[gcc(refs/vendors/redhat/heads/gcc-8-branch)] aarch64: Fix for PR target/94814

[Jakub Jelinek]

https://gcc.gnu.org/g:d5750ceafd6125a67a60d250bcae32adaf775901

commit d5750ceafd6125a67a60d250bcae32adaf775901
Author: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date:   Tue Apr 28 13:25:43 2020 +0100

    aarch64: Fix for PR target/94814
    
    Backport of PR target/94518: Fix memmodel index in aarch64_store_exclusive_pair
    
    2020-04-28  Andre Vieira  <andre.simoesdiasvieira@arm.com>
    
            PR target/94814
            Backport from gcc-9.
            2020-04-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
    
            PR target/94518
            2019-09-23  Richard Sandiford  <richard.sandiford@arm.com>
    
            * config/aarch64/atomics.md (aarch64_store_exclusive_pair): Fix
            memmodel index.

Diff:
---
 gcc/ChangeLog                 | 12 ++++++++++++
 gcc/config/aarch64/atomics.md |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 15291a07cbc..cc41f3685ad 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2020-04-28  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+
+	PR target/94814
+	Backport from gcc-9.
+	2020-04-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	PR target/94518
+	2019-09-23  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* config/aarch64/atomics.md (aarch64_store_exclusive_pair): Fix
+	memmodel index.
+
 2020-04-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>
 
 	Backport from mainline
diff --git a/gcc/config/aarch64/atomics.md b/gcc/config/aarch64/atomics.md
index 1005462ae23..0e0b0373192 100644
--- 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