From: Vitaly Buka <vitalybuka@google.com>
Date: Fri, 28 Apr 2023 07:24:34 +0000 (-0700)
Subject: [NFC][HWASAN] Remove unnecessary untag
X-Git-Tag: upstream/17.0.6~10106
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ab1094f0daffb54851aa4597c2216e82fbad37d4;p=platform%2Fupstream%2Fllvm.git

[NFC][HWASAN] Remove unnecessary untag

Looks like HWASAN_ALIASING_MODE work around.
But any tagged pointer should be mapped, so load
should work.
---

diff --git a/compiler-rt/lib/hwasan/hwasan_checks.h b/compiler-rt/lib/hwasan/hwasan_checks.h
index 6e2ab16..616199a 100644
--- a/compiler-rt/lib/hwasan/hwasan_checks.h
+++ b/compiler-rt/lib/hwasan/hwasan_checks.h
@@ -134,9 +134,6 @@ PossiblyShortTagMatches(tag_t mem_tag, uptr ptr, uptr sz) {
     return false;
   if ((ptr & (kShadowAlignment - 1)) + sz > mem_tag)
     return false;
-#if !defined(__aarch64__) && !(SANITIZER_RISCV64)
-  ptr = UntagAddr(ptr);
-#endif
   return *(u8 *)(ptr | (kShadowAlignment - 1)) == ptr_tag;
 }