1 files changed, 16 insertions, 5 deletions
diff --git a/clang/lib/Basic/Targets/WebAssembly.h b/clang/lib/Basic/Targets/WebAssembly.h
index eba7422..4de6ce6 100644
--- a/clang/lib/Basic/Targets/WebAssembly.h
+++ b/clang/lib/Basic/Targets/WebAssembly.h
@@ -88,12 +88,23 @@ public:
     LongDoubleWidth = LongDoubleAlign = 128;
     LongDoubleFormat = &llvm::APFloat::IEEEquad();
     MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
-    // size_t being unsigned long for both wasm32 and wasm64 makes mangled names
-    // more consistent between the two.
-    SizeType = UnsignedLong;
-    PtrDiffType = SignedLong;
-    IntPtrType = SignedLong;
     HasUnalignedAccess = true;
+    if (T.isWALI()) {
+      // The WALI ABI is documented here:
+      // https://doc.rust-lang.org/rustc/platform-support/wasm32-wali-linux.html
+      // Currently, this ABI only applies to wasm32 targets and notably requires
+      // 64-bit longs
+      LongAlign = LongWidth = 64;
+      SizeType = UnsignedInt;
+      PtrDiffType = SignedInt;
+      IntPtrType = SignedInt;
+    } else {
+      // size_t being unsigned long for both wasm32 and wasm64 makes mangled
+      // names more consistent between the two.
+      SizeType = UnsignedLong;
+      PtrDiffType = SignedLong;
+      IntPtrType = SignedLong;
+    }
   }
 
   StringRef getABI() const override;