From c4ed142e695f14ba5675ec6d12226ee706329a0f Mon Sep 17 00:00:00 2001
From: Cyndy Ishida <cyndy_ishida@apple.com>
Date: Thu, 6 May 2021 16:18:55 -0700
Subject: [llvm][TextAPI] add mapping from OS string to Platform

* add utility for matching target triple OS value strings  to PlatformKind

This was reviewed offline by ributzka, steven_wu
---
 llvm/lib/TextAPI/Platform.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'llvm/lib/TextAPI/Platform.cpp')

diff --git a/llvm/lib/TextAPI/Platform.cpp b/llvm/lib/TextAPI/Platform.cpp
index d68a0dd..2e6b885 100644
--- a/llvm/lib/TextAPI/Platform.cpp
+++ b/llvm/lib/TextAPI/Platform.cpp
@@ -12,6 +12,7 @@
 
 #include "llvm/TextAPI/Platform.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
 
 namespace llvm {
@@ -89,5 +90,20 @@ StringRef getPlatformName(PlatformKind Platform) {
   llvm_unreachable("Unknown llvm.MachO.PlatformKind enum");
 }
 
+PlatformKind getPlatformFromName(StringRef Name) {
+  return StringSwitch<PlatformKind>(Name)
+      .Case("macos", PlatformKind::macOS)
+      .Case("ios", PlatformKind::iOS)
+      .Case("tvos", PlatformKind::tvOS)
+      .Case("watchos", PlatformKind::watchOS)
+      .Case("bridgeos", PlatformKind::macOS)
+      .Case("ios-macabi", PlatformKind::macCatalyst)
+      .Case("ios-simulator", PlatformKind::iOSSimulator)
+      .Case("tvos-simulator", PlatformKind::tvOSSimulator)
+      .Case("watchos-simulator", PlatformKind::watchOSSimulator)
+      .Case("driverkit", PlatformKind::driverKit)
+      .Default(PlatformKind::unknown);
+}
+
 } // end namespace MachO.
 } // end namespace llvm.
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