[IRGen] Remove unnecessary default params (#63968)

Also adds type layout strings to analyze_code_size.py

Author: drexin

lib/IRGen/GenEnum.h

@@ -459,7 +459,7 @@ class EnumImplStrategy {
   virtual TypeLayoutEntry
   *buildTypeLayoutEntry(IRGenModule &IGM,
                         SILType T,
-                        bool useStructLayouts = false) const = 0;
+                        bool useStructLayouts) const = 0;
 
   virtual bool isSingleRetainablePointer(ResilienceExpansion expansion,
                                          ReferenceCounting *rc) const {

lib/IRGen/IRGenModule.h

@@ -1015,7 +1015,7 @@ class IRGenModule {
                                            CanSILFunctionType funcTy);
 
   const TypeLayoutEntry
-  &getTypeLayoutEntry(SILType T, bool useStructLayouts = false);
+  &getTypeLayoutEntry(SILType T, bool useStructLayouts);
 
   const clang::ASTContext &getClangASTContext() {
     assert(ClangASTContext &&

lib/IRGen/ScalarTypeInfo.h

@@ -254,7 +254,7 @@ class SingleScalarTypeInfoWithTypeLayout
   TypeLayoutEntry *
   buildTypeLayoutEntry(IRGenModule &IGM,
                        SILType T,
-                       bool useStructLayouts = false) const override {
+                       bool useStructLayouts) const override {
     if (!useStructLayouts) {
       return IGM.typeLayoutCache.getOrCreateTypeInfoBasedEntry(*this, T);
     }

lib/IRGen/TypeInfo.h

@@ -325,7 +325,7 @@ class TypeInfo {
   virtual TypeLayoutEntry
   *buildTypeLayoutEntry(IRGenModule &IGM,
                         SILType T,
-                        bool useStructLayouts = false) const = 0;
+                        bool useStructLayouts) const = 0;
 
   /// Allocate a variable of this type on the stack.
   virtual StackAddress allocateStack(IRGenFunction &IGF, SILType T,

utils/analyze_code_size.py

@@ -154,6 +154,7 @@ def __init__(self):
             ['@objc thunk', re.compile(r'@objc')],
             ['@nonobjc thunk', re.compile(r'@nonobjc')],
             ['Value witness', re.compile(r'.*value witness for')],
+            ['Type layout string', re.compile(r'.*type_layout_string')],
             ['Block copy helper', re.compile(r'_block_copy_helper')],
             ['Block destroy helper', re.compile(r'_block_destroy_helper')],
             ['Block literal global', re.compile(r'___block_literal_global')],