Loosen a CopyForwarding assert: store instead of deinit. (#32641)
CopyForwarding attempts to enforce "normal" SIL address patterns using
asserts. This isn't a good strategy because it results in strange
crash diagnostics in release builds. Eventually, we should replace
this logic with a SIL address lifetime utility based on OSSA form and
enforced in the verifier.
Loosen one of these restrictions where we assume that a value
initialized with "copy_addr [initialization]" will be properly
destroyed. This assumption is violated when lowering
.int_fma_FPIEEE32, which knows that the type is trivial, so avoids
deinitialization.
The original SIL looks like this:
copy_addr %src to [initialization] %dest : $*Float
%fma = builtin "int_fma_FPIEEE32"(% : $Builtin.FPIEEE32, % : $Builtin.FPIEEE32, % : $Builtin.FPIEEE32) : $Builtin.FPIEEE32
%result = struct $Float (%fma : $Builtin.FPIEEE32)
store %result to %dest : $*Float
Fixes rdar://64671864.
