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Avoid iadd for ptr const val with zero offset

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This commit is contained in:
bjorn3 2020-10-12 12:03:18 +02:00
parent cd2fc77b0e
commit 2f2d3b2fd4
1 changed files with 7 additions and 4 deletions
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9
src/constant.rs
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@ -225,10 +225,13 @@ pub(crate) fn trans_const_value<'tcx>(
} }
None => bug!("missing allocation {:?}", ptr.alloc_id), None => bug!("missing allocation {:?}", ptr.alloc_id),
}; };
let val = fx let val = if ptr.offset.bytes() != 0 {
.bcx fx.bcx
.ins() .ins()
.iadd_imm(base_addr, i64::try_from(ptr.offset.bytes()).unwrap()); .iadd_imm(base_addr, i64::try_from(ptr.offset.bytes()).unwrap())
} else {
base_addr
};
return CValue::by_val(val, layout); return CValue::by_val(val, layout);
} }
} }