Directly point debug info to the stack slot of the arugment, instead of trying to keep track of vreg in which it the arugment is copied. The LiveDebugVariable can keep track of variable's ranges.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139330 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 7 deletions

diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 226edc64a1..fbd0c623eb 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -531,13 +531,10 @@ bool FastISel::SelectCall(const User *I) {
     unsigned Reg = 0;
     unsigned Offset = 0;
     if (const Argument *Arg = dyn_cast<Argument>(Address)) {
-      if (Arg->hasByValAttr()) {
-        // Byval arguments' frame index is recorded during argument lowering.
-        // Use this info directly.
-        Offset = FuncInfo.getByValArgumentFrameIndex(Arg);
-        if (Offset)
-          Reg = TRI.getFrameRegister(*FuncInfo.MF);
-      }
+      // Some arguments' frame index is recorded during argument lowering.
+      Offset = FuncInfo.getArgumentFrameIndex(Arg);
+      if (Offset)
+	Reg = TRI.getFrameRegister(*FuncInfo.MF);
     }
     if (!Reg)
       Reg = getRegForValue(Address);