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cranelift: Remove iconst.i128 (#5075)

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* cranelift: Remove iconst.i128

* bugpoint: Report Changed when only one instruction is mutated

* cranelift: Fix egraph bxor rule

* cranelift: Remove some simple_preopt opts for i128
This commit is contained in:
Afonso Bordado
2022-10-24 20:43:28 +01:00
committed by GitHub
parent bfcf6616fe
commit c8791073d6
13 changed files with 246 additions and 184 deletions
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2
cranelift/codegen/src/opts/algebraic.isle
View File

@@ -107,7 +107,7 @@
(subsume x))
;; x ^ x == 0.
(rule (simplify (bxor ty x x))
(rule (simplify (bxor (fits_in_64 ty) x x))
(subsume (iconst ty (imm64 0))))
;; x ^ not(x) == not(x) ^ x == -1.

32
cranelift/codegen/src/simple_preopt.rs
View File

@@ -11,7 +11,7 @@ use crate::flowgraph::ControlFlowGraph;
use crate::ir::{
condcodes::{CondCode, IntCC},
instructions::Opcode,
types::{I32, I64},
types::{I128, I32, I64},
Block, DataFlowGraph, Function, Inst, InstBuilder, InstructionData, Type, Value,
};
use crate::isa::TargetIsa;
@@ -824,27 +824,27 @@ mod simplify {
};
// Replace operations that are no-ops.
match (opcode, imm.into()) {
(Opcode::IaddImm, 0)
| (Opcode::ImulImm, 1)
| (Opcode::SdivImm, 1)
| (Opcode::UdivImm, 1)
| (Opcode::BorImm, 0)
| (Opcode::BandImm, -1)
| (Opcode::BxorImm, 0)
| (Opcode::RotlImm, 0)
| (Opcode::RotrImm, 0)
| (Opcode::IshlImm, 0)
| (Opcode::UshrImm, 0)
| (Opcode::SshrImm, 0) => {
match (opcode, imm.into(), ty) {
(Opcode::IaddImm, 0, _)
| (Opcode::ImulImm, 1, _)
| (Opcode::SdivImm, 1, _)
| (Opcode::UdivImm, 1, _)
| (Opcode::BorImm, 0, _)
| (Opcode::BandImm, -1, _)
| (Opcode::BxorImm, 0, _)
| (Opcode::RotlImm, 0, _)
| (Opcode::RotrImm, 0, _)
| (Opcode::IshlImm, 0, _)
| (Opcode::UshrImm, 0, _)
| (Opcode::SshrImm, 0, _) => {
// Alias the result value with the original argument.
replace_single_result_with_alias(&mut pos.func.dfg, inst, arg);
}
(Opcode::ImulImm, 0) | (Opcode::BandImm, 0) => {
(Opcode::ImulImm, 0, ty) | (Opcode::BandImm, 0, ty) if ty != I128 => {
// Replace by zero.
pos.func.dfg.replace(inst).iconst(ty, 0);
}
(Opcode::BorImm, -1) => {
(Opcode::BorImm, -1, ty) if ty != I128 => {
// Replace by minus one.
pos.func.dfg.replace(inst).iconst(ty, -1);
}