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PR Feedback: Don't put SSA-only types in CValues

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This commit is contained in:
Scott McMurray
2021-05-31 10:26:08 -07:00
parent 039a3bafec
commit 3d2869c6ff
2 changed files with 9 additions and 9 deletions
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8
compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs
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@@ -1132,14 +1132,15 @@ pub(crate) fn codegen_intrinsic_call<'tcx>(
let is_eq_value =
if size == Size::ZERO {
// No bytes means they're trivially equal
fx.bcx.ins().bconst(types::B1, true)
fx.bcx.ins().iconst(types::I8, 1)
} else if let Some(clty) = type_by_size(size) {
// Can't use `trusted` for these loads; they could be unaligned.
let mut flags = MemFlags::new();
flags.set_notrap();
let lhs_val = fx.bcx.ins().load(clty, flags, lhs_ref, 0);
let rhs_val = fx.bcx.ins().load(clty, flags, rhs_ref, 0);
fx.bcx.ins().icmp(IntCC::Equal, lhs_val, rhs_val)
let eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_val, rhs_val);
fx.bcx.ins().bint(types::I8, eq)
} else {
// Just call `memcmp` (like slices do in core) when the
// size is too large or it's not a power-of-two.
@@ -1150,7 +1151,8 @@ pub(crate) fn codegen_intrinsic_call<'tcx>(
let returns = vec![AbiParam::new(types::I32)];
let args = &[lhs_ref, rhs_ref, bytes_val];
let cmp = fx.lib_call("memcmp", params, returns, args)[0];
fx.bcx.ins().icmp_imm(IntCC::Equal, cmp, 0)
let eq = fx.bcx.ins().icmp_imm(IntCC::Equal, cmp, 0);
fx.bcx.ins().bint(types::I8, eq)
};
ret.write_cvalue(fx, CValue::by_val(is_eq_value, ret.layout()));
};