add an option for timing bc file reading.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33977 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-dis/llvm-dis.cpp b/tools/llvm-dis/llvm-dis.cpp
index d2022fd..e4ed2b3 100644
--- a/tools/llvm-dis/llvm-dis.cpp
+++ b/tools/llvm-dis/llvm-dis.cpp
@@ -39,6 +39,9 @@
static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
+static cl::opt<bool>
+DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
+
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
try {
@@ -58,7 +61,9 @@
return 1;
}
- if (OutputFilename != "") { // Specified an output filename?
+ if (DontPrint) {
+ // Just use stdout. We won't actually print anything on it.
+ } else if (OutputFilename != "") { // Specified an output filename?
if (OutputFilename != "-") { // Not stdout?
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
@@ -102,10 +107,12 @@
}
// All that llvm-dis does is write the assembly to a file.
- PassManager Passes;
- OStream L(*Out);
- Passes.add(new PrintModulePass(&L));
- Passes.run(*M.get());
+ if (!DontPrint) {
+ PassManager Passes;
+ OStream L(*Out);
+ Passes.add(new PrintModulePass(&L));
+ Passes.run(*M.get());
+ }
if (Out != &std::cout) {
((std::ofstream*)Out)->close();