d1e28e2a7b
This implements the __builtin_cpu_init and __builtin_cpu_supports builtin routines based on the compiler runtime changes in https://github.com/llvm/llvm-project/pull/85790. This is inspired by https://github.com/llvm/llvm-project/pull/85786. Major changes are a) a restriction in scope to only the builtins (which have a much narrower user interface), and the avoidance of false generality. This change deliberately only handles group 0 extensions (which happen to be all defined ones today), and avoids the tblgen changes from that review. I don't have an environment in which I can actually test this, but @BeMg has been kind enough to report that this appears to work as expected. Before this can make it into a release, we need a change such as https://github.com/llvm/llvm-project/pull/99958. The gcc docs claim that cpu_support can be called by "normal" code without calling the cpu_init routine because the init routine will have been called by a high priority constructor. Our current compiler-rt mechanism does not do this.
31 lines
986 B
C
31 lines
986 B
C
// RUN: %clang_cc1 -fsyntax-only -triple arm64-- -DARM -verify %s
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// RUN: %clang_cc1 -fsyntax-only -triple x86_64-- -DX86 -verify %s
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// RUN: %clang_cc1 -fsyntax-only -triple powerpc64-unknown-linux-gnu -DPPC \
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// RUN: -verify %s
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// RUN: %clang_cc1 -fsyntax-only -triple riscv32-unknown-linux-gnu -DRISCV \
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// RUN: -verify %s
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// RUN: %clang_cc1 -fsyntax-only -triple riscv64-unknown-linux-gnu -DRISCV \
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// RUN: -verify %s
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// expected-no-diagnostics
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#if __has_builtin(__builtin_cpu_is)
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# if defined(ARM) || defined(RISCV)
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# error "ARM/RISCV shouldn't have __builtin_cpu_is"
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# endif
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#endif
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#if __has_builtin(__builtin_cpu_init)
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# if defined(ARM) || defined(PPC)
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# error "ARM/PPC shouldn't have __builtin_cpu_init"
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# endif
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#else
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# ifdef RISCV
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# error "RISCV should have __builtin_cpu_init"
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# endif
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#endif
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#if !__has_builtin(__builtin_cpu_supports)
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# if defined(ARM) || defined(X86) || defined(RISCV)
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# error "ARM/X86/RISCV should have __builtin_cpu_supports"
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# endif
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#endif
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