From: Richard Sandiford <rdsandiford@googlemail.com>
Date: Sun, 23 Dec 2012 10:01:40 +0000 (+0000)
Subject: r10k-cache-barrier-10.c: Make a branch-likely instruction more likely.
X-Git-Tag: releases/gcc-4.8.0~1250
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5f842aa5b66d19ecdbfa00315b48377abb005ba6;p=thirdparty%2Fgcc.git

r10k-cache-barrier-10.c: Make a branch-likely instruction more likely.

gcc/testsuite/
	* gcc.target/mips/r10k-cache-barrier-10.c: Make a branch-likely
	instruction more likely.

From-SVN: r194705
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ed50045e74e8..315fb0e01cce 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2012-12-23  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	* gcc.target/mips/r10k-cache-barrier-10.c: Make a branch-likely
+	instruction more likely.
+
 2012-12-23  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* gcc.target/mips/pr55315.c: Cast to long rather than int.
diff --git a/gcc/testsuite/gcc.target/mips/r10k-cache-barrier-10.c b/gcc/testsuite/gcc.target/mips/r10k-cache-barrier-10.c
index 1b8c6f4ab49c..ad0d2b0491bf 100644
--- a/gcc/testsuite/gcc.target/mips/r10k-cache-barrier-10.c
+++ b/gcc/testsuite/gcc.target/mips/r10k-cache-barrier-10.c
@@ -9,6 +9,12 @@ unsigned char *bar (int);
 NOMIPS16 void
 foo (unsigned char *n)
 {
+  /* n starts in $4, but will be in $2 after the call to bar.
+     Encourage it to be in $2 on entry to the loop as well,
+     by doing some computation on it beforehand (D?ADDIU $2,$4,4).
+     dbr_schedule should then pull the *n load (L[WD] ...,0($2))
+     into the delay slot.  */
+  n += 4;
   do
     n = bar (*n + 1);
   while (n);