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rust/tests/mir-opt/matches_reduce_branches.match_nested_if.MatchBranchSimplification.diff

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Introduce a temporary for discriminant value in MatchBranchSimplification The optimization introduces additional uses of the discriminant operand, but does not ensure that it is still valid to evaluate it or that it still evaluates to the same value. Evaluate it once at original position, and store the result in a new temporary.
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- // MIR for `match_nested_if` before MatchBranchSimplification
+ // MIR for `match_nested_if` after MatchBranchSimplification
fn match_nested_if() -> bool {
bless mir opt tests
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let mut _0: bool; // return place in scope 0 at $DIR/matches_reduce_branches.rs:+0:25: +0:29
let _1: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+1:9: +1:12
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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let mut _2: (); // in scope 0 at $DIR/matches_reduce_branches.rs:+1:21: +1:23
let mut _3: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
let mut _4: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
let mut _5: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
let mut _6: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
+ let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
+ let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
+ let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
+ let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
Introduce a temporary for discriminant value in MatchBranchSimplification The optimization introduces additional uses of the discriminant operand, but does not ensure that it is still valid to evaluate it or that it still evaluates to the same value. Evaluate it once at original position, and store the result in a new temporary.
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scope 1 {
bless mir opt tests
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debug val => _1; // in scope 1 at $DIR/matches_reduce_branches.rs:+1:9: +1:12
Introduce a temporary for discriminant value in MatchBranchSimplification The optimization introduces additional uses of the discriminant operand, but does not ensure that it is still valid to evaluate it or that it still evaluates to the same value. Evaluate it once at original position, and store the result in a new temporary.
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}
bb0: {
bless mir opt tests
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StorageLive(_1); // scope 0 at $DIR/matches_reduce_branches.rs:+1:9: +1:12
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:+1:21: +1:23
Bless tests.
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_2 = (); // scope 0 at $DIR/matches_reduce_branches.rs:+1:21: +1:23
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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StorageLive(_3); // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
StorageLive(_5); // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
StorageLive(_6); // scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
_6 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
Remove unneeded field from `SwitchTargets`
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- switchInt(move _6) -> [0: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
Make MatchBranchSimplification clean up after itself
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- }
-
- bb1: {
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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- _5 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:+2:31: +2:35
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
Make MatchBranchSimplification clean up after itself
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- }
-
enhance `ConstGoto` mir-opt by moving up `StorageDead` statements
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- bb2: {
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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- _5 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:+2:45: +2:50
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
Make MatchBranchSimplification clean up after itself
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- }
-
enhance `ConstGoto` mir-opt by moving up `StorageDead` statements
2022-04-06 02:17:41 -05:00
- bb3: {
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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+ StorageLive(_7); // scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
+ _7 = move _6; // scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
+ _5 = Ne(_7, const false); // scope 0 at $DIR/matches_reduce_branches.rs:+2:45: +2:50
+ StorageDead(_7); // scope 0 at $DIR/matches_reduce_branches.rs:+2:24: +2:28
StorageDead(_6); // scope 0 at $DIR/matches_reduce_branches.rs:+2:51: +2:52
Remove unneeded field from `SwitchTargets`
2022-12-03 18:03:27 -06:00
- switchInt(move _5) -> [0: bb5, otherwise: bb4]; // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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- }
-
- bb4: {
- _4 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:+2:55: +2:59
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
- }
-
- bb5: {
- _4 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:+2:69: +2:74
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
- }
-
- bb6: {
+ StorageLive(_8); // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
+ _8 = move _5; // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
+ _4 = Ne(_8, const false); // scope 0 at $DIR/matches_reduce_branches.rs:+2:69: +2:74
+ StorageDead(_8); // scope 0 at $DIR/matches_reduce_branches.rs:+2:21: +2:52
StorageDead(_5); // scope 0 at $DIR/matches_reduce_branches.rs:+2:75: +2:76
Remove unneeded field from `SwitchTargets`
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- switchInt(move _4) -> [0: bb8, otherwise: bb7]; // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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- }
-
- bb7: {
- _3 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:+3:13: +3:17
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
- }
-
- bb8: {
- _3 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:+5:13: +5:18
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
- }
-
- bb9: {
Remove unneeded field from `SwitchTargets`
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- switchInt(move _3) -> [0: bb11, otherwise: bb10]; // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
Simplify MIR opt tests This commit removes many cases of MIR opt tests emitting `.diff`s for more than one pass. These tests cannot be `unit-test`s, and so they are easy to break, and they also provide little value due to having excessively strong opinions over *how* a piece of code should be optimized. Where reasonable, we instead add separate test files that only emit the `PreCodegen.after` MIR for code where we want to track what the result of the net result of the optimization pipeline's output is.
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- }
-
- bb10: {
+ StorageLive(_9); // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
+ _9 = move _4; // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
+ _3 = Ne(_9, const false); // scope 0 at $DIR/matches_reduce_branches.rs:+5:13: +5:18
+ StorageDead(_9); // scope 0 at $DIR/matches_reduce_branches.rs:+2:18: +2:76
+ StorageLive(_10); // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
+ _10 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:+6:9: +6:10
StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:+6:9: +6:10
- _1 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:+8:13: +8:17
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:+8:13: +8:17
- }
-
- bb11: {
- StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:+6:9: +6:10
- StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:+6:9: +6:10
- _1 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:+10:14: +10:19
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:+10:14: +10:19
- }
-
- bb12: {
+ _1 = Ne(_10, const false); // scope 0 at $DIR/matches_reduce_branches.rs:+10:14: +10:19
+ StorageDead(_10); // scope 0 at $DIR/matches_reduce_branches.rs:+2:15: +6:10
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:+11:6: +11:7
bless mir opt tests
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_0 = _1; // scope 1 at $DIR/matches_reduce_branches.rs:+12:5: +12:8
StorageDead(_1); // scope 0 at $DIR/matches_reduce_branches.rs:+13:1: +13:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:+13:2: +13:2
Introduce a temporary for discriminant value in MatchBranchSimplification The optimization introduces additional uses of the discriminant operand, but does not ensure that it is still valid to evaluate it or that it still evaluates to the same value. Evaluate it once at original position, and store the result in a new temporary.
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}
}
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