From: Joern Rennecke <joern.rennecke@embecosm.com>
Date: Fri, 11 Apr 2014 18:29:30 +0000 (+0000)
Subject: epiphany.c (epiphany_rtx_cost): Compare with CC_N_NE / CC_C_LTU / CC_C_GTU carries... 
X-Git-Tag: releases/gcc-5.1.0~8172
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5d0ecea7981806ffb1277f3087b242104722d36;p=thirdparty%2Fgcc.git

epiphany.c (epiphany_rtx_cost): Compare with CC_N_NE / CC_C_LTU / CC_C_GTU carries no extra cost for its operands.

    gcc:
            * config/epiphany/epiphany.c (epiphany_rtx_cost): Compare
            with CC_N_NE / CC_C_LTU / CC_C_GTU carries no extra cost for
            its operands.
    gcc/testsuite:
            * gcc.target/epiphany/btst-1.c: New test.

From-SVN: r209319
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 32ed05f44522..a9ecf69ac3cb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-04-11  Joern Rennecke  <joern.rennecke@embecosm.com>
+
+	* config/epiphany/epiphany.c (epiphany_rtx_cost): Compare
+	with CC_N_NE / CC_C_LTU / CC_C_GTU carries no extra cost for
+	its operands.
+
 2014-04-11  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	PR rtl-optimization/60651
diff --git a/gcc/config/epiphany/epiphany.c b/gcc/config/epiphany/epiphany.c
index 59b24107a689..8e45ea756d22 100644
--- a/gcc/config/epiphany/epiphany.c
+++ b/gcc/config/epiphany/epiphany.c
@@ -763,6 +763,19 @@ epiphany_rtx_costs (rtx x, int code, int outer_code, int opno ATTRIBUTE_UNUSED,
       *total = COSTS_N_INSNS (1);
       return true;
 
+    case COMPARE:
+      switch (GET_MODE (x))
+	{
+	/* There are a number of single-insn combiner patterns that use
+	   the flag side effects of arithmetic.  */
+	case CC_N_NEmode:
+	case CC_C_LTUmode:
+	case CC_C_GTUmode:
+	  return true;
+	default:
+	  return false;
+	}
+
     default:
       return false;
     }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index e7f800a1cb1a..9c3c3e4bfcd0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2014-04-11  Joern Rennecke  <joern.rennecke@embecosm.com>
+
+	* gcc.target/epiphany/btst-1.c: New test.
+
 2014-04-11  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	PR rtl-optimization/60651
diff --git a/gcc/testsuite/gcc.target/epiphany/btst-1.c b/gcc/testsuite/gcc.target/epiphany/btst-1.c
new file mode 100644
index 000000000000..b5667cce74c9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/epiphany/btst-1.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-common" } */
+/* { dg-final { scan-assembler-not "movt" } } */
+/* { dg-final { scan-assembler-not "and" } } */
+/* { dg-final { scan-assembler "lsl" } } */
+
+int
+tst (int i)
+{
+  return (i & (1<<21)) ? 6 : 9;
+}