[WebAssembly] Eliminate an ad-hoc command-line argument.

Use the target triple to determine whether to run the explicit-locals
pass, rather than using a separate command-line argument.

llvm-svn: 288602

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp
index 56b0f4f..04ede7f 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp
@@ -146,6 +146,11 @@ bool WebAssemblyExplicitLocals::runOnMachineFunction(MachineFunction &MF) {
                   "********** Function: "
                << MF.getName() << '\n');
 
+  // Disable this pass if we aren't doing direct wasm object emission.
+  if (MF.getSubtarget<WebAssemblySubtarget>()
+        .getTargetTriple().isOSBinFormatELF())
+    return false;
+
   bool Changed = false;
   MachineRegisterInfo &MRI = MF.getRegInfo();
   WebAssemblyFunctionInfo &MFI = *MF.getInfo<WebAssemblyFunctionInfo>();