allow marking of loads and stores in the instruction stream with enough information to reconstruct the Value* if it existed
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22195 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index ff5d268..1f11065 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -45,6 +45,9 @@
cl::opt<bool> EnableAlphaCount("enable-alpha-count",
cl::desc("Print estimates on live ins and outs"),
cl::Hidden);
+ cl::opt<bool> EnableAlphaLSMark("enable-alpha-lsmark",
+ cl::desc("Emit symbols to corrolate Mem ops to LLVM Values"),
+ cl::Hidden);
}
namespace {
@@ -514,6 +517,27 @@
}
}
+//Find the offset of the arg in it's parent's function
+static int getValueOffset(const Value* v)
+{
+ if (v == NULL)
+ return 0;
+
+ const Instruction* itarget = dyn_cast<Instruction>(v);
+ const BasicBlock* btarget = itarget->getParent();
+ const Function* ftarget = btarget->getParent();
+
+ //offset due to earlier BBs
+ int i = 0;
+ for(Function::const_iterator ii = ftarget->begin(); &*ii != btarget; ++ii)
+ i += ii->size();
+
+ for(BasicBlock::const_iterator ii = btarget->begin(); &*ii != itarget; ++ii)
+ ++i;
+
+ return i;
+}
+
//Factorize a number using the list of constants
static bool factorize(int v[], int res[], int size, uint64_t c)
{
@@ -1119,6 +1143,12 @@
Select(Chain);
Opc = DestType == MVT::f64 ? Alpha::LDT : Alpha::LDS;
+ if (EnableAlphaLSMark)
+ {
+ int i = getValueOffset(dyn_cast<SrcValueSDNode>(N.getOperand(2))->getValue());
+ BuildMI(BB, Alpha::MEMLABEL, 2).addImm(i);
+ }
+
if (Address.getOpcode() == ISD::GlobalAddress) {
AlphaLowering.restoreGP(BB);
Opc = GetSymVersion(Opc);