[AArch64] Fix memmodel index in aarch64_store_exclusive_pair

Found via an rtx checking failure.

2019-09-23  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/atomics.md (aarch64_store_exclusive_pair): Fix
	memmodel index.

From-SVN: r276052

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index de8f50e..79b331a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2019-09-23  Richard Sandiford  <richard.sandiford@arm.com>
+
+       * config/aarch64/atomics.md (aarch64_store_exclusive_pair): Fix
+       memmodel index.
+
 2019-09-23  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
        PR ipa/91835

diff --git a/gcc/config/aarch64/atomics.md b/gcc/config/aarch64/atomics.md
index 2e59b86..4111721 100644 (file)
--- a/gcc/config/aarch64/atomics.md
+++ b/gcc/config/aarch64/atomics.md
@@ -752,7 +752,7 @@
          UNSPECV_SX))]
   ""
   {
-    enum memmodel model = memmodel_from_int (INTVAL (operands[3]));
+    enum memmodel model = memmodel_from_int (INTVAL (operands[4]));
     if (is_mm_relaxed (model) || is_mm_consume (model) || is_mm_acquire (model))
       return "stxp\t%w0, %x2, %x3, %1";
     else