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aarch64_init_ls64_builtins_types currently creates an array with type uint64_t[8] and then sets the mode to V8DI. The problem here is if you used that array type before, you would get a mode of BLK. This causes an ICE in some cases, with the C++ front-end with -g, you would get "type variant differs by TYPE_MODE" and in some cases even without -g, "canonical types differ for identical types". The fix is to do build_distinct_type_copy of the array in aarch64_init_ls64_builtins_types before assigning the mode to that copy. We keep the same ls64 structures correct and user provided arrays are not influenced when "arm_neon.h" is included. Build and tested on aarch64-linux-gnu. PR target/124126 gcc/ChangeLog: * config/aarch64/aarch64-builtins.cc (aarch64_init_ls64_builtins_types): Copy the array type before setting the mode. gcc/testsuite/ChangeLog: * g++.target/aarch64/pr124126-1.C: New test. Signed-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>
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