diff options
Diffstat (limited to 'clang/lib/Sema/SemaChecking.cpp')
| -rw-r--r-- | clang/lib/Sema/SemaChecking.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp index 1136263..239e3c8 100644 --- a/clang/lib/Sema/SemaChecking.cpp +++ b/clang/lib/Sema/SemaChecking.cpp @@ -1749,6 +1749,13 @@ bool Sema::CheckAArch64BuiltinFunctionCall(unsigned BuiltinID, BuiltinID == AArch64::BI__builtin_arm_wsrp) return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, true); + // Only check the valid encoding range. Any constant in this range would be + // converted to a register of the form S1_2_C3_C4_5. Let the hardware throw + // an exception for incorrect registers. This matches MSVC behavior. + if (BuiltinID == AArch64::BI_ReadStatusReg || + BuiltinID == AArch64::BI_WriteStatusReg) + return SemaBuiltinConstantArgRange(TheCall, 0, 0, 0x7fff); + if (BuiltinID == AArch64::BI__getReg) return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31); |