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mach backend: reduce the size of the Inst enum down to 32 bytes;

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This commit is contained in:
Benjamin Bouvier
2020-06-01 16:22:29 +02:00
parent e227608510
commit 67c7a3ed19
6 changed files with 111 additions and 101 deletions
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27
cranelift/codegen/src/isa/aarch64/inst/emit.rs
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@@ -1239,24 +1239,17 @@ impl MachInstEmit for Inst {
&Inst::EpiloguePlaceholder => {
// Noop; this is just a placeholder for epilogues.
}
&Inst::Call {
ref dest,
loc,
opcode,
..
} => {
sink.add_reloc(loc, Reloc::Arm64Call, dest, 0);
&Inst::Call { ref info } => {
sink.add_reloc(info.loc, Reloc::Arm64Call, &info.dest, 0);
sink.put4(enc_jump26(0b100101, 0));
if opcode.is_call() {
sink.add_call_site(loc, opcode);
if info.opcode.is_call() {
sink.add_call_site(info.loc, info.opcode);
}
}
&Inst::CallInd {
rn, loc, opcode, ..
} => {
sink.put4(0b1101011_0001_11111_000000_00000_00000 | (machreg_to_gpr(rn) << 5));
if opcode.is_call() {
sink.add_call_site(loc, opcode);
&Inst::CallInd { ref info } => {
sink.put4(0b1101011_0001_11111_000000_00000_00000 | (machreg_to_gpr(info.rn) << 5));
if info.opcode.is_call() {
sink.add_call_site(info.loc, info.opcode);
}
}
&Inst::CondBr {
@@ -1318,7 +1311,7 @@ impl MachInstEmit for Inst {
ridx,
rtmp1,
rtmp2,
ref targets,
ref info,
..
} => {
// This sequence is *one* instruction in the vcode, and is expanded only here at
@@ -1361,7 +1354,7 @@ impl MachInstEmit for Inst {
inst.emit(sink, flags, state);
// Emit jump table (table of 32-bit offsets).
let jt_off = sink.cur_offset();
for &target in targets.iter() {
for &target in info.targets.iter() {
let word_off = sink.cur_offset();
let off_into_table = word_off - jt_off;
sink.use_label_at_offset(