commit 19d9f4693e7714c99d4a4c6b0f5e3d24ad0030ac
author Artur Gainullin <artur.gainullin@intel.com> Mon Apr 12 21:39:57 2021 -0700
committer Copybara-Service <copybara-worker@google.com> Tue Apr 13 16:55:24 2021 -0700
tree c4d700865c017f72d2e48642ff660a64aec37c0a
parent 34a66dc72e77a836b45b9be4b2b17b89b765dc85

[Driver] Make the findVCToolChainViaEnvironment case-insensitive

PATH usage on Windows is case-insensitive. There could be situations
when toolchain path can't be obtained from PATH because of
case-sensitivity of the findVCToolChainViaEnvironment.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D100361

GitOrigin-RevId: 192c6023e1e2f31284752d17846401158445f42d

lib/Driver/ToolChains/MSVC.cpp

diff --git a/lib/Driver/ToolChains/MSVC.cpp b/lib/Driver/ToolChains/MSVC.cpp
index 877919e..2fddbd6 100644
--- a/lib/Driver/ToolChains/MSVC.cpp
+++ b/lib/Driver/ToolChains/MSVC.cpp
@@ -190,13 +190,15 @@
       if (IsBin) {
         llvm::StringRef ParentPath = llvm::sys::path::parent_path(TestPath);
         llvm::StringRef ParentFilename = llvm::sys::path::filename(ParentPath);
-        if (ParentFilename == "VC") {
+        if (ParentFilename.equals_lower("VC")) {
           Path = std::string(ParentPath);
           VSLayout = MSVCToolChain::ToolsetLayout::OlderVS;
           return true;
         }
-        if (ParentFilename == "x86ret" || ParentFilename == "x86chk"
-          || ParentFilename == "amd64ret" || ParentFilename == "amd64chk") {
+        if (ParentFilename.equals_lower("x86ret") ||
+            ParentFilename.equals_lower("x86chk") ||
+            ParentFilename.equals_lower("amd64ret") ||
+            ParentFilename.equals_lower("amd64chk")) {
           Path = std::string(ParentPath);
           VSLayout = MSVCToolChain::ToolsetLayout::DevDivInternal;
           return true;
@@ -215,7 +217,7 @@
         for (llvm::StringRef Prefix : ExpectedPrefixes) {
           if (It == End)
             goto NotAToolChain;
-          if (!It->startswith(Prefix))
+          if (!It->startswith_lower(Prefix))
             goto NotAToolChain;
           ++It;
         }