diff options
Diffstat (limited to 'compiler/rustc_target/src/asm/avr.rs')
| -rw-r--r-- | compiler/rustc_target/src/asm/avr.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/asm/avr.rs b/compiler/rustc_target/src/asm/avr.rs index 276f376b297..9adcbecdf3c 100644 --- a/compiler/rustc_target/src/asm/avr.rs +++ b/compiler/rustc_target/src/asm/avr.rs @@ -106,6 +106,11 @@ def_regs! { "the stack pointer cannot be used as an operand for inline asm", #error = ["r0", "r1", "r1r0"] => "r0 and r1 are not available due to an issue in LLVM", + // If this changes within LLVM, the compiler might use the registers + // in the future. This must be reflected in the set of clobbered + // registers, else the clobber ABI implementation is *unsound*, as + // this generates invalid code (register is not marked as clobbered + // but may change the register content). } } |