message: Appveyor: LLVM 10.0 & 11.1 => 11.1 & 12.0
diff: -# Copyright (c) 2018-2020, Intel Corporation
  +# Copyright (c) 2018-2021, Intel Corporation
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  configuration: Release
  environment:
  - LLVM_LATEST: 11.1
  + LLVM_LATEST: 12.0
  DOCKER_PATH: "ispc/test_repo"
  matrix:
  - APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu1604
  @@ -40,7 +40,7 @@ environment:
  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
  LLVM_VERSION: latest
  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
  - LLVM_VERSION: 10.0
  + LLVM_VERSION: 11.1
  for:
  -
  @@ -58,7 +58,8 @@ for:
  if "%LLVM_VERSION%"=="latest" (set WASM=ON)
  if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2017" ( (set generator="Visual Studio 15 Win64") & (set vsversion=2017))
  if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2019" ( (set generator="Visual Studio 16") & (set vsversion=2019))
  - set LLVM_TAR=llvm-11.1.0-win.vs2019-Release+Asserts-x86.arm.wasm.7z
  + set LLVM_TAR=llvm-12.0.0-win.vs2019-Release+Asserts-x86.arm.wasm.7z
  + if "%LLVM_VERSION%"=="11.1" (set LLVM_TAR=llvm-11.1.0-win.vs2019-Release+Asserts-x86.arm.wasm.7z)
  if "%LLVM_VERSION%"=="10.0" (set LLVM_TAR=llvm-10.0.1-win.vs2019-Release+Asserts-x86.arm.wasm.zip)
  install:
  - ps: choco install --no-progress winflexbison3 wget 7zip
  @@ -108,7 +109,7 @@ for:
  export LLVM_HOME=$APPVEYOR_BUILD_FOLDER/llvm
  export CROSS_TOOLS=/usr/local/src/cross
  export WASM=OFF
  - export LLVM_TAR=llvm-11.1.0-ubuntu16.04-Release+Asserts-x86.arm.wasm.tar.xz
  + export LLVM_TAR=llvm-12.0.0-ubuntu16.04-Release+Asserts-x86.arm.wasm.tar.xz
  install:
  - sh: |-
  sudo apt-get update
  