coarray_data_1.f90: Link against libatomic if target libatomic_available.

[gcc.git] / gcc / combine-stack-adj.c

diff --git a/gcc/combine-stack-adj.c b/gcc/combine-stack-adj.c
index 82d6dba856fe374d3cb2e1b68f238217a507fabb..3638a1b10ee4c81d2cba803355bbb588eb37405f 100644 (file)
--- a/gcc/combine-stack-adj.c
+++ b/gcc/combine-stack-adj.c
@@ -1,5 +1,5 @@
 /* Combine stack adjustments.
-   Copyright (C) 1987-2017 Free Software Foundation, Inc.
+   Copyright (C) 1987-2019 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -133,6 +133,7 @@ single_set_for_csa (rtx_insn *insn)
          && SET_SRC (this_rtx) == SET_DEST (this_rtx))
        ;
       else if (GET_CODE (this_rtx) != CLOBBER
+              && GET_CODE (this_rtx) != CLOBBER_HIGH
               && GET_CODE (this_rtx) != USE)
        return NULL_RTX;
     }
@@ -539,7 +540,7 @@ combine_stack_adjustments_for_block (basic_block bb)
                 Also we need to be careful to not move stack pointer
                 such that we create stack accesses outside the allocated
                 area.  We can combine an allocation into the first insn,
-                or a deallocation into the second insn.  We can not
+                or a deallocation into the second insn.  We cannot
                 combine an allocation followed by a deallocation.
 
                 The only somewhat frequent occurrence of the later is when
@@ -622,11 +623,11 @@ combine_stack_adjustments_for_block (basic_block bb)
          if (MEM_P (dest)
              && ((STACK_GROWS_DOWNWARD
                   ? (GET_CODE (XEXP (dest, 0)) == PRE_DEC
-                     && last_sp_adjust
-                        == (HOST_WIDE_INT) GET_MODE_SIZE (GET_MODE (dest)))
+                     && known_eq (last_sp_adjust,
+                                  GET_MODE_SIZE (GET_MODE (dest))))
                   : (GET_CODE (XEXP (dest, 0)) == PRE_INC
-                     && last_sp_adjust
-                        == -(HOST_WIDE_INT) GET_MODE_SIZE (GET_MODE (dest))))
+                     && known_eq (-last_sp_adjust,
+                                  GET_MODE_SIZE (GET_MODE (dest)))))
                  || ((STACK_GROWS_DOWNWARD
                       ? last_sp_adjust >= 0 : last_sp_adjust <= 0)
                      && GET_CODE (XEXP (dest, 0)) == PRE_MODIFY