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Remove overflow checks from ConstProp.

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This commit is contained in:
Camille GILLOT 2023-02-08 20:28:39 +00:00
parent 4bd2ebc58b
commit e34caaf42d
8 changed files with 88 additions and 116 deletions
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26
tests/mir-opt/dataflow-const-prop/inherit_overflow.main.DataflowConstProp.diff
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@ -5,26 +5,34 @@
let mut _0: (); // return place in scope 0 at $DIR/inherit_overflow.rs:+0:11: +0:11
let mut _1: u8; // in scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
let mut _2: u8; // in scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
let mut _3: u8; // in scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
scope 1 {
}
scope 2 (inlined <u8 as Add>::add) { // at $DIR/inherit_overflow.rs:7:13: 7:47
debug self => _1; // in scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
debug other => _2; // in scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
let mut _3: (u8, bool); // in scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
scope 2 (inlined <u8 as Add>::add) { // at $DIR/inherit_overflow.rs:8:13: 8:47
debug self => _2; // in scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
debug other => _3; // in scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
let mut _4: (u8, bool); // in scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
_1 = const u8::MAX; // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
StorageLive(_2); // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
_2 = const 1_u8; // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
_3 = CheckedAdd(const u8::MAX, const 1_u8); // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
assert(!move (_3.1: bool), "attempt to compute `{} + {}`, which would overflow", const u8::MAX, const 1_u8) -> bb1; // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
_2 = const u8::MAX; // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
StorageLive(_3); // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
_3 = const 1_u8; // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
- _4 = CheckedAdd(_2, _3); // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
- assert(!move (_4.1: bool), "attempt to compute `{} + {}`, which would overflow", _2, _3) -> bb1; // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
+ _4 = CheckedAdd(const u8::MAX, const 1_u8); // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
+ assert(!const true, "attempt to compute `{} + {}`, which would overflow", const u8::MAX, const 1_u8) -> bb1; // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
}
bb1: {
- _1 = move (_4.0: u8); // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
+ _1 = const 0_u8; // scope 2 at $SRC_DIR/core/src/ops/arith.rs:LL:COL
StorageDead(_3); // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
StorageDead(_2); // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
StorageDead(_1); // scope 0 at $DIR/inherit_overflow.rs:+3:13: +3:47
StorageDead(_1); // scope 0 at $DIR/inherit_overflow.rs:+3:47: +3:48
_0 = const (); // scope 0 at $DIR/inherit_overflow.rs:+0:11: +4:2
return; // scope 0 at $DIR/inherit_overflow.rs:+4:2: +4:2
}
}