[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).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268991 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
index 4839a324214728e8bd42c271e75b4f91f011cfe2..3292dc485d8f008b557ce7fc8a899c3e11435f91 100644 (file)
--- a/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
+++ b/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -135,6 +135,13 @@ WebAssemblyTargetLowering::WebAssemblyTargetLowering(
 
   // 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(