[clang] [flang] [clang][flang] Support -time in both clang and flang (PR #109165)

[Fangrui Song via cfe-commits]

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@@ -0,0 +1,24 @@
+// The -time option prints timing information for the various subcommands in a
+// format similar to that used by gcc. When compiling and linking, this will
+// include the time to call clang-${LLVM_VERSION_MAJOR} and the linker. Since
+// the name of the linker could vary across platforms, and name of the compiler
+// could be something different, just check that whatever is printed to stderr
+// looks like timing information.
+
+// RUN: %clang -time -c -O3 -o /dev/null %s 2>&1 \
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MaskRay wrote:

If the default target is certain niche OSes AIX, z/OS , the output could be very different. While we are comfortable with Linux on many architectures, certain architectures could have strange behaviors (MIPS). So just stick with x86_64-linux

https://github.com/llvm/llvm-project/pull/109165