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authorJustin Bogner <mail@justinbogner.com>2013-11-12 21:44:01 +0000
committerJustin Bogner <mail@justinbogner.com>2013-11-12 21:44:01 +0000
commitdc6b4b4fc2665eea17684d29e4dae219b258b5ef (patch)
tree3098f3760218f627a65eb20fe6b2935d088dfe63 /include/llvm
parent59e648e3c8966e0678902a2994558f25c8573ce4 (diff)
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Protect user-supplied runtime library functions in LTO
Add user-supplied C runtime and compiler-rt library functions to llvm.compiler.used to protect them from premature optimization by passes like -globalopt and -ipsccp. Calls to (seemingly unused) runtime library functions can be added by -instcombine and instruction lowering. Patch by Duncan Exon Smith, thanks! Fixes <rdar://problem/14740087> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194514 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm')
-rw-r--r--include/llvm/LTO/LTOCodeGenerator.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/LTO/LTOCodeGenerator.h b/include/llvm/LTO/LTOCodeGenerator.h
index 97a5066..c478bd9 100644
--- a/include/llvm/LTO/LTOCodeGenerator.h
+++ b/include/llvm/LTO/LTOCodeGenerator.h
@@ -38,6 +38,7 @@
#include "llvm-c/lto.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/Linker.h"
#include "llvm/Target/TargetOptions.h"
#include <string>
@@ -48,6 +49,7 @@ namespace llvm {
class GlobalValue;
class Mangler;
class MemoryBuffer;
+ class TargetLibraryInfo;
class TargetMachine;
class raw_ostream;
}
@@ -125,6 +127,7 @@ private:
std::string &errMsg);
void applyScopeRestrictions();
void applyRestriction(llvm::GlobalValue &GV,
+ const llvm::ArrayRef<llvm::StringRef> &Libcalls,
std::vector<const char*> &MustPreserveList,
llvm::SmallPtrSet<llvm::GlobalValue*, 8> &AsmUsed,
llvm::Mangler &Mangler);