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Type.intAbiAlignment: update for LLVM 18 changes

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This function is intended to match what the backend desires.
No kink shaming.
This commit is contained in:
Andrew Kelley 2024-05-01 18:17:03 -07:00
parent 88ada2121f
commit 7e1cba73fc
1 changed files with 24 additions and 4 deletions
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28
src/type.zig
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@ -1540,10 +1540,30 @@ pub const Type = struct {
}
pub fn intAbiAlignment(bits: u16, target: Target, use_llvm: bool) Alignment {
return Alignment.fromByteUnits(@min(
std.math.ceilPowerOfTwoPromote(u16, @as(u16, @intCast((@as(u17, bits) + 7) / 8))),
maxIntAlignment(target, use_llvm),
));
return switch (target.cpu.arch) {
.x86 => switch (bits) {
0 => .none,
1...8 => .@"1",
9...16 => .@"2",
17...127 => .@"4",
else => .@"16",
},
.x86_64 => switch (bits) {
0 => .none,
1...8 => .@"1",
9...16 => .@"2",
17...32 => .@"4",
33...64 => .@"8",
else => switch (target_util.zigBackend(target, use_llvm)) {
.stage2_x86_64 => .@"8",
else => .@"16",
},
},
else => return Alignment.fromByteUnits(@min(
std.math.ceilPowerOfTwoPromote(u16, @as(u16, @intCast((@as(u17, bits) + 7) / 8))),
maxIntAlignment(target, use_llvm),
)),
};
}
pub fn maxIntAlignment(target: std.Target, use_llvm: bool) u16 {