[llvm] r268991 - [WebAssembly] Disable 128-bit shift libcalls

[Derek Schuff via llvm-commits]

Author: dschuff
Date: Mon May  9 19:14:07 2016
New Revision: 268991

URL: http://llvm.org/viewvc/llvm-project?rev=268991&view=rev
Log:
[WebAssembly] Disable 128-bit shift libcalls

Currently the signature of the functions
i128(i128, i32) aka void(i32, i64, i64, i32) doesn't match the signature
of the call emitted by the default lowering, void(i32, i64, i64).

Modified:
    llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp

Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp?rev=268991&r1=268990&r2=268991&view=diff
==============================================================================
--- llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp Mon May  9 19:14:07 2016
@@ -135,6 +135,13 @@ WebAssemblyTargetLowering::WebAssemblyTa
 
   // Trap lowers to wasm unreachable
   setOperationAction(ISD::TRAP, MVT::Other, Legal);
+
+  // Disable 128-bit shift libcalls. Currently the signature of the functions
+  // i128(i128, i32) aka void(i32, i64, i64, i32) doesn't match the signature
+  // of the call emitted by the default lowering, void(i32, i64, i64).
+  setLibcallName(RTLIB::SRL_I128, nullptr);
+  setLibcallName(RTLIB::SRA_I128, nullptr);
+  setLibcallName(RTLIB::SHL_I128, nullptr);
 }
 
 FastISel *WebAssemblyTargetLowering::createFastISel(