[gcc(refs/users/xry111/heads/mips-n32-asan)] Mips: Fix the ASAN shadow offset hook for the n32 ABI

[Xi Ruoyao <xry111@gcc.gnu.org>]

https://gcc.gnu.org/g:ad6e4e9af4bb22400b46fb9a886299c0f3a9c5fb

commit ad6e4e9af4bb22400b46fb9a886299c0f3a9c5fb
Author: Dimitrije Milosevic <Dimitrije.Milosevic@Syrmia.com>
Date:   Thu Jul 7 01:58:20 2022 +0800

    Mips: Fix the ASAN shadow offset hook for the n32 ABI
    
    gcc/ChangeLog:
    
            * config/mips/mips.cc (mips_asan_shadow_offset): Reformat
            to handle the N32 ABI.
            * config/mips/mips.h (SUBTARGET_SHADOW_OFFSET): Remove
            the macro, as it is not needed anymore.

Diff:
---
 gcc/config/mips/mips.cc | 7 ++++++-
 gcc/config/mips/mips.h  | 7 -------
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/gcc/config/mips/mips.cc b/gcc/config/mips/mips.cc
index 5eb845960e1..e81a245dcf4 100644
--- a/gcc/config/mips/mips.cc
+++ b/gcc/config/mips/mips.cc
@@ -22743,7 +22743,12 @@ mips_constant_alignment (const_tree exp, HOST_WIDE_INT align)
 static unsigned HOST_WIDE_INT
 mips_asan_shadow_offset (void)
 {
-  return SUBTARGET_SHADOW_OFFSET;
+  if (mips_abi == ABI_N32)
+    return (HOST_WIDE_INT_1 << 29);
+  if (POINTER_SIZE == 64)
+    return (HOST_WIDE_INT_1 << 37);
+  else
+    return HOST_WIDE_INT_C (0x0aaa0000);
 }
 
 /* Implement TARGET_STARTING_FRAME_OFFSET.  See mips_compute_frame_info
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 858bbba3a36..0029864fdcd 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -3463,10 +3463,3 @@ struct GTY(())  machine_function {
    && !TARGET_MICROMIPS && !TARGET_FIX_24K)
 
 #define NEED_INDICATE_EXEC_STACK 0
-
-/* Define the shadow offset for asan. Other OS's can override in the
-   respective tm.h files.  */
-#ifndef SUBTARGET_SHADOW_OFFSET
-#define SUBTARGET_SHADOW_OFFSET \
-  (POINTER_SIZE == 64 ? HOST_WIDE_INT_1 << 37 : HOST_WIDE_INT_C (0x0aaa0000))
-#endif