Replace the stack of IRScopes, each with its own IRBuilder, by directly
tampering with the state of a single IRBuilder.
This seems like the most feasible way to account for a breaking change
in LLVM 11, disallowing IRBuilder from being copied.
This may negatively impact performance, as the (final, i.e.,
non-virtual) Expression::is... family is implemented in D and not
available inline in the C++ headers.
* Remove default label in switch which covers all enumeration values.
This fixes the warning "default label in switch which covers all enumeration values". We will already get a warning when _not_ all enumeration values are covered.
This is the last warning left on OSX/Clang, so with this change, we can build with -Werror.
* Fix warning: enumeral and non-enumeral type in conditional expression
* Fix warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size 5
* "fallthrough" is recognized by the compiler warning system
The part needing most attention was ddmd.root.ctfloat, ddmd.target (incl.
gen/target.cpp) and ddmd.builtin. The front-end is now prepared for
elaborate compile-time floating-point types to allow for proper cross-
compilation.
This version still uses the host's `real` type for compile-time reals,
except for MSVC hosts, which still use 64-bit doubles (when compiled with
DMD host compiler too).
Some other changes:
* semantic*() of Statements extracted from statement.d to statementsem.d
* mangle() -> mangleToBuffer()
* Identifier::string -> toChars()
* Token::float80value => floatvalue
* Dsymbol::isAggregateMember() => isMember()
* BoolExp is no more
* ddmd.root.ctfloat: LDC-specific CTFE builtins
Allow asm statement to be tested in a __traits compiles check without
fataling for those targets that don't support dmd style inline asm.
Without this, a compile could exit(1) without any messages.
Fixes compilable/test12979b.d and runnable/testsafe.d on ARM.
