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stage2: implement @frameAddress

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This commit is contained in:
Veikka Tuominen
2022-02-28 13:34:21 +02:00
committed by Andrew Kelley
parent 2682b41da5
commit 90bce11f62
11 changed files with 75 additions and 7 deletions
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7
src/codegen/c.zig
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@@ -1757,6 +1757,8 @@ fn genBody(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail, OutO
.wrap_errunion_payload => try airWrapErrUnionPay(f, inst),
.wrap_errunion_err => try airWrapErrUnionErr(f, inst),
.errunion_payload_ptr_set => try airErrUnionPayloadPtrSet(f, inst),
.frame_address => try airFrameAddress(f, inst),
// zig fmt: on
};
switch (result_value) {
@@ -3198,6 +3200,11 @@ fn airErrUnionPayloadPtrSet(f: *Function, inst: Air.Inst.Index) !CValue {
return f.fail("TODO: C backend: implement airErrUnionPayloadPtrSet", .{});
}
fn airFrameAddress(f: *Function, inst: Air.Inst.Index) !CValue {
_ = inst;
return f.fail("TODO: C backend: implement airFrameAddress", .{});
}
fn airWrapErrUnionPay(f: *Function, inst: Air.Inst.Index) !CValue {
if (f.liveness.isUnused(inst))
return CValue.none;

12
src/codegen/llvm.zig
View File

@@ -2214,6 +2214,8 @@ pub const FuncGen = struct {
.wrap_errunion_payload => try self.airWrapErrUnionPayload(inst),
.wrap_errunion_err => try self.airWrapErrUnionErr(inst),
.frame_address => try self.airFrameAddress(inst),
.constant => unreachable,
.const_ty => unreachable,
.unreach => self.airUnreach(inst),
@@ -3339,6 +3341,16 @@ pub const FuncGen = struct {
return partial;
}
fn airFrameAddress(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {
if (self.liveness.isUnused(inst)) return null;
const llvm_i32 = try self.dg.llvmType(Type.initTag(.i32));
const llvm_fn = self.getIntrinsic("llvm.frameaddress", &.{llvm_i32});
const ptr_val = self.builder.buildCall(llvm_fn, &[_]*const llvm.Value{llvm_i32.constNull()}, 1, .Fast, .Auto, "");
const llvm_usize = try self.dg.llvmType(Type.usize);
return self.builder.buildPtrToInt(ptr_val, llvm_usize, "");
}
fn airMin(self: *FuncGen, inst: Air.Inst.Index) !?*const llvm.Value {
if (self.liveness.isUnused(inst)) return null;