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[WebAssembly] Fix crash when @llvm.global_dtors is external

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Reviewers: aheejin

Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58799

llvm-svn: 355157
This commit is contained in:
Thomas Lively 2019-03-01 00:12:13 +00:00
parent f84f2517d5
commit 24389ccbc7
2 changed files with 10 additions and 1 deletions
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2
lib/Target/WebAssembly/WebAssemblyLowerGlobalDtors.cpp
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@ -61,7 +61,7 @@ bool LowerGlobalDtors::runOnModule(Module &M) {
LLVM_DEBUG(dbgs() << "********** Lower Global Destructors **********\n");
GlobalVariable *GV = M.getGlobalVariable("llvm.global_dtors");
if (!GV)
if (!GV || !GV->hasInitializer())
return false;
const ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());

9
test/CodeGen/WebAssembly/global_dtors.ll Normal file
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@ -0,0 +1,9 @@
; RUN: llc < %s
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
; Check that we do not crash when attempting to lower away
; global_dtors without a definition.
@llvm.global_dtors = external global [2 x { i32, void ()*, i8* }]