From: Derek Schuff <dschuff@google.com>
Date: Tue, 10 May 2016 00:14:07 +0000 (+0000)
Subject: [WebAssembly] Disable 128-bit shift libcalls
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=42a519609886359fc6b518f526d7922939ac0d7d;p=llvm

[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 4839a324214..3292dc485d8 100644
--- 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(