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[PATCH AArch64]: Add constraint letter for stack_protect_test pattern.
- From: Venkataramanan Kumar <venkataramanan dot kumar at linaro dot org>
- To: Marcus Shawcroft <marcus dot shawcroft at arm dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Patch Tracking <patch at linaro dot org>, Richard Earnshaw <rearnsha at arm dot com>
- Date: Thu, 4 Sep 2014 12:42:58 +0530
- Subject: [PATCH AArch64]: Add constraint letter for stack_protect_test pattern.
- Authentication-results: sourceware.org; auth=none
Hi Maintainers,
Below patch adds register constraint "r" for destination operand in
"stack_protect_test" pattern.
We need a general register here and adding "r" will avoid vector
register getting allocated.
regression tested on aarch64-unknown-linux-gnu.
Ok for trunk?
regards,
Venkat.
gcc/ChangeLog
2014-09-04 Venkataramanan Kumar <venkataramanan.kumar@linaro.org>
* config/aarch64/aarch64.md (stack_protect_test_<mode>) Add register
constraint for operand 0.
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index b5be79c..77588b9 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -4026,7 +4026,7 @@
})
(define_insn "stack_protect_test_<mode>"
- [(set (match_operand:PTR 0 "register_operand")
+ [(set (match_operand:PTR 0 "register_operand" "r")
(unspec:PTR [(match_operand:PTR 1 "memory_operand" "m")
(match_operand:PTR 2 "memory_operand" "m")]
UNSPEC_SP_TEST))