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Reinstate r91208 to fix available_externally linkage for globals, with

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nlewycky's fix to add -rdynamic so the JIT can look symbols up in Linux builds
of the JITTests binary.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91250 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeffrey Yasskin 2009-12-13 20:30:32 +00:00
parent c4174d675b
commit 898e9df8db
3 changed files with 29 additions and 1 deletions
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2
lib/ExecutionEngine/JIT/JIT.cpp
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@ -681,7 +681,7 @@ void *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) {
if (Ptr) return Ptr;
// If the global is external, just remember the address.
if (GV->isDeclaration()) {
if (GV->isDeclaration() || GV->hasAvailableExternallyLinkage()) {
#if HAVE___DSO_HANDLE
if (GV->getName() == "__dso_handle")
return (void*)&__dso_handle;

25
unittests/ExecutionEngine/JIT/JITTest.cpp
View File

@ -534,6 +534,31 @@ TEST_F(JITTest, FunctionPointersOutliveTheirCreator) {
#endif
}
} // anonymous namespace
// This variable is intentionally defined differently in the statically-compiled
// program from the IR input to the JIT to assert that the JIT doesn't use its
// definition.
extern "C" int32_t JITTest_AvailableExternallyGlobal;
int32_t JITTest_AvailableExternallyGlobal = 42;
namespace {
TEST_F(JITTest, AvailableExternallyGlobalIsntEmitted) {
TheJIT->DisableLazyCompilation(true);
LoadAssembly("@JITTest_AvailableExternallyGlobal = "
" available_externally global i32 7 "
" "
"define i32 @loader() { "
" %result = load i32* @JITTest_AvailableExternallyGlobal "
" ret i32 %result "
"} ");
Function *loaderIR = M->getFunction("loader");
int32_t (*loader)() = reinterpret_cast<int32_t(*)()>(
(intptr_t)TheJIT->getPointerToFunction(loaderIR));
EXPECT_EQ(42, loader()) << "func should return 42 from the external global,"
<< " not 7 from the IR version.";
}
// This code is copied from JITEventListenerTest, but it only runs once for all
// the tests in this directory. Everything seems fine, but that's strange
// behavior.

3
unittests/ExecutionEngine/JIT/Makefile
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@ -13,3 +13,6 @@ LINK_COMPONENTS := asmparser core support jit native
include $(LEVEL)/Makefile.config
include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest
# Permit these tests to use the JIT's symbolic lookup.
LD.Flags += $(RDYNAMIC)