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Add _isFast predicate that is true at Ofast

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We want to support three configurations:

* Debug (-Onone, -O0): user assertions, library precondition checks, runtime
  checks enabled and verbose.

* Release (-O): library precondition checks, runtime checks enabled but succinct
  (trap).

* Fast (-Ofast): all checks off.

The _isFast predicate will allow to write standard library functions to support
this plan. This commit changes fatal() to differentiate between the three modes.

Support for rdar://16477198

Swift SVN r17697
This commit is contained in:
Arnold Schwaighofer
2014-05-08 15:30:29 +00:00
parent f1d020e11a
commit ce0e6698c5
2 changed files with 9 additions and 3 deletions
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9
lib/Frontend/CompilerInvocation.cpp
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@@ -694,6 +694,7 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
}
// Parse the optimization level.
Opts.AssertConfig = SILOptions::Debug;
if (const Arg *A = Args.getLastArg(OPT_O_Group)) {
// The maximum optimization level we currently support.
unsigned MaxLevel = 3;
@@ -707,6 +708,7 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
IRGenOpts.DisableAllRuntimeChecks = true;
// Removal of cond_fail (overflow on binary operations).
Opts.RemoveRuntimeAsserts = true;
Opts.AssertConfig = SILOptions::Fast;
} else if (!StringRef(A->getValue()).size()) {
// -O is an alias to -O3.
IRGenOpts.OptLevel = MaxLevel;
@@ -736,6 +738,8 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
Opts.AssertConfig = SILOptions::Debug;
} else if (Configuration == "Release") {
Opts.AssertConfig = SILOptions::Release;
} else if (Configuration == "Fast") {
Opts.AssertConfig = SILOptions::Fast;
} else {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(Args), A->getValue());
@@ -745,8 +749,9 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
// Disable assertion configuration replacement when we build the standard
// library.
Opts.AssertConfig = SILOptions::DisableReplacement;
} else {
// Set the assert configuration according to the optimization level.
} else if (Opts.AssertConfig == SILOptions::Debug) {
// Set the assert configuration according to the optimization level if it
// has not been set by the "Ofast" flag.
Opts.AssertConfig =
IRGenOpts.OptLevel > 0 ? SILOptions::Release : SILOptions::Debug;
}