Add command line options to force function/loop alignments.

These are being added for testing purposes.
http://reviews.llvm.org/D15648

llvm-svn: 256571

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 80d30a5b131..ca4bb1c6ad4 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -47,6 +47,11 @@ using namespace llvm;
 
 #define DEBUG_TYPE "codegen"
 
+static cl::opt<unsigned>
+    AlignAllFunctions("align-all-functions",
+                      cl::desc("Force the alignment of all functions."),
+                      cl::init(0), cl::Hidden);
+
 void MachineFunctionInitializer::anchor() {}
 
 //===----------------------------------------------------------------------===//
@@ -87,6 +92,9 @@ MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM,
     Alignment = std::max(Alignment,
                          STI->getTargetLowering()->getPrefFunctionAlignment());
 
+  if (AlignAllFunctions)
+    Alignment = AlignAllFunctions;
+
   FunctionNumber = FunctionNum;
   JumpTableInfo = nullptr;