[Patch AArch64] Add early clobber for aarch64_store_exclusive.

From-SVN: r262686

[Patch AArch64] Add early clobber for aarch64_store_exclusive.
From-SVN: r262686
1d896f48 · Ramana Radhakrishnan · Ramana Radhakrishnan · 5e5ef52c · 1d896f48 · 1d896f48
Commit 1d896f48 authored Jul 16, 2018 by Ramana Radhakrishnan Committed by Ramana Radhakrishnan Jul 16, 2018
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gcc/ChangeLog
+5 -0

gcc/config/aarch64/atomics.md
+1 -1

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2018-07-16  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	* config/aarch64/atomics.md (aarch64_store_execlusive<mode>): Add
+	early clobber.
+
 2018-07-16  Eric Botcazou  <ebotcazou@adacore.com>

 	PR tree-optimization/86514

--- a/gcc/config/aarch64/atomics.md
+++ b/gcc/config/aarch64/atomics.md
@@ -530,7 +530,7 @@
 )

 (define_insn "aarch64_store_exclusive<mode>"
-  [(set (match_operand:SI 0 "register_operand" "=r")
+  [(set (match_operand:SI 0 "register_operand" "=&r")
    (unspec_volatile:SI [(const_int 0)] UNSPECV_SX))
   (set (match_operand:ALLI 1 "aarch64_sync_memory_operand" "=Q")
    (unspec_volatile:ALLI