================
@@ -142,6 +142,26 @@ void Flang::addCodegenOptions(const ArgList &Args,
if (shouldLoopVersion(Args))
CmdArgs.push_back("-fversion-loops-for-stride");
+ Arg *aliasAnalysis = Args.getLastArg(options::OPT_falias_analysis,
+ options::OPT_fno_alias_analysis);
+ Arg *optLevel =
+ Args.getLastArg(options::OPT_Ofast, options::OPT_O, options::OPT_O4);
----------------
banach-space wrote:
> But I want there to still be a separate flag available to override this
> default behavior.
That's fine, but then one has to decide whether `-f{no}-alias-analysis`
overrides `-O{n}` or not? I think that "explicit" request from a user should
always take precedence. This leads to (pseudo code):
```
opts.AliasAnalysis = 0;
if (opt level requiring alias analysis)
opts.AliasAnalysis = 1;
// User request takes precedence when it comes to alias analysis.
if (-falias-analysis or -fno-alias-analysis) then
"do whatever the user requested"
```
Separately, could you check what Clang does and make sure that that would be
consistent?
https://github.com/llvm/llvm-project/pull/73111
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