[clang] [flang] [Clang][Flang] Enable loop interchange by default at -O3 (PR #216920)

[Madhur Amilkanthwar via cfe-commits]

================
@@ -1945,8 +1945,10 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions 
&Opts, ArgList &Args,
   Opts.UnrollLoops =
       Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
                    (Opts.OptimizationLevel > 1));
+  // Loop interchange is only enabled by default at -O3.
----------------
madhur13490 wrote:

Ok, done.

https://github.com/llvm/llvm-project/pull/216920
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