clang-cl: Accept MSVC 2015's `/execution-charset:utf-8` flag.

Also makes -fexec-charset accept utf-8 case-insensitively.
Like https://reviews.llvm.org/D23807, but for execution-charset.
Also replace a few .lower() comparisons with equals_lower().

https://reviews.llvm.org/D23938

llvm-svn: 279866

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 18b22bc2c9f..5852ac1b2e2 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -5835,7 +5835,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   // -finput_charset=UTF-8 is default. Reject others
   if (Arg *inputCharset = Args.getLastArg(options::OPT_finput_charset_EQ)) {
     StringRef value = inputCharset->getValue();
-    if (value.lower() != "utf-8")
+    if (!value.equals_lower("utf-8"))
       D.Diag(diag::err_drv_invalid_value) << inputCharset->getAsString(Args)
                                           << value;
   }
@@ -5843,7 +5843,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   // -fexec_charset=UTF-8 is default. Reject others
   if (Arg *execCharset = Args.getLastArg(options::OPT_fexec_charset_EQ)) {
     StringRef value = execCharset->getValue();
-    if (value != "UTF-8")
+    if (!value.equals_lower("utf-8"))
       D.Diag(diag::err_drv_invalid_value) << execCharset->getAsString(Args)
                                           << value;
   }
@@ -9219,7 +9219,7 @@ void gnutools::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
     // march from being picked in the absence of a cpu flag.
     Arg *A;
     if ((A = Args.getLastArg(options::OPT_mcpu_EQ)) &&
-        StringRef(A->getValue()).lower() == "krait")
+        StringRef(A->getValue()).equals_lower("krait"))
       CmdArgs.push_back("-mcpu=cortex-a15");
     else
       Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);