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LLVM backend: no more signext on aarch64

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Clang doesn't do it, so Zig must not do it in order to match the C ABI.
This commit is contained in:
Andrew Kelley 2024-05-01 16:23:47 -07:00
parent 6986d2aca9
commit 6730b366a0
1 changed files with 20 additions and 17 deletions
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37
src/codegen/llvm.zig
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@ -11563,28 +11563,31 @@ fn ccAbiPromoteInt(
.Int, .Enum, .ErrorSet => ty.intInfo(mod),
else => return null,
};
if (int_info.bits <= 16) return int_info.signedness;
switch (target.cpu.arch) {
.riscv64 => {
if (int_info.bits == 32) {
// LLVM always signextends 32 bit ints, unsure if bug.
return .signed;
}
if (int_info.bits < 64) {
return int_info.signedness;
}
return switch (target.cpu.arch) {
.riscv64 => switch (int_info.bits) {
0...16 => int_info.signedness,
32 => .signed, // LLVM always signextends 32 bit ints, unsure if bug.
17...31, 33...63 => int_info.signedness,
else => null,
},
.sparc64,
.powerpc64,
.powerpc64le,
=> {
if (int_info.bits < 64) {
return int_info.signedness;
}
=> switch (int_info.bits) {
0...63 => int_info.signedness,
else => null,
},
else => {},
}
return null;
.aarch64,
.aarch64_be,
=> null,
else => switch (int_info.bits) {
0...16 => int_info.signedness,
else => null,
},
};
}
/// This is the one source of truth for whether a type is passed around as an LLVM pointer,