https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91248
Bug ID: 91248
Summary: __builtin___clear_cache is a no-op on SPARC
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-*-*
During the review of https://reviews.llvm.org/D64496 (which implements
__clear_cache for SPARC in LLVM's compiler-rt), the reviewer pointed out
that gcc is wrong wrt. its handling of __clear_cache on SPARC: while
sparc32_initialize_trampoline and sparc64_initialize_trampoline emit flush
insns directly, there's also __builtin___clear_cache, which currently is a
no-op
on SPARC: neither does the SPARC backend define CLEAR_INSN_CACHE (so libgcc's
__clear_cache is a no-op) nor is there a clear_cache insn. Am I missing
somethere here?
