> Are there targets out there that gcc supports which aren't supported by LLVM? Probably not too many
Plenty in the embedded space. Just compare the GCC backend list at https://gcc.gnu.org/backends.html to what LLVM supports ("only" X86, X86-64, PowerPC, PowerPC-64, ARM, Thumb, SPARC, Alpha, CellSPU, MIPS, MSP430, SystemZ, and XCore).
The embedded space is very diverse, and even if LLVM backend support is good it's still nowhere near GCC. They're pretty niche of course and LLVM does a good job of supporting the mainstream architectures (and even a bit more). Still, if you're in embedded development not being supported by GCC is limiting.
Plenty in the embedded space. Just compare the GCC backend list at https://gcc.gnu.org/backends.html to what LLVM supports ("only" X86, X86-64, PowerPC, PowerPC-64, ARM, Thumb, SPARC, Alpha, CellSPU, MIPS, MSP430, SystemZ, and XCore).
The embedded space is very diverse, and even if LLVM backend support is good it's still nowhere near GCC. They're pretty niche of course and LLVM does a good job of supporting the mainstream architectures (and even a bit more). Still, if you're in embedded development not being supported by GCC is limiting.