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stage2: slice and alignment fixes

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* Fix backend using wrong union field of the slice instruction.
 * LLVM backend properly sets alignment on global variables.
 * Sema: add coercion for *T to *[1]T
 * Sema: pointers to Decls with explicit alignment now have alignment
   metadata in them.
This commit is contained in:
Andrew Kelley
2021-10-22 17:12:12 -07:00
parent b24e9b6347
commit 01c1f41520
11 changed files with 370 additions and 337 deletions
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3
src/codegen.zig
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@@ -1246,7 +1246,8 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
}
fn airSlice(self: *Self, inst: Air.Inst.Index) !void {
const bin_op = self.air.instructions.items(.data)[inst].bin_op;
const ty_pl = self.air.instructions.items(.data)[inst].ty_pl;
const bin_op = self.air.extraData(Air.Bin, ty_pl.payload).data;
const result: MCValue = if (self.liveness.isUnused(inst)) .dead else switch (arch) {
else => return self.fail("TODO implement slice for {}", .{self.target.cpu.arch}),
};