When trying to retrieve 80bit fp values from clang using
getValueAsApproximateDouble we'd eventually hit the ceiling value and
return infinity, an invalid value for a fp literal.
Add some logic to prevent this error and warn the user.
Closes#8602
It turns out that the endianness-detection header delivered with the
softfloat library is extremely brittle and gives wrong results when
targeting FreeBSD (long story short, _BIG_ENDIAN is always defined there
and that breaks the #if defined() chain).
Use our own endianness detection header to work around any potential
problem.
In std.meta.cast when casting to an enum type from an integer type, first
do a C-style cast from the source value to the tag type of the enum.
This ensures that we don't get an error due to the source value not being
representable by the enum.
In transCCast() use std.meta.cast instead of directly emitting the cast
operation since the enum's underlying type may not be known at translation
time due to an MSVC bug, see https://github.com/ziglang/zig/issues/8003Fixes#6011
Taking a detour trough a f64 is dangerous as the softfloat library
doesn't like converting sNaN values.
The error went unnoticed as an exception is raised by the library but
the stage1 compiler doesn't give a damn.
Happy LLVM 12 Release Day.
Please note that the llvm 12 tag does not include the latest commit in
the release/12.x branch, which is in fact a bug fix for a regression
that is causing a failure in Zig's test suite.
Zig master branch is tracking release/12.x, and will be enabling the
test that is fixed by that commit.
This allows `break` statements to be directly translated from the original C.
Add a break statement as the last statement of the while loop to ensure we
don't have an infinite loop if no breaks / returns are hit in the switch.
Fixes#8387
