From b1de9566800485b60c209d7f093c77694b78d7a6 Mon Sep 17 00:00:00 2001 From: Heejin Ahn Date: Thu, 11 Jul 2019 05:55:47 +0000 Subject: [PATCH] [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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365731 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/WebAssembly/WebAssemblyISelLowering.h | 4 ++++ test/CodeGen/WebAssembly/clear-cache.ll | 13 +++++++++++++ 2 files changed, 17 insertions(+) create mode 100644 test/CodeGen/WebAssembly/clear-cache.ll diff --git a/lib/Target/WebAssembly/WebAssemblyISelLowering.h b/lib/Target/WebAssembly/WebAssemblyISelLowering.h index ce4ef1478d5..b3c7f3defd5 100644 --- a/lib/Target/WebAssembly/WebAssemblyISelLowering.h +++ b/lib/Target/WebAssembly/WebAssemblyISelLowering.h @@ -89,6 +89,10 @@ private: void ReplaceNodeResults(SDNode *N, SmallVectorImpl &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; diff --git a/test/CodeGen/WebAssembly/clear-cache.ll b/test/CodeGen/WebAssembly/clear-cache.ll new file mode 100644 index 00000000000..cab94882823 --- /dev/null +++ b/test/CodeGen/WebAssembly/clear-cache.ll @@ -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*) -- 2.40.0