build: add support for testing more of the compilers on Windows

This adds the ability to conditionally run the test suite for LLVM, LLD,
LLDB, Clang, and Swift.  This will allow us to increase the test
coverage in CI to avoid regressions.

Author: compnerd

utils/build.ps1

@@ -888,18 +888,36 @@ function Build-BuildTools($Arch) {
     }
 }
 
-function Build-Compilers($Arch, [switch]$Test = $false) {
+function Build-Compilers() {
+  [CmdletBinding(PositionalBinding = $false)]
+  param
+  (
+    [Parameter(Position = 0, Mandatory = $true)]
+    [hashtable]$Arch,
+    [switch]$TestClang = $false,
+    [switch]$TestLLD = $false,
+    [switch]$TestLLDB = $false,
+    [switch]$TestLLVM = $false,
+    [switch]$TestSwift = $false
+  )
+
   Isolate-EnvVars {
-    if ($Test) {
+    if ($TestClang -or $TestLLD -or $TestLLDB -or $TestLLVM -or $TestSwift) {
       $LibdispatchBinDir = "$BinaryCache\1\tools\swift\libdispatch-windows-$($Arch.LLVMName)-prefix\bin"
-      $env:Path = "$LibdispatchBinDir;$BinaryCache\1\bin;$env:Path;$UnixToolsBinDir"
-      $Targets = @("check-swift")
+      $env:Path = "$LibdispatchBinDir;$BinaryCache\1\bin;$env:Path;$VSInstallRoot\DIA SDK\bin\$($HostArch.VSName);$UnixToolsBinDir"
+      $Targets = @()
       $TestingDefines = @{
         SWIFT_BUILD_DYNAMIC_SDK_OVERLAY = "YES";
         SWIFT_BUILD_DYNAMIC_STDLIB = "YES";
         SWIFT_BUILD_REMOTE_MIRROR = "YES";
         SWIFT_NATIVE_SWIFT_TOOLS_PATH = "";
       }
+
+      if ($TestClang) { $Targets += @("check-clang") }
+      if ($TestLLD) { $Targets += @("check-lld") }
+      if ($TestLLDB) { $Targets += @("check-lldb") }
+      if ($TestLLVM) { $Targets += @("check-llvm") }
+      if ($TestSwift) { $Targets += @("check-swift") }
     } else {
       $Targets = @("distribution", "install-distribution")
       $TestingDefines = @{
@@ -1801,7 +1819,17 @@ if ($Stage) {
   Stage-BuildArtifacts $HostArch
 }
 
-if ($Test -contains "swift") { Build-Compilers $HostArch -Test }
+if ($Test -ne $null -and (Compare-Object $Test @("clang", "lld", "lldb", "llvm", "swift") -PassThru -IncludeEqual -ExcludeDifferent) -ne $null) {
+  $Tests = @{
+    "-TestClang" = $Test -contains "clang";
+    "-TestLLD" = $Test -contains "lld";
+    "-TestLLDB" = $Test -contains "lldb";
+    "-TestLLVM" = $Test -contains "llvm";
+    "-TestSwift" = $Test -contains "swift";
+  }
+  Build-Compilers $HostArch @Tests
+}
+
 if ($Test -contains "dispatch") { Build-Dispatch $HostArch -Test }
 if ($Test -contains "foundation") { Build-Foundation $HostArch -Test }
 if ($Test -contains "xctest") { Build-XCTest $HostArch -Test }