CodeGen: Remove -disable-debug-info-print cl::opt

This was first introduced way back in in 2010 by
6c74a87, and has little evidence
of use. Only one test attempts to make use of this, but it's
also redundant since it's also using strip to drop debug info anyway
(and that also makes the test buggy, since it's intended to test
with and without debug info).

The other tests using it were only added to test the option after
discovering it was untested and moved, in later commits.

Author: arsenm

llvm/lib/CodeGen/MachineModuleInfo.cpp

@@ -31,10 +31,6 @@
 using namespace llvm;
 using namespace llvm::dwarf;
 
-static cl::opt<bool>
-    DisableDebugInfoPrinting("disable-debug-info-print", cl::Hidden,
-                             cl::desc("Disable debug info printing"));
-
 // Out of line virtual method.
 MachineModuleInfoImpl::~MachineModuleInfoImpl() = default;
 
@@ -224,8 +220,7 @@ bool MachineModuleInfoWrapperPass::doInitialization(Module &M) {
         Ctx.diagnose(
             DiagnosticInfoSrcMgr(SMD, M.getName(), IsInlineAsm, LocCookie));
       });
-  MMI.DbgInfoAvailable = !DisableDebugInfoPrinting &&
-                         !M.debug_compile_units().empty();
+  MMI.DbgInfoAvailable = !M.debug_compile_units().empty();
   return false;
 }
 
@@ -250,7 +245,6 @@ MachineModuleAnalysis::run(Module &M, ModuleAnalysisManager &) {
         Ctx.diagnose(
             DiagnosticInfoSrcMgr(SMD, M.getName(), IsInlineAsm, LocCookie));
       });
-  MMI.DbgInfoAvailable =
-      !DisableDebugInfoPrinting && !M.debug_compile_units().empty();
+  MMI.DbgInfoAvailable = !M.debug_compile_units().empty();
   return Result(MMI);
 }

llvm/test/CodeGen/Generic/disable-debug-info-print.ll

@@ -1,5 +1,5 @@
-; RUN: llc -mtriple=x86_64-linux-gnueabi -disable-debug-info-print < %s | FileCheck %s
-; RUN: opt -passes=strip -S < %s | llc -mtriple=x86_64-linux-gnueabi -disable-debug-info-print | FileCheck %s
+; RUN: llc -mtriple=x86_64-linux-gnueabi < %s | FileCheck %s
+; RUN: opt -passes=strip -S < %s | llc -mtriple=x86_64-linux-gnueabi | FileCheck %s
 
 ; This test checks if the code is generated correctly with and without debug info.