[WebAssembly] Add int32 DW_OP_WASM_location variant

This to allow us to add reloctable global indices as a symbol.
Also adds R_WASM_GLOBAL_INDEX_I32 relocation type to support it.

See discussion in https://github.com/WebAssembly/debugging/issues/12

1 files changed, 2 insertions, 3 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp
index 036c2ae..30647fd 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyFrameLowering.cpp
@@ -266,12 +266,11 @@ WebAssemblyFrameLowering::getDwarfFrameBase(const MachineFunction &MF) const {
   const WebAssemblyFunctionInfo &MFI = *MF.getInfo<WebAssemblyFunctionInfo>();
   if (needsSP(MF) && MFI.isFrameBaseVirtual()) {
     unsigned LocalNum = MFI.getFrameBaseLocal();
-    Loc.Location.WasmLoc = {WebAssembly::TI_LOCAL_START, LocalNum};
+    Loc.Location.WasmLoc = {WebAssembly::TI_LOCAL, LocalNum};
   } else {
     // TODO: This should work on a breakpoint at a function with no frame,
     // but probably won't work for traversing up the stack.
-    // TODO: This needs a relocation for correct __stack_pointer
-    Loc.Location.WasmLoc = {WebAssembly::TI_GLOBAL_START, 0};
+    Loc.Location.WasmLoc = {WebAssembly::TI_GLOBAL_RELOC, 0};
   }
   return Loc;
 }