Author: tnorthover Date: Wed Apr 13 12:08:55 2016 New Revision: 266212 URL: http://llvm.org/viewvc/llvm-project?rev=266212&view=rev Log: AArch64: allow 64-bit access to sysregs.
Although all the registers are actually 32-bits, I think we have to assume the high 32-bits could be RES0 (the ARM ARM is unclear). If so, reading as a 32-bit register can require extra zero extension operations. Modified: cfe/trunk/lib/Sema/SemaChecking.cpp cfe/trunk/test/Sema/aarch64-special-register.c Modified: cfe/trunk/lib/Sema/SemaChecking.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=266212&r1=266211&r2=266212&view=diff ============================================================================== --- cfe/trunk/lib/Sema/SemaChecking.cpp (original) +++ cfe/trunk/lib/Sema/SemaChecking.cpp Wed Apr 13 12:08:55 2016 @@ -1155,7 +1155,7 @@ bool Sema::CheckAArch64BuiltinFunctionCa if (BuiltinID == AArch64::BI__builtin_arm_rsr64 || BuiltinID == AArch64::BI__builtin_arm_wsr64) - return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, false); + return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, true); if (BuiltinID == AArch64::BI__builtin_arm_rsr || BuiltinID == AArch64::BI__builtin_arm_rsrp || Modified: cfe/trunk/test/Sema/aarch64-special-register.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/aarch64-special-register.c?rev=266212&r1=266211&r2=266212&view=diff ============================================================================== --- cfe/trunk/test/Sema/aarch64-special-register.c (original) +++ cfe/trunk/test/Sema/aarch64-special-register.c Wed Apr 13 12:08:55 2016 @@ -13,7 +13,7 @@ void wsrp_1(void *v) { } void wsr64_1(unsigned long v) { - __builtin_arm_wsr64("sysreg", v); //expected-error {{invalid special register for builtin}} + __builtin_arm_wsr64("sysreg", v); } unsigned rsr_1() { @@ -25,7 +25,7 @@ void *rsrp_1() { } unsigned long rsr64_1() { - return __builtin_arm_rsr64("sysreg"); //expected-error {{invalid special register for builtin}} + return __builtin_arm_rsr64("sysreg"); } void wsr_2(unsigned v) { _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits