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llvm/bpf: disable llvm builtins for bpf target

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As bpf program has no global section for constant values (especially strings),
so use llvm's builtins (like memcpy, memset, etc) will lead to compilation failure
(something like this: A call to built-in function 'memcpy' is not supported.)

Signed-off-by: Tw <tw19881113@gmail.com>
This commit is contained in:
Tw 2023-03-28 16:26:24 +08:00 • committed by Veikka Tuominen
parent 9c3bea8482
commit 11903436a9
1 changed files with 3 additions and 0 deletions
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3
src/codegen/llvm.zig
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@ -2719,6 +2719,9 @@ pub const DeclGen = struct {
if (comp.bin_file.options.llvm_cpu_features) |s| {
llvm_fn.addFunctionAttr("target-features", s);
}
if (comp.getTarget().cpu.arch.isBpf()) {
llvm_fn.addFunctionAttr("no-builtins", "");
}
}
fn resolveGlobalDecl(dg: *DeclGen, decl_index: Module.Decl.Index) Error!*llvm.Value {