Revert "[ESan][MIPS] Adds support for MIPS64"

Summary:
This reverts commit 62b3eecdbe72af0255f0639b0446087a47efbf48. (D23799)

The CL cause 13 ESan test failure on x86_64:
Failing Tests (13):
    EfficiencySanitizer-x86_64 :: TestCases/large-stack-linux.c
    EfficiencySanitizer-x86_64 :: TestCases/libc-intercept.c
    EfficiencySanitizer-x86_64 :: TestCases/mmap-shadow-conflict.c
    EfficiencySanitizer-x86_64 :: TestCases/struct-simple.cpp
    EfficiencySanitizer-x86_64 :: TestCases/verbose-simple.c
    EfficiencySanitizer-x86_64 :: TestCases/workingset-early-fault.c
    EfficiencySanitizer-x86_64 :: TestCases/workingset-memset.cpp
    EfficiencySanitizer-x86_64 :: TestCases/workingset-midreport.cpp
    EfficiencySanitizer-x86_64 :: TestCases/workingset-samples.cpp
    EfficiencySanitizer-x86_64 :: TestCases/workingset-signal-posix.cpp
    EfficiencySanitizer-x86_64 :: TestCases/workingset-simple.cpp
    EfficiencySanitizer-x86_64 :: Unit/circular_buffer.cpp
    EfficiencySanitizer-x86_64 :: Unit/hashtable.cpp

  Unexpected Failures: 13

Reviewers: bruening, slthakur

Subscribers: sdardis, kubabrecka, beanz

Differential Revision: https://reviews.llvm.org/D24350

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@280954 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 8 deletions

diff --git a/lib/esan/esan.cpp b/lib/esan/esan.cpp
index 09b530b66..2fb77894d 100644
--- a/lib/esan/esan.cpp
+++ b/lib/esan/esan.cpp
@@ -141,17 +141,9 @@ static bool verifyShadowScheme() {
 }
 #endif
 
-uptr VmaSize;
-
 static void initializeShadow() {
   verifyAddressSpace();
 
-  // This is based on the assumption that the intial stack is always allocated
-  // in the topmost segment of the user address space and the assumption
-  // holds true on all the platforms currently supported.
-  VmaSize =
-    (MostSignificantSetBitIndex(GET_CURRENT_FRAME()) + 1);
-
   DCHECK(verifyShadowScheme());
 
   Mapping.initialize(ShadowScale[__esan_which_tool]);