[llvm] [compiler-rt] [test][msan] s390x already passes the test (PR #72710)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka updated https://github.com/llvm/llvm-project/pull/72710

>From d825bb6e8803fc31a0e863b21e0aa6368e5bd0eb Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka at google.com>
Date: Fri, 17 Nov 2023 14:14:23 -0800
Subject: [PATCH 1/2] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20in?=
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Created using spr 1.3.4
---
 compiler-rt/test/msan/vararg_shadow.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/compiler-rt/test/msan/vararg_shadow.cpp b/compiler-rt/test/msan/vararg_shadow.cpp
index 0c1e5e8d6369c3a..78f1591b3d62bce 100644
--- a/compiler-rt/test/msan/vararg_shadow.cpp
+++ b/compiler-rt/test/msan/vararg_shadow.cpp
@@ -3,8 +3,8 @@
 // Without -fno-sanitize-memory-param-retval we can't even pass poisoned values.
 // RUN: %clangxx_msan -fno-sanitize-memory-param-retval -fsanitize-memory-track-origins=0 -O3 %s -o %t
 
-// Nothing works yet.
-// XFAIL: *
+// The most of targets fail the test.
+// XFAIL: target={{(x86|aarch64|loongarch64|mips|powerpc64).*}}
 
 #include <sanitizer/msan_interface.h>
 #include <stdarg.h>

>From ff502d0f2da5b83780496733f3e64acf8e291700 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka at google.com>
Date: Fri, 17 Nov 2023 14:25:57 -0800
Subject: [PATCH 2/2] update

Created using spr 1.3.4
---
 llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 0cdb269a97b1395..c6f9fb7a88973b5 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -5600,6 +5600,9 @@ struct VarArgSystemZHelper : public VarArgHelperBase {
                        Alignment, RegSaveAreaSize);
   }
 
+
+  // FIXME: This implementation limits OverflowOffset to kParamTLSSize, so we
+  // don't know real overflow size and can't clear shadow beyond kParamTLSSize.
   void copyOverflowArea(IRBuilder<> &IRB, Value *VAListTag) {
     Type *OverflowArgAreaPtrTy = PointerType::getUnqual(*MS.C); // i64*
     Value *OverflowArgAreaPtrPtr = IRB.CreateIntToPtr(