[llvm][NFC] Update LocalVarDef::CVRegister to fix size MS ABI

[ojhunt]

LocalVarDef::CVRegister being a uint16_t is not enough for the fields to be packed with the MS ABI.

This makes the field a 16 bit a uint32_t

[llvmbot]

@llvm/pr-subscribers-debuginfo

Author: Oliver Hunt (ojhunt)

Changes

LocalVarDef::CVRegister being a uint16_t is not enough for the fields to be packed with the MS ABI.

This makes the field a 16 bit a uint32_t

---

Full diff: https://github.com/llvm/llvm-project/pull/140214.diff

1 Files Affected:

• (modified) llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h (+1-1)

diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
index be6eb4c8998bd..d13b315135ad9 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
@@ -70,7 +70,7 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
 
     /// Register containing the data or the register base of the memory
     /// location containing the data.
-    uint16_t CVRegister;
+    uint32_t CVRegister : 16;
 
     uint64_t static toOpaqueValue(const LocalVarDef DR) {
       uint64_t Val = 0;