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stage2 ARM: store all function parameters to stack for unspecified cc

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This commit is contained in:
joachimschmidt557
2022-01-15 15:38:21 +01:00
committed by Andrew Kelley
parent a5c7742ba6
commit e23f7c01ee
1 changed files with 15 additions and 2 deletions
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17
src/arch/arm/CodeGen.zig
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@@ -2524,6 +2524,7 @@ fn airCondBr(self: *Self, inst: Air.Inst.Index) !void {
},
.stack_offset,
.memory,
.stack_argument_offset,
=> blk: {
try self.spillCompareFlagsIfOccupied();
@@ -2953,7 +2954,7 @@ fn br(self: *Self, block: Air.Inst.Index, operand: Air.Inst.Ref) !void {
block_data.mcv = switch (operand_mcv) {
.none, .dead, .unreach => unreachable,
.register, .stack_offset, .memory => operand_mcv,
.immediate => blk: {
.immediate, .stack_argument_offset => blk: {
const new_mcv = try self.allocRegOrMem(block, true);
try self.setRegOrMem(self.air.typeOfIndex(block), new_mcv, operand_mcv);
break :blk new_mcv;
@@ -3911,7 +3912,7 @@ fn resolveCallingConventionValues(self: *Self, fn_ty: Type) !CallMCValues {
result.stack_align = 1;
return result;
},
.Unspecified, .C => {
.C => {
// ARM Procedure Call Standard, Chapter 6.5
var ncrn: usize = 0; // Next Core Register Number
var nsaa: u32 = 0; // Next stacked argument address
@@ -3943,6 +3944,18 @@ fn resolveCallingConventionValues(self: *Self, fn_ty: Type) !CallMCValues {
result.stack_byte_count = nsaa;
result.stack_align = 8;
},
.Unspecified => {
var stack_offset: u32 = 0;
for (param_types) |ty, i| {
stack_offset = std.mem.alignForwardGeneric(u32, stack_offset, ty.abiAlignment(self.target.*));
result.args[i] = .{ .stack_argument_offset = stack_offset };
stack_offset += @intCast(u32, ty.abiSize(self.target.*));
}
result.stack_byte_count = stack_offset;
result.stack_align = 8;
},
else => return self.fail("TODO implement function parameters for {} on arm", .{cc}),
}