		    GET_MODE (op0));
 
   emit_insn (pat);
 
--- gcc/testsuite/gcc.dg/pr88905.c.jj	2019-01-21 14:19:17.279746531 +0100
+++ gcc/testsuite/gcc.dg/pr88905.c	2019-01-21 14:18:56.264091537 +0100
@@ -0,0 +1,21 @@
+/* PR target/88905 */
+/* { dg-do compile } */
+/* { dg-options "-Og -fno-tree-ccp" } */
+/* { dg-additional-options "-mabm" { target { i?86-*-* x86_64-*-* } } } */
+
+int a, b, c;
+extern void baz (int);
+
+static inline int
+bar (unsigned u)
+{
+  int i = __builtin_popcountll (-(unsigned long long) u);
+  baz (i & c);
+  return a + b + c;
+}
+
+void
+foo (void)
+{
+  bar (2376498292ULL);
+}