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LLVM: add target-cpu and target-features fn attributes

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This commit is contained in:
Andrew Kelley 2022-05-31 22:13:24 -07:00
parent 2f9533f639
commit 8c0f4e6f54
2 changed files with 17 additions and 7 deletions
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21
src/codegen/llvm.zig
View File

@ -2302,19 +2302,21 @@ pub const DeclGen = struct {
}
fn addCommonFnAttributes(dg: *DeclGen, llvm_fn: *const llvm.Value) void {
if (!dg.module.comp.bin_file.options.red_zone) {
const comp = dg.module.comp;
if (!comp.bin_file.options.red_zone) {
dg.addFnAttr(llvm_fn, "noredzone");
}
if (dg.module.comp.bin_file.options.omit_frame_pointer) {
if (comp.bin_file.options.omit_frame_pointer) {
dg.addFnAttrString(llvm_fn, "frame-pointer", "none");
} else {
dg.addFnAttrString(llvm_fn, "frame-pointer", "all");
}
dg.addFnAttr(llvm_fn, "nounwind");
if (dg.module.comp.unwind_tables) {
if (comp.unwind_tables) {
dg.addFnAttr(llvm_fn, "uwtable");
}
if (dg.module.comp.bin_file.options.skip_linker_dependencies) {
if (comp.bin_file.options.skip_linker_dependencies) {
// The intent here is for compiler-rt and libc functions to not generate
// infinite recursion. For example, if we are compiling the memcpy function,
// and llvm detects that the body is equivalent to memcpy, it may replace the
@ -2322,14 +2324,19 @@ pub const DeclGen = struct {
// overflow instead of performing memcpy.
dg.addFnAttr(llvm_fn, "nobuiltin");
}
if (dg.module.comp.bin_file.options.optimize_mode == .ReleaseSmall) {
if (comp.bin_file.options.optimize_mode == .ReleaseSmall) {
dg.addFnAttr(llvm_fn, "minsize");
dg.addFnAttr(llvm_fn, "optsize");
}
if (dg.module.comp.bin_file.options.tsan) {
if (comp.bin_file.options.tsan) {
dg.addFnAttr(llvm_fn, "sanitize_thread");
}
// TODO add target-cpu and target-features fn attributes
if (comp.getTarget().cpu.model.llvm_name) |s| {
llvm_fn.addFunctionAttr("target-cpu", s);
}
if (comp.bin_file.options.llvm_cpu_features) |s| {
llvm_fn.addFunctionAttr("target-features", s);
}
}
fn resolveGlobalDecl(dg: *DeclGen, decl_index: Module.Decl.Index) Error!*const llvm.Value {

3
src/codegen/llvm/bindings.zig
View File

@ -239,6 +239,9 @@ pub const Value = opaque {
pub const getAlignment = LLVMGetAlignment;
extern fn LLVMGetAlignment(V: *const Value) c_uint;
pub const addFunctionAttr = ZigLLVMAddFunctionAttr;
extern fn ZigLLVMAddFunctionAttr(Fn: *const Value, attr_name: [*:0]const u8, attr_value: [*:0]const u8) void;
};
pub const Type = opaque {