Make -funroll-loops turn on loop unrolling in the optimizer instead
of just ignoring it.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110525 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 8f9fa84..aa0c317 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -148,9 +148,12 @@
// SimplifyLibCalls is only derived.
// TimePasses is only derived.
// UnitAtATime is unused.
- // UnrollLoops is only derived.
// Inlining is only derived.
-
+
+ // UnrollLoops is derived, but also accepts an option, no
+ // harm in pushing it back here.
+ if (Opts.UnrollLoops)
+ Res.push_back("-funroll-loops");
if (Opts.DataSections)
Res.push_back("-fdata-sections");
if (Opts.FunctionSections)
@@ -828,7 +831,8 @@
Opts.OptimizeSize = Args.hasArg(OPT_Os);
Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
Args.hasArg(OPT_ffreestanding));
- Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
+ Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
+ (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
Opts.CXAAtExit = !Args.hasArg(OPT_fno_use_cxa_atexit);