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authorDaniel Malea <daniel.malea@intel.com>2013-06-28 19:11:40 +0000
committerDaniel Malea <daniel.malea@intel.com>2013-06-28 19:11:40 +0000
commite16e687034fb416f9e6f90d8e169cc8633c34f35 (patch)
treeb5c4bef1c2439a526f72a5f1fdd41e6115c33fe6 /tools/lli/lli.cpp
parent8e6b2974327c733edf267e971ce5f8982421a888 (diff)
Add flag to lli to enable debugging of IR when used with MCJIT.
- warn users when -debug-ir is used with old JIT engine (only partial debug info is available) For example, to debug an IR file with GDB (that supports JIT registration), do: $ gdb --args lli -use-mcjit -debug-ir testcase.ll (gdb) break main (gdb) run <Process continues to lli main> (gdb) continue <Process continues to testcase.ll main() (gdb) step <Now stepping through the LLVM IR in testcase.ll> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185197 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/lli/lli.cpp')
-rw-r--r--tools/lli/lli.cpp16
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
index 031f945abae..8d74b2326d7 100644
--- a/tools/lli/lli.cpp
+++ b/tools/lli/lli.cpp
@@ -45,6 +45,7 @@
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Transforms/Instrumentation.h"
#include <cerrno>
#ifdef __CYGWIN__
@@ -71,6 +72,10 @@ namespace {
"use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"),
cl::init(false));
+ cl::opt<bool> DebugIR(
+ "debug-ir", cl::desc("Generate debug information to allow debugging IR."),
+ cl::init(false));
+
// The MCJIT supports building for a target address space separate from
// the JIT compilation process. Use a forked process and a copying
// memory manager with IPC to execute using this functionality.
@@ -321,6 +326,17 @@ int main(int argc, char **argv, char * const *envp) {
}
}
+ if (DebugIR) {
+ if (!UseMCJIT) {
+ errs() << "warning: -debug-ir used without -use-mcjit. Only partial debug"
+ << " information will be emitted by the non-MC JIT engine. To see full"
+ << " source debug information, enable the flag '-use-mcjit'.\n";
+
+ }
+ ModulePass *DebugIRPass = createDebugIRPass();
+ DebugIRPass->runOnModule(*Mod);
+ }
+
EngineBuilder builder(Mod);
builder.setMArch(MArch);
builder.setMCPU(MCPU);