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C backend: less branching

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This commit is contained in:
Andrew Kelley 2025-04-27 12:20:32 -07:00
parent 7bd3207921
commit 8be4511061
1 changed files with 3 additions and 15 deletions
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18
src/codegen/c.zig
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@ -3348,8 +3348,8 @@ fn genBodyInner(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail,
.atomic_load => try airAtomicLoad(f, inst),
.memset => try airMemset(f, inst, false),
.memset_safe => try airMemset(f, inst, true),
.memcpy => try airMemcpy(f, inst),
.memmove => try airMemmove(f, inst),
.memcpy => try airMemcpy(f, inst, "memcpy("),
.memmove => try airMemcpy(f, inst, "memmove("),
.set_union_tag => try airSetUnionTag(f, inst),
.get_union_tag => try airGetUnionTag(f, inst),
.clz => try airUnBuiltinCall(f, inst, air_datas[@intFromEnum(inst)].ty_op.operand, "clz", .bits),
@ -6976,15 +6976,7 @@ fn airMemset(f: *Function, inst: Air.Inst.Index, safety: bool) !CValue {
return .none;
}
fn airMemcpy(f: *Function, inst: Air.Inst.Index) !CValue {
return copyOp(f, inst, .memcpy);
}
fn airMemmove(f: *Function, inst: Air.Inst.Index) !CValue {
return copyOp(f, inst, .memmove);
}
fn copyOp(f: *Function, inst: Air.Inst.Index, op: enum { memcpy, memmove }) !CValue {
fn airMemcpy(f: *Function, inst: Air.Inst.Index, function_paren: []const u8) !CValue {
const pt = f.object.dg.pt;
const zcu = pt.zcu;
const bin_op = f.air.instructions.items(.data)[@intFromEnum(inst)].bin_op;
@ -6999,10 +6991,6 @@ fn copyOp(f: *Function, inst: Air.Inst.Index, op: enum { memcpy, memmove }) !CVa
try writeArrayLen(f, writer, dest_ptr, dest_ty);
try writer.writeAll(" != 0) ");
}
const function_paren = switch (op) {
.memcpy => "memcpy(",
.memmove => "memmove(",
};
try writer.writeAll(function_paren);
try writeSliceOrPtr(f, writer, dest_ptr, dest_ty);
try writer.writeAll(", ");