; RUN: llvm-as < %s >%t1
; RUN: llvm-lto -o %t2 %t1
+; RUN: llvm-nm %t2 | FileCheck %s -check-prefix=NOEXPORT
+; RUN: llvm-lto -o %t3 -exported-symbol=main %t1
+; RUN: llvm-nm %t3 | FileCheck %s -check-prefix=EXPORT
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare void @PR14512()
+; Without -exported-symbol, main should be eliminated by LTO.
+; With -exported-symbol=main, main should be preserved by LTO.
define i32 @main(i32 %argc, i8** %argv) {
+; NOEXPORT-NOT: main
+; EXPORT: main
call void @PR14512()
ret i32 0
}
cl::desc("Override output filename"),
cl::value_desc("filename"));
+static cl::list<std::string>
+ExportedSymbols("exported-symbol",
+ cl::desc("Symbol to export from the resulting object file"),
+ cl::ZeroOrMore);
+
+
int main(int argc, char **argv) {
// Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
}
}
+ // Add all the exported symbols to the table of symbols to preserve.
+ for (unsigned i = 0; i < ExportedSymbols.size(); ++i)
+ CodeGen.addMustPreserveSymbol(ExportedSymbols[i].c_str());
+
if (!OutputFilename.empty()) {
size_t len = 0;
std::string ErrorInfo;