From: Uros Bizjak <ubizjak@gmail.com>
Date: Thu, 29 Aug 2019 19:47:19 +0000 (+0200)
Subject: * config/i386/i386-features.c
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2a3daf5b6101ff30f4bae3a83cf49e8f1e3d082b;p=gcc.git

* config/i386/i386-features.c
	(general_scalar_chain::compute_convert_gain):
	Correct cost for double-word shifts.
	(general_scalar_to_vector_candidate_p): Reject count operands
	greater or equal to mode bitsize.

From-SVN: r275055
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f73e8be7df2..e09649766e3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2019-08-29  Uroš Bizjak  <ubizjak@gmail.com>
+
+	* config/i386/i386-features.c
+	(general_scalar_chain::compute_convert_gain):
+	Correct cost for double-word shifts.
+	(general_scalar_to_vector_candidate_p): Reject count operands
+	greater or equal to mode bitsize.
+
 2019-08-29  Uroš Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (inline_secondary_memory_needed): Return true
diff --git a/gcc/config/i386/i386-features.c b/gcc/config/i386/i386-features.c
index 03f33f8b0b0..454eeaebef9 100644
--- a/gcc/config/i386/i386-features.c
+++ b/gcc/config/i386/i386-features.c
@@ -549,11 +549,18 @@ general_scalar_chain::compute_convert_gain ()
 	       || GET_CODE (src) == ASHIFTRT
 	       || GET_CODE (src) == LSHIFTRT)
 	{
+	  if (m == 2)
+	    {
+	      if (INTVAL (XEXP (src, 1)) >= 32)
+		igain += ix86_cost->add;
+	      else
+		igain += ix86_cost->shift_const;
+	    }
+
+	  igain += ix86_cost->shift_const - ix86_cost->sse_op;
+
 	  if (CONST_INT_P (XEXP (src, 0)))
 	    igain -= vector_const_cost (XEXP (src, 0));
-	  igain += m * ix86_cost->shift_const - ix86_cost->sse_op;
-	  if (INTVAL (XEXP (src, 1)) >= 32)
-	    igain -= COSTS_N_INSNS (1);
 	}
       else if (GET_CODE (src) == PLUS
 	       || GET_CODE (src) == MINUS
@@ -1359,7 +1366,7 @@ general_scalar_to_vector_candidate_p (rtx_insn *insn, enum machine_mode mode)
     case ASHIFT:
     case LSHIFTRT:
       if (!CONST_INT_P (XEXP (src, 1))
-	  || !IN_RANGE (INTVAL (XEXP (src, 1)), 0, 63))
+	  || !IN_RANGE (INTVAL (XEXP (src, 1)), 0, GET_MODE_BITSIZE (mode)-1))
 	return false;
       break;