Merge pull request #11357 from aschwaighofer/frontend_default_to_onone_optimization

CompilerInvocation: If no optimization flag is set default to Onone

Author: aschwaighofer

lib/Frontend/CompilerInvocation.cpp

@@ -1378,10 +1378,12 @@ static bool ParseSILArgs(SILOptions &Opts, ArgList &Args,
     Args.hasArg(OPT_sil_serialize_witness_tables);
 
   // Parse the optimization level.
+  // Default to Onone settings if no option is passed.
+  IRGenOpts.Optimize = false;
+  Opts.Optimization = SILOptions::SILOptMode::None;
   if (const Arg *A = Args.getLastArg(OPT_O_Group)) {
     if (A->getOption().matches(OPT_Onone)) {
-      IRGenOpts.Optimize = false;
-      Opts.Optimization = SILOptions::SILOptMode::None;
+      // Already set.
     } else if (A->getOption().matches(OPT_Ounchecked)) {
       // Turn on optimizations and remove all runtime checks.
       IRGenOpts.Optimize = true;

test/DebugInfo/dbgvalue-insertpt.swift

@@ -5,6 +5,7 @@ for i in 0 ..< 3 {
   // CHECK: %i.addr = alloca i{{32|64}}
   // CHECK-NEXT: call void @llvm.dbg.declare(metadata i{{32|64}}* %i.addr,
   // CHECK-SAME:                           metadata ![[I:[0-9]+]],
+  // CHECK: bitcast %TSiSg* %[[ALLOCA]] to i{{32|64}}*
   // CHECK: %[[CAST:[0-9]+]] = bitcast %TSiSg* %[[ALLOCA]] to i{{32|64}}*
   // CHECK: %[[LD:[0-9]+]] = load i{{32|64}}, i{{32|64}}* %[[CAST]]
   // CHECK: br i1 {{%.*}}, label %[[FAIL:.*]], label %[[SUCCESS:.*]],

test/IDE/Inputs/foo_swift_module.printed.comments.txt

@@ -1,3 +1,4 @@
+import SwiftOnoneSupport
 
 precedencegroup High {
   associativity: left

test/IRGen/big_types_corner_cases.swift

@@ -144,7 +144,7 @@ public func enumCallee(_ x: LargeEnum) {
 // CHECK-64: alloca %T22big_types_corner_cases9LargeEnumO
 // CHECK-64: call void @llvm.memcpy.p0i8.p0i8.i64
 // CHECK-64: call void @llvm.memcpy.p0i8.p0i8.i64
-// CHECK-64: call %swift.type* @_T0ypMa()
+// CHECK-64: _T0s5printySayypGd_SS9separatorSS10terminatortF
 // CHECK-64: ret void
 
 // CHECK-LABEL: define{{( protected)?}} internal swiftcc void @_T022big_types_corner_cases8SuperSubC1fyyFAA9BigStructVycfU_(%T22big_types_corner_cases9BigStructV* noalias nocapture sret, %T22big_types_corner_cases8SuperSubC*) #0 {