[llvm] r181994 - [msan] Switch TLS globals to initial-exec model.

[Evgeniy Stepanov]

Author: eugenis
Date: Thu May 16 04:14:05 2013
New Revision: 181994

URL: http://llvm.org/viewvc/llvm-project?rev=181994&view=rev
Log:
[msan] Switch TLS globals to initial-exec model.

They are always defined in the main executable.

Modified:
    llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp
    llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll

Modified: llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp?rev=181994&r1=181993&r2=181994&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp (original)
+++ llvm/trunk/lib/Transforms/Instrumentation/MemorySanitizer.cpp Thu May 16 04:14:05 2013
@@ -299,30 +299,30 @@ void MemorySanitizer::initializeCallback
   RetvalTLS = new GlobalVariable(
     M, ArrayType::get(IRB.getInt64Ty(), 8), false,
     GlobalVariable::ExternalLinkage, 0, "__msan_retval_tls", 0,
-    GlobalVariable::GeneralDynamicTLSModel);
+    GlobalVariable::InitialExecTLSModel);
   RetvalOriginTLS = new GlobalVariable(
     M, OriginTy, false, GlobalVariable::ExternalLinkage, 0,
-    "__msan_retval_origin_tls", 0, GlobalVariable::GeneralDynamicTLSModel);
+    "__msan_retval_origin_tls", 0, GlobalVariable::InitialExecTLSModel);
 
   ParamTLS = new GlobalVariable(
     M, ArrayType::get(IRB.getInt64Ty(), 1000), false,
     GlobalVariable::ExternalLinkage, 0, "__msan_param_tls", 0,
-    GlobalVariable::GeneralDynamicTLSModel);
+    GlobalVariable::InitialExecTLSModel);
   ParamOriginTLS = new GlobalVariable(
     M, ArrayType::get(OriginTy, 1000), false, GlobalVariable::ExternalLinkage,
-    0, "__msan_param_origin_tls", 0, GlobalVariable::GeneralDynamicTLSModel);
+    0, "__msan_param_origin_tls", 0, GlobalVariable::InitialExecTLSModel);
 
   VAArgTLS = new GlobalVariable(
     M, ArrayType::get(IRB.getInt64Ty(), 1000), false,
     GlobalVariable::ExternalLinkage, 0, "__msan_va_arg_tls", 0,
-    GlobalVariable::GeneralDynamicTLSModel);
+    GlobalVariable::InitialExecTLSModel);
   VAArgOverflowSizeTLS = new GlobalVariable(
     M, IRB.getInt64Ty(), false, GlobalVariable::ExternalLinkage, 0,
     "__msan_va_arg_overflow_size_tls", 0,
-    GlobalVariable::GeneralDynamicTLSModel);
+    GlobalVariable::InitialExecTLSModel);
   OriginTLS = new GlobalVariable(
     M, IRB.getInt32Ty(), false, GlobalVariable::ExternalLinkage, 0,
-    "__msan_origin_tls", 0, GlobalVariable::GeneralDynamicTLSModel);
+    "__msan_origin_tls", 0, GlobalVariable::InitialExecTLSModel);
 
   // We insert an empty inline asm after __msan_report* to avoid callback merge.
   EmptyAsm = InlineAsm::get(FunctionType::get(IRB.getVoidTy(), false),

Modified: llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll?rev=181994&r1=181993&r2=181994&view=diff
==============================================================================
--- llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll (original)
+++ llvm/trunk/test/Instrumentation/MemorySanitizer/msan_basic.ll Thu May 16 04:14:05 2013
@@ -5,8 +5,17 @@ target datalayout = "e-p:64:64:64-i1:8:8
 ; Check the presence of __msan_init
 ; CHECK: @llvm.global_ctors {{.*}} @__msan_init
 
-; Check the presence and the linkage type of __msan_track_origins
+; Check the presence and the linkage type of __msan_track_origins and
+; other interface symbols.
 ; CHECK: @__msan_track_origins = weak_odr constant i32 0
+; CHECK: @__msan_keep_going = weak_odr constant i32 0
+; CHECK: @__msan_retval_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_retval_origin_tls = external thread_local(initialexec) global i32
+; CHECK: @__msan_param_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_param_origin_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_va_arg_tls = external thread_local(initialexec) global [{{.*}}]
+; CHECK: @__msan_va_arg_overflow_size_tls = external thread_local(initialexec) global i64
+; CHECK: @__msan_origin_tls = external thread_local(initialexec) global i32
 
 
 ; Check instrumentation of stores