diff --git a/.azure-pipelines/lib.sh b/.azure-pipelines/lib.sh
index fa922ccb78..8ae6ac0bd9 100644
--- a/.azure-pipelines/lib.sh
+++ b/.azure-pipelines/lib.sh
@@ -8,16 +8,18 @@ clone() {
     local url="$1"
     local path="$2"
     local branch="$3"
-    for i in {0..4}; do
-        if git clone --depth 1 --branch "$branch" "$url" "$path" "${@:4}" --quiet; then
-            break
-        elif [ $i -lt 4 ]; then
-            sleep $((1 << $i))
-        else
-            echo "Failed to clone: ${url}"
-            exit 1
-        fi
-    done
+    if [ ! -d $path ]; then
+        for i in {0..4}; do
+            if git clone --depth 1 --branch "$branch" "$url" "$path" "${@:4}" --quiet; then
+                break
+            elif [ $i -lt 4 ]; then
+                sleep $((1 << $i))
+            else
+                echo "Failed to clone: ${url}"
+                exit 1
+            fi
+        done
+    fi
 }
 
 download() {
@@ -43,8 +45,10 @@ install_grep() {
     local tools_dir="${DMD_DIR}/tools"
     mkdir -p "$tools_dir"
     cd "$tools_dir"
-    download "http://downloads.dlang.org/other/grep-3.1.zip" "grep-3.1.zip"
-    unzip "grep-3.1.zip" # contains grep.exe
+    if [ ! -f grep.exe ]; then
+        download "http://downloads.dlang.org/other/grep-3.1.zip" "grep-3.1.zip"
+        unzip "grep-3.1.zip" # contains grep.exe
+    fi
     export PATH="${tools_dir}:$PATH"
 }
 
diff --git a/.azure-pipelines/windows.sh b/.azure-pipelines/windows.sh
index b24a19d253..2d9260c0e7 100644
--- a/.azure-pipelines/windows.sh
+++ b/.azure-pipelines/windows.sh
@@ -9,14 +9,24 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 GNU_MAKE="$(which make)"
 
 install_host_dmd() {
-    download "http://downloads.dlang.org/releases/2.x/${HOST_DMD_VERSION}/dmd.${HOST_DMD_VERSION}.windows.7z" dmd2.7z
-    7z x dmd2.7z > /dev/null
+    if [ ! -f dmd2/README.TXT ]; then
+        download "http://downloads.dlang.org/releases/2.x/${HOST_DMD_VERSION}/dmd.${HOST_DMD_VERSION}.windows.7z" dmd2.7z
+        7z x dmd2.7z > /dev/null
+    fi
     export PATH="$PWD/dmd2/windows/bin/:$PATH"
     export HOST_DC="$PWD/dmd2/windows/bin/dmd.exe"
     export DM_MAKE="$PWD/dmd2/windows/bin/make.exe"
     dmd --version
 }
 
+install_host_dmc() {
+    if [ ! -f dm/README.TXT ]; then
+        download "http://downloads.dlang.org/other/dm857c.zip" dmc.zip
+        7z x dmc.zip > /dev/null
+    fi
+    dm/bin/dmc | head -n 1 || true
+}
+
 ################################################################################
 # Setup required tools
 ################################################################################
@@ -25,11 +35,29 @@ install_host_dmd() {
 # REASON: the preinstalled version is buggy (see also: https://github.com/dlang/dmd/pull/9398#issuecomment-468773638)
 install_grep
 
+if [ "$HOST_DMD_VERSION" == "LATEST" ]; then
+    download "http://downloads.dlang.org/releases/LATEST" LATEST
+    HOST_DMD_VERSION="$(cat LATEST)"
+fi
 echo "D_VERSION: $HOST_DMD_VERSION"
 echo "VSINSTALLDIR: $VSINSTALLDIR"
 echo "GNU_MAKE: $("${GNU_MAKE}" --version)"
 echo "GREP_VERSION: $(grep --version)"
 
+################################################################################
+# Prepare C compiler
+################################################################################
+
+if [ "$MODEL" == "32" ] ; then
+    install_host_dmc
+    export CC="$PWD/dm/bin/dmc.exe"
+    export AR="$PWD/dm/bin/lib.exe"
+else
+    export CC="$(where cl.exe)"
+    export AR="$(where lib.exe)" # must be done before installing dmd
+    export MSVC_AR="$AR"         # for msvc-lib
+fi
+
 ################################################################################
 # Install the host compiler
 ################################################################################
@@ -51,15 +79,18 @@ clone_repos
 # Prepare build flags
 ################################################################################
 
-export CC="${MSVC_CC}"
-export AR="${MSVC_AR}"
-
 if [ "$MODEL" == "64" ] ; then
     export MODEL_FLAG="-m64"
     MAKE_FILE="win64.mak"
+    LIBNAME=phobos64.lib
+elif [ "$MODEL" == "32mscoff" ] ; then
+    export MODEL_FLAG="-m32mscoff"
+    MAKE_FILE="win64.mak"
+    LIBNAME=phobos32mscoff.lib
 else
     export MODEL_FLAG="-m32"
     MAKE_FILE="win32.mak"
+    LIBNAME=phobos.lib
 fi
 
 ################################################################################
@@ -71,22 +102,15 @@ DMD_BIN_PATH="$DMD_DIR/generated/windows/release/${MODEL}/dmd"
 cd "${DMD_DIR}/src"
 "${DM_MAKE}" -f "${MAKE_FILE}" reldmd DMD="$DMD_BIN_PATH"
 
-################################################################################
-# WORKAROUND: Make the paths to CC and AR whitespace free
-# REASON: Druntime & Phobos Makefiles as the variables don't use quotation
-################################################################################
-
-ln -s "$(dirname "$CC")" "${DMD_DIR}/../ccdir"
-export CC="$DMD_DIR/../ccdir/cl.exe"
-export AR="$DMD_DIR/../ccdir/lib.exe"
-
 ################################################################################
 # WORKAROUND: Build zlib separately with DigitalMars make
 # REASON: whitespace path variables in DigitalMars make from indirect invocation from Phobos
 ################################################################################
 
-cd "${DMD_DIR}/../phobos/etc/c/zlib"
-${DM_MAKE} -f win64.mak "MODEL=${MODEL}" "zlib${MODEL}.lib" CC="${CC}" LIB="${AR}" VCDIR="${VCINSTALLDIR}"
+if [ "$MODEL" != "32" ] ; then
+    cd "${DMD_DIR}/../phobos/etc/c/zlib"
+    ${DM_MAKE} -f win64.mak MODEL=${MODEL} "zlib${MODEL}.lib" "CC=$CC" "LIB=$AR" VCDIR=.
+fi
 
 ################################################################################
 # Build Druntime and Phobos
@@ -94,7 +118,7 @@ ${DM_MAKE} -f win64.mak "MODEL=${MODEL}" "zlib${MODEL}.lib" CC="${CC}" LIB="${AR
 
 for proj in druntime phobos; do
     cd "${DMD_DIR}/../${proj}"
-    "${DM_MAKE}" -f "${MAKE_FILE}" DMD="$DMD_BIN_PATH" CC="$CC" AR="$MSVC_AR" VCDIR="${VCINSTALLDIR}" CFLAGS="/C7"
+    "${DM_MAKE}" -f "${MAKE_FILE}" MODEL=$MODEL DMD="$DMD_BIN_PATH" "CC=$CC" "AR=$AR" VCDIR=.
 done
 
 ################################################################################
@@ -104,7 +128,7 @@ cd "${DMD_DIR}/test"
 
 # WORKAROUND: Copy the built Phobos library in the path
 # REASON: LIB argument doesn't seem to work
-cp "${DMD_DIR}/../phobos/phobos64.lib" .
+cp "${DMD_DIR}/../phobos/$LIBNAME" .
 
 DMD_TESTSUITE_MAKE_ARGS="-j$N" "${GNU_MAKE}" -j1 start_all_tests ARGS="-O -inline -g" MODEL="$MODEL"  MODEL_FLAG="$MODEL_FLAG"
 
@@ -114,5 +138,5 @@ DMD_TESTSUITE_MAKE_ARGS="-j$N" "${GNU_MAKE}" -j1 start_all_tests ARGS="-O -inlin
 
 mkdir -p "${DMD_DIR}/artifacts"
 cd "${DMD_DIR}/artifacts"
-cp "${DMD_DIR}/../phobos/phobos64.lib" .
+cp "${DMD_DIR}/../phobos/$LIBNAME" .
 cp "${DMD_BIN_PATH}" .
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index eb9d0934c8..1056f8e423 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -1,7 +1,4 @@
 # Learn more: https://aka.ms/yaml
-variables:
-  HOST_DMD_VERSION: 2.084.1
-
 jobs:
   - job: Windows
     timeoutInMinutes: 120
@@ -9,6 +6,7 @@ jobs:
       vmImage: 'vs2017-win2016'
     variables:
       VSINSTALLDIR: C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\
+      HOST_DMD_VERSION: 2.084.1
     strategy:
       matrix:
         x64:
@@ -16,11 +14,22 @@ jobs:
           MODEL: 64
           ARCH: x64
           D_COMPILER: dmd
-        #x86:
-          #OS: Win_32
-          #MODEL: 32
-          #ARCH: x86
-          #D_COMPILER: dmd
+    steps:
+      - template: .azure-pipelines/windows.yml
+  - job: Windows_OMF
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'vs2017-win2016'
+    variables:
+      VSINSTALLDIR: C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\
+      HOST_DMD_VERSION: LATEST
+    strategy:
+      matrix:
+        x64:
+          OS: Win_32
+          MODEL: 32
+          ARCH: x86
+          D_COMPILER: dmd
     steps:
       - template: .azure-pipelines/windows.yml
   - job: Windows_VisualD