From: Aaron Sawdey <acsawdey@linux.vnet.ibm.com>
Date: Tue, 13 Mar 2018 16:28:09 +0000 (+0000)
Subject: re PR target/84743 (default widths for parallel reassociation now hurt rather than... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b34f5c5e69bb024f41b4e15869f7ff18c3f8dd6f;p=gcc.git

re PR target/84743 (default widths for parallel reassociation now hurt rather than help)

2018-03-13  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>

	PR target/84743
	* config/rs6000/rs6000.c (rs6000_reassociation_width): Disable parallel
	reassociation for int modes.

From-SVN: r258495
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4a6f4d47b60..6453b26584b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-03-13  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>
+
+	PR target/84743
+	* config/rs6000/rs6000.c (rs6000_reassociation_width): Disable parallel
+	reassociation for int modes.
+
 2018-03-13  Richard Sandiford  <richard.sandiford@linaro.org>
 
 	* tree-vect-loop-manip.c (vect_maybe_permute_loop_masks):
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 1db88d0a1d2..7e3e5a637f5 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -10004,7 +10004,7 @@ rs6000_reassociation_width (unsigned int opc ATTRIBUTE_UNUSED,
       if (VECTOR_MODE_P (mode))
 	return 4;
       if (INTEGRAL_MODE_P (mode)) 
-	return opc == MULT_EXPR ? 4 : 6;
+	return 1;
       if (FLOAT_MODE_P (mode))
 	return 4;
       break;