xtensa: backport fix for PR target/90922

Stack pointer adjustment code in prologue missed a case of no
callee-saved registers and a stack frame size bigger than 128 bytes.
Handle that case.

This fixes the following gcc tests with call0 ABI:
  gcc.c-torture/execute/stdarg-2.c
  gcc.dg/torture/pr55882.c
  gcc.dg/torture/pr57569.c

gcc/
2019-09-23  Max Filippov  <jcmvbkbc@gmail.com>

	Backport from mainline
	2019-06-18  Max Filippov  <jcmvbkbc@gmail.com>

	* config/xtensa/xtensa.c (xtensa_expand_prologue): Add stack
	pointer adjustment for the case of no callee-saved registers and
	stack frame bigger than 128 bytes.

From-SVN: r276037

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3a703d26a6bb7f67008b9ac9afdc6e1707b17849..53726d633fe936da0c5aac51564fc20a8ee0cf53 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2019-09-23  Max Filippov  <jcmvbkbc@gmail.com>
+
+       Backport from mainline
+       2019-06-18  Max Filippov  <jcmvbkbc@gmail.com>
+
+       * config/xtensa/xtensa.c (xtensa_expand_prologue): Add stack
+       pointer adjustment for the case of no callee-saved registers and
+       stack frame bigger than 128 bytes.
+
 2019-09-22  Iain Sandoe  <iain@sandoe.co.uk>
 
        Backport from mainline

diff --git a/gcc/config/xtensa/xtensa.c b/gcc/config/xtensa/xtensa.c
index 19bd616d67f60f8f15efa20521998a374b996a22..ee5612441e25d7a48502234ab2188e3abfd2315f 100644 (file)
--- a/gcc/config/xtensa/xtensa.c
+++ b/gcc/config/xtensa/xtensa.c
@@ -2865,7 +2865,8 @@ xtensa_expand_prologue (void)
                            gen_rtx_SET (mem, reg));
            }
        }
-      if (total_size > 1024)
+      if (total_size > 1024
+         || (!callee_save_size && total_size > 128))
        {
          rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG);
          emit_move_insn (tmp_reg, GEN_INT (total_size -