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Add AIX Calling Convention

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This commit is contained in:
Henry Jiang 2024-10-03 11:37:41 -04:00
parent f7c8928f03
commit 7d27ceb954
1 changed files with 12 additions and 3 deletions
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15
compiler/rustc_target/src/abi/call/powerpc64.rs
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@ -10,6 +10,7 @@ use crate::spec::HasTargetSpec;
enum ABI { enum ABI {
ELFv1, // original ABI used for powerpc64 (big-endian) ELFv1, // original ABI used for powerpc64 (big-endian)
ELFv2, // newer ABI used for powerpc64le and musl (both endians) ELFv2, // newer ABI used for powerpc64le and musl (both endians)
AIX, // used by AIX OS, big-endian only
} }
use ABI::*; use ABI::*;
@ -23,9 +24,9 @@ where
C: HasDataLayout, C: HasDataLayout,
{ {
arg.layout.homogeneous_aggregate(cx).ok().and_then(|ha| ha.unit()).and_then(|unit| { arg.layout.homogeneous_aggregate(cx).ok().and_then(|ha| ha.unit()).and_then(|unit| {
// ELFv1 only passes one-member aggregates transparently. // ELFv1 and AIX only passes one-member aggregates transparently.
// ELFv2 passes up to eight uniquely addressable members. // ELFv2 passes up to eight uniquely addressable members.
if (abi == ELFv1 && arg.layout.size > unit.size) if ((abi == ELFv1 || abi == AIX) && arg.layout.size > unit.size)
|| arg.layout.size > unit.size.checked_mul(8, cx).unwrap() || arg.layout.size > unit.size.checked_mul(8, cx).unwrap()
{ {
return None; return None;
@ -55,8 +56,14 @@ where
return; return;
} }
// See https://github.com/llvm/llvm-project/blob/main/clang/lib/CodeGen/Targets/PPC.cpp.
if !is_ret && abi == AIX {
arg.make_indirect_byval(None);
return;
}
// The ELFv1 ABI doesn't return aggregates in registers // The ELFv1 ABI doesn't return aggregates in registers
if is_ret && abi == ELFv1 { if is_ret && (abi == ELFv1 || abi == AIX) {
arg.make_indirect(); arg.make_indirect();
return; return;
} }
@ -93,6 +100,8 @@ where
{ {
let abi = if cx.target_spec().env == "musl" { let abi = if cx.target_spec().env == "musl" {
ELFv2 ELFv2
} else if cx.target_spec().os == "aix" {
AIX
} else { } else {
match cx.data_layout().endian { match cx.data_layout().endian {
Endian::Big => ELFv1, Endian::Big => ELFv1,