r266212 - AArch64: allow 64-bit access to sysregs.

[Tim Northover via cfe-commits]

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) {