Re: [PATCH] Fix PR81422[aarch64] internal compiler error: in update_equiv_regs, at ira.c:3425

[Qing Zhao]

HI, Richard,

> On Oct 5, 2017, at 9:53 AM, Richard Earnshaw (lists) 
> <richard.earns...@arm.com> wrote:
> 
> Two minor nits to fix:
> 
> - ChangeLog entries should start with a capital letter (s/check/Check/).
> - Please use hard tabs rather than 8 consecutive spaces (each of your
> new 'if' statements).
> 
> OK with those changes.
> 
> R.

Per your comments, my updated patch is following:

since I don’t have the SVN write permission, if the change is good, could you 
help me to check them in?

thanks a lot.

Qing

===============

gcc/ChangeLog:

      * config/aarch64/aarch64.c (aarch64_load_symref_appropriately):
      Check whether the dest is REG before adding REG_EQUIV note.

gcc/testsuite/ChangeLog:

      PR target/81422
      * gcc.target/aarch64/pr81422.C: New test.

---
 gcc/config/aarch64/aarch64.c               | 12 ++++++++----
 gcc/testsuite/gcc.target/aarch64/pr81422.C | 15 +++++++++++++++
 2 files changed, 23 insertions(+), 4 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/aarch64/pr81422.C

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index ee98a1f..181f66a 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -1490,7 +1490,8 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm,
          tp = gen_lowpart (mode, tp);
 
        emit_insn (gen_rtx_SET (dest, gen_rtx_PLUS (mode, tp, x0)));
-       set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
+       if (REG_P (dest))
+         set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
        return;
       }
 
@@ -1524,7 +1525,8 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm,
          }
 
        emit_insn (gen_rtx_SET (dest, gen_rtx_PLUS (mode, tp, tmp_reg)));
-       set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
+       if (REG_P (dest))
+         set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
        return;
       }
 
@@ -1565,7 +1567,8 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm,
            gcc_unreachable ();
          }
 
-       set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
+       if (REG_P (dest))
+         set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
        return;
       }
 
@@ -1594,7 +1597,8 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm,
            emit_insn (gen_tlsie_tiny_sidi (dest, imm, tp));
          }
 
-       set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
+       if (REG_P (dest))
+         set_unique_reg_note (get_last_insn (), REG_EQUIV, imm);
        return;
       }
 
diff --git a/gcc/testsuite/gcc.target/aarch64/pr81422.C 
b/gcc/testsuite/gcc.target/aarch64/pr81422.C
new file mode 100644
index 0000000..5bcc948
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/pr81422.C
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O0" } */
+
+struct DArray
+{
+    __SIZE_TYPE__ length;
+    int* ptr;
+};
+
+void foo35(DArray)
+{
+    static __thread int x[5];
+    foo35({5, (int*)&x});
+}
+
-- 
1.9.1