From: Andrew Pinski <apinski@cavium.com>
Date: Tue, 2 Oct 2012 21:03:37 +0000 (+0000)
Subject: simplify-rtx.c (simplify_unary_operation_1 <case TRUNCATE>): Don't optimize a truncat... 
X-Git-Tag: misc/gccgo-go1_1_2~458
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fa607ddad04aa72a7b811d366680783237b8cafe;p=thirdparty%2Fgcc.git

simplify-rtx.c (simplify_unary_operation_1 <case TRUNCATE>): Don't optimize a truncate of a mem if it is a vector mode.

2012-10-02  Andrew Pinski  <apinski@cavium.com>

	* simplify-rtx.c (simplify_unary_operation_1 <case TRUNCATE>):
	Don't optimize a truncate of a mem if it is a vector mode.

From-SVN: r192006
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a8ad41cb28da..932f57391466 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-10-02  Andrew Pinski  <apinski@cavium.com>
+
+	* simplify-rtx.c (simplify_unary_operation_1 <case TRUNCATE>):
+	Don't optimize a truncate of a mem if it is a vector mode.
+
 2012-10-02  Alexandre Oliva <aoliva@redhat.com>
 
 	PR debug/54551
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index c3e8a0a7e185..acd479876039 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -873,6 +873,7 @@ simplify_unary_operation_1 (enum rtx_code code, enum machine_mode mode, rtx op)
       /* A truncate of a memory is just loading the low part of the memory
 	 if we are not changing the meaning of the address. */
       if (GET_CODE (op) == MEM
+	  && !VECTOR_MODE_P (mode)
 	  && !MEM_VOLATILE_P (op)
 	  && !mode_dependent_address_p (XEXP (op, 0), MEM_ADDR_SPACE (op)))
 	return rtl_hooks.gen_lowpart_no_emit (mode, op);