https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81497
--- Comment #4 from ktkachov at gcc dot gnu.org --- Author: ktkachov Date: Tue Jun 5 09:50:16 2018 New Revision: 261191 URL: https://gcc.gnu.org/viewcvs?rev=261191&root=gcc&view=rev Log: [arm] PR target/81497: Fix arm_acle.h for C++ When trying to compile something with arm_acle.h using G++ we get a number of nasty errors: arm_acle.h:48:49: error: invalid conversion from ‘const void*’ to ‘const int*’ [-fpermissive] return __builtin_arm_ldc (__coproc, __CRd, __p); This is because the intrinsics that are supposed to be void return the "result" of their builtin, which is void. C lets that slide but C++ complains. After fixing that we run into further errors: arm_acle.h:48:46: error: invalid conversion from 'const void*' to 'const int*' [-fpermissive] return __builtin_arm_ldc (__coproc, __CRd, __p); ^~~ Because the pointer arguments in these intrinsics are void pointers but the builtin expects int pointers. So this patch introduces new qualifiers for void pointers and their const-qualified versions and uses that in the specification of these intrinsics. This gives us the opportunity of creating an arm subdirectory in g++.dg and inaugurates it with the first arm-specific C++ tests (in that directory). PR target/81497 * config/arm/arm-builtins.c (arm_type_qualifiers): Add qualifier_void_pointer and qualifier_const_void_pointer. (arm_ldc_qualifiers, arm_stc_qualifiers): Use the above. (arm_init_builtins): Handle the above. * config/arm/arm_acle.h (__arm_cdp, __arm_ldc, __arm_ldcl, __arm_stc, __arm_stcl, __arm_mcr, __arm_cdp2, __arm_ldc2, __arm_ldcl2, __arm_stc2, __arm_stcl2,__arm_mcr2, __arm_mcrr, __arm_mcrr2): Remove return for void intrinsics. * g++.target/arm/arm.exp: New file. * g++.target/arm/pr81497.C: Likewise. Added: trunk/gcc/testsuite/g++.target/arm/ trunk/gcc/testsuite/g++.target/arm/arm.exp trunk/gcc/testsuite/g++.target/arm/pr81497.C Modified: trunk/gcc/ChangeLog trunk/gcc/config/arm/arm-builtins.c trunk/gcc/config/arm/arm_acle.h trunk/gcc/testsuite/ChangeLog