Patchwork [Testsuite] Add new effective target arm_prefer_ldrd_strd

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Submitter Greta Yorsh
Date Oct. 10, 2012, 2:28 p.m.
Message ID <000401cda6f3$73946060$5abd2120$@yorsh@arm.com>
Download mbox | patch
Permalink /patch/190654/
State New
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Comments

Greta Yorsh - Oct. 10, 2012, 2:28 p.m.
In the testsuite, distinguish between arm targets that prefer LDRD/STRD and
arm targets that prefer LDM/STM. This patch adds a new effective target test
and updates documentation accordingly.

Ok for trunk?

Thanks,
Greta

ChangeLog

gcc/testsuite/

2012-09-13  Greta Yorsh  <Greta.Yorsh@arm.com>

        * gcc.target/arm/target-supports.exp
(check_effective_target_arm_prefer_ldrd_strd): New procedure.

gcc/

2012-09-13  Greta Yorsh  <Greta.Yorsh@arm.com>

        * doc/sourcebuild.texi: Document new effective target keyword
        arm_prefer_ldrd_strd.

Patch

diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
index 055567b..b80ee02 100644
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -1552,6 +1552,11 @@  ARM target generates Thumb-2 code for @code{-mthumb}.
 @item arm_vfp_ok
 ARM target supports @code{-mfpu=vfp -mfloat-abi=softfp}.
 Some multilibs may be incompatible with these options.
+
+@item arm_prefer_ldrd_strd
+ARM target prefers @code{LDRD} and @code{STRD} instructions over
+@code{LDM} and @code{STM} instructions.
+
 @end table
 
 @subsubsection MIPS-specific attributes
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 8f793b7..4bf2424 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -2462,6 +2462,18 @@  proc check_effective_target_arm_iwmmxt_ok { } {
     }
 }
 
+# Return true if LDRD/STRD instructions are prefered over LDM/STM instructions
+# for an ARM target.
+proc check_effective_target_arm_prefer_ldrd_strd { } {
+    if { ![check_effective_target_arm32] } {
+      return 0;
+    }
+
+    return [check_no_messages_and_pattern arm_prefer_ldrd_strd "strd\tr" assembly {
+        void foo (int *p) { p[0] = 1; p[1] = 0;}
+    }  "-O2 -mthumb" ]
+}
+
 # Return 1 if this is a PowerPC target with floating-point registers.
 
 proc check_effective_target_powerpc_fprs { } {