meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0031-Fixing-the-issue-with-MicroBlaze-builtin_alloc.patch

From fdb99f97b41f7cd06b81e668b88463d0fc2cbe87 Mon Sep 17 00:00:00 2001
From: Nagaraju Mekala <nagaraju.mekala@xilinx.com>
Date: Sat, 26 Aug 2017 19:21:54 -0700
Subject: [PATCH] Fixing the issue with MicroBlaze builtin_alloc

Fixing the issue with the builtin_alloc. Register r18 was not properly
handling the stack pattern which was resolved by using free available
register

Signed-off-by: Nagaraju Mekala <nagaraju.mekala@xilinx.com>
Signed-off-by: Manjukumar Matha <manjukumar.harthikote-matha@xilinx.com>
Upstream-Status: Pending
---
 gcc/config/microblaze/microblaze.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/gcc/config/microblaze/microblaze.md b/gcc/config/microblaze/microblaze.md
index 7a00629922..68c3b22bd4 100644
--- a/gcc/config/microblaze/microblaze.md
+++ b/gcc/config/microblaze/microblaze.md
@@ -2076,10 +2076,10 @@
   ""
   { 
     rtx retaddr = gen_rtx_MEM (Pmode, stack_pointer_rtx);
-    rtx rtmp    = gen_rtx_REG (SImode, R_TMP);
+    rtx reg = gen_reg_rtx (Pmode);
     rtx neg_op0;
 
-    emit_move_insn (rtmp, retaddr);
+    emit_move_insn (reg, retaddr);
     if (GET_CODE (operands[1]) != CONST_INT)
     {
         neg_op0 = gen_reg_rtx (Pmode);
@@ -2088,9 +2088,9 @@
         neg_op0 = GEN_INT (- INTVAL (operands[1]));
 
     emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, neg_op0));
-    emit_move_insn (gen_rtx_MEM (Pmode, stack_pointer_rtx), rtmp);
+    emit_move_insn (gen_rtx_MEM (Pmode, stack_pointer_rtx), reg);
     emit_move_insn (operands[0], virtual_stack_dynamic_rtx);
-    emit_insn (gen_rtx_CLOBBER (SImode, rtmp));
+    emit_insn (gen_rtx_CLOBBER (SImode, reg));
     DONE;
   }
 )
-- 
2.14.2