[lld][WebAssemby] Allow import module names to be empty strings.

The component-model [canonical ABI] is currently using import names with
empty strings. Remove the special cases for empty strings from
WasmObjectFile.cpp so that they can pass through as-is.

[canonical ABI]: https://github.com/WebAssembly/component-model/blob/main/design/mvp/CanonicalABI.md

Differential Revision: https://reviews.llvm.org/D133037

1 files changed, 4 insertions, 12 deletions

diff --git a/llvm/lib/Object/WasmObjectFile.cpp b/llvm/lib/Object/WasmObjectFile.cpp
index d00359c..0e24ac9 100644
--- a/llvm/lib/Object/WasmObjectFile.cpp
+++ b/llvm/lib/Object/WasmObjectFile.cpp
@@ -640,9 +640,7 @@ Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
           Info.Name = Import.Field;
         }
         Signature = &Signatures[Import.SigIndex];
-        if (!Import.Module.empty()) {
-          Info.ImportModule = Import.Module;
-        }
+        Info.ImportModule = Import.Module;
       }
       break;
 
@@ -672,9 +670,7 @@ Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
           Info.Name = Import.Field;
         }
         GlobalType = &Import.Global;
-        if (!Import.Module.empty()) {
-          Info.ImportModule = Import.Module;
-        }
+        Info.ImportModule = Import.Module;
       }
       break;
 
@@ -704,9 +700,7 @@ Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
           Info.Name = Import.Field;
         }
         TableType = &Import.Table;
-        if (!Import.Module.empty()) {
-          Info.ImportModule = Import.Module;
-        }
+        Info.ImportModule = Import.Module;
       }
       break;
 
@@ -769,9 +763,7 @@ Error WasmObjectFile::parseLinkingSectionSymtab(ReadContext &Ctx) {
           Info.Name = Import.Field;
         }
         Signature = &Signatures[Import.SigIndex];
-        if (!Import.Module.empty()) {
-          Info.ImportModule = Import.Module;
-        }
+        Info.ImportModule = Import.Module;
       }
       break;
     }