[llvm] r365731 - [WebAssembly] Print error message for llvm.clear_cache intrinsic

[Heejin Ahn via llvm-commits]

Author: aheejin
Date: Wed Jul 10 22:55:47 2019
New Revision: 365731

URL: http://llvm.org/viewvc/llvm-project?rev=365731&view=rev
Log:
[WebAssembly] Print error message for llvm.clear_cache intrinsic

Summary:
Wasm does not currently support `llvm.clear_cache` intrinsic, and this
prints a proper error message instead of segfault.

Reviewers: dschuff, sbc100, sunfish

Subscribers: jgravelle-google, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64322

Added:
    llvm/trunk/test/CodeGen/WebAssembly/clear-cache.ll
Modified:
    llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.h

Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.h?rev=365731&r1=365730&r2=365731&view=diff
==============================================================================
--- llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.h (original)
+++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyISelLowering.h Wed Jul 10 22:55:47 2019
@@ -89,6 +89,10 @@ private:
   void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results,
                           SelectionDAG &DAG) const override;
 
+  const char *getClearCacheBuiltinName() const override {
+    report_fatal_error("llvm.clear_cache is not supported on wasm");
+  }
+
   // Custom lowering hooks.
   SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
   SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;

Added: llvm/trunk/test/CodeGen/WebAssembly/clear-cache.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/WebAssembly/clear-cache.ll?rev=365731&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/WebAssembly/clear-cache.ll (added)
+++ llvm/trunk/test/CodeGen/WebAssembly/clear-cache.ll Wed Jul 10 22:55:47 2019
@@ -0,0 +1,13 @@
+; RUN: not llc < %s -asm-verbose=false 2>&1 | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; CHECK: LLVM ERROR: llvm.clear_cache is not supported on wasm
+define void @clear_cache(i8* %begin, i8* %end) {
+entry:
+  call void @llvm.clear_cache(i8* %begin, i8* %end)
+  ret void
+}
+
+declare void @llvm.clear_cache(i8*, i8*)