527c629cd9
After coverage instrumentation and MIR transformations, we can sometimes end up with coverage expressions that always have a value of zero. Any expression operand that refers to an always-zero expression can be replaced with a literal `Operand::Zero`, making the emitted coverage mapping data smaller and simpler. This simplification step is mostly redundant with the simplifications performed inline in `expressions_with_regions`, except that it does a slightly more thorough job in some cases (because it checks for always-zero expressions *after* other simplifications). However, adding this simplification step will then let us greatly simplify that code, without affecting the quality of the emitted coverage maps.
186 lines
12 KiB
Plaintext
186 lines
12 KiB
Plaintext
Function name: <loops_branches::DebugTest as core::fmt::Debug>::fmt
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Raw bytes (251): 0x[01, 01, 32, 05, 09, 00, 02, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, c3, 01, c7, 01, 0d, 00, 11, 15, ba, 01, 00, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, 00, b2, 01, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, af, 01, 11, 00, b2, 01, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, 25, a7, 01, aa, 01, 19, af, 01, 11, 00, b2, 01, b6, 01, 1d, ba, 01, 15, bf, 01, 19, c3, 01, c7, 01, 0d, 00, 11, 15, 14, 01, 09, 05, 01, 10, 05, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 02, 01, 0e, 00, 0f, 07, 01, 0d, 00, 1e, 25, 00, 1e, 00, 1f, 00, 01, 10, 01, 0a, ba, 01, 03, 0d, 00, 0e, bf, 01, 00, 12, 00, 17, 27, 01, 10, 00, 14, b6, 01, 01, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, b2, 01, 01, 12, 00, 13, af, 01, 01, 11, 00, 22, aa, 01, 00, 22, 00, 23, 00, 01, 14, 01, 0e, 19, 03, 09, 00, 0f, a3, 01, 01, 05, 00, 06]
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Number of files: 1
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- file 0 => global file 1
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Number of expressions: 50
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- expression 0 operands: lhs = Counter(1), rhs = Counter(2)
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- expression 1 operands: lhs = Zero, rhs = Expression(0, Sub)
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- expression 2 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 3 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 4 operands: lhs = Counter(3), rhs = Zero
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- expression 5 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 6 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 7 operands: lhs = Counter(3), rhs = Zero
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- expression 8 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 9 operands: lhs = Expression(46, Sub), rhs = Zero
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- expression 10 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 11 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 12 operands: lhs = Counter(3), rhs = Zero
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- expression 13 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 14 operands: lhs = Expression(46, Sub), rhs = Counter(5)
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- expression 15 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 16 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 17 operands: lhs = Counter(3), rhs = Zero
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- expression 18 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 19 operands: lhs = Expression(45, Sub), rhs = Counter(7)
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- expression 20 operands: lhs = Expression(46, Sub), rhs = Counter(5)
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- expression 21 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 22 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 23 operands: lhs = Counter(3), rhs = Zero
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- expression 24 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 25 operands: lhs = Zero, rhs = Expression(44, Sub)
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- expression 26 operands: lhs = Expression(45, Sub), rhs = Counter(7)
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- expression 27 operands: lhs = Expression(46, Sub), rhs = Counter(5)
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- expression 28 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 29 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 30 operands: lhs = Counter(3), rhs = Zero
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- expression 31 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 32 operands: lhs = Expression(43, Add), rhs = Counter(4)
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- expression 33 operands: lhs = Zero, rhs = Expression(44, Sub)
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- expression 34 operands: lhs = Expression(45, Sub), rhs = Counter(7)
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- expression 35 operands: lhs = Expression(46, Sub), rhs = Counter(5)
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- expression 36 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 37 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 38 operands: lhs = Counter(3), rhs = Zero
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- expression 39 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 40 operands: lhs = Counter(9), rhs = Expression(41, Add)
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- expression 41 operands: lhs = Expression(42, Sub), rhs = Counter(6)
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- expression 42 operands: lhs = Expression(43, Add), rhs = Counter(4)
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- expression 43 operands: lhs = Zero, rhs = Expression(44, Sub)
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- expression 44 operands: lhs = Expression(45, Sub), rhs = Counter(7)
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- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(5)
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- expression 46 operands: lhs = Expression(47, Add), rhs = Counter(6)
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- expression 47 operands: lhs = Expression(48, Add), rhs = Expression(49, Add)
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- expression 48 operands: lhs = Counter(3), rhs = Zero
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- expression 49 operands: lhs = Counter(4), rhs = Counter(5)
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Number of file 0 mappings: 20
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- Code(Counter(0)) at (prev + 9, 5) to (start + 1, 16)
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- Code(Counter(1)) at (prev + 2, 16) to (start + 0, 21)
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- Code(Zero) at (prev + 1, 23) to (start + 0, 27)
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- Code(Zero) at (prev + 0, 28) to (start + 0, 30)
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- Code(Expression(0, Sub)) at (prev + 1, 14) to (start + 0, 15)
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= (c1 - c2)
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- Code(Expression(1, Add)) at (prev + 1, 13) to (start + 0, 30)
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= (Zero + (c1 - c2))
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- Code(Counter(9)) at (prev + 0, 30) to (start + 0, 31)
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- Code(Zero) at (prev + 1, 16) to (start + 1, 10)
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- Code(Expression(46, Sub)) at (prev + 3, 13) to (start + 0, 14)
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= (((c3 + Zero) + (c4 + c5)) - c6)
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- Code(Expression(47, Add)) at (prev + 0, 18) to (start + 0, 23)
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= ((c3 + Zero) + (c4 + c5))
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- Code(Expression(9, Add)) at (prev + 1, 16) to (start + 0, 20)
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= ((((c3 + Zero) + (c4 + c5)) - c6) + Zero)
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- Code(Expression(45, Sub)) at (prev + 1, 20) to (start + 0, 25)
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= ((((c3 + Zero) + (c4 + c5)) - c6) - c5)
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- Code(Zero) at (prev + 1, 27) to (start + 0, 31)
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- Code(Zero) at (prev + 0, 32) to (start + 0, 34)
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- Code(Expression(44, Sub)) at (prev + 1, 18) to (start + 0, 19)
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= (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7)
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- Code(Expression(43, Add)) at (prev + 1, 17) to (start + 0, 34)
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= (Zero + (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7))
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- Code(Expression(42, Sub)) at (prev + 0, 34) to (start + 0, 35)
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= ((Zero + (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7)) - c4)
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- Code(Zero) at (prev + 1, 20) to (start + 1, 14)
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- Code(Counter(6)) at (prev + 3, 9) to (start + 0, 15)
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- Code(Expression(40, Add)) at (prev + 1, 5) to (start + 0, 6)
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= (c9 + (((Zero + (((((c3 + Zero) + (c4 + c5)) - c6) - c5) - c7)) - c4) + c6))
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Function name: <loops_branches::DisplayTest as core::fmt::Display>::fmt
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Raw bytes (255): 0x[01, 01, 34, 01, 05, 02, 09, 00, 0e, 02, 09, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, c7, 01, cb, 01, 05, 0d, 11, 15, be, 01, 00, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, 00, b6, 01, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, b3, 01, 15, 00, b6, 01, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, ae, 01, cf, 01, b3, 01, 15, 00, b6, 01, ba, 01, 1d, be, 01, 11, c3, 01, 19, c7, 01, cb, 01, 05, 0d, 11, 15, 19, 25, 14, 01, 22, 05, 01, 11, 00, 01, 12, 01, 0a, 02, 02, 10, 00, 15, 00, 01, 17, 00, 1b, 00, 00, 1c, 00, 1e, 0e, 01, 0e, 00, 0f, 0b, 01, 0d, 00, 1e, 25, 00, 1e, 00, 1f, be, 01, 02, 0d, 00, 0e, c3, 01, 00, 12, 00, 17, 2f, 01, 10, 00, 15, 00, 00, 16, 01, 0e, ba, 01, 02, 14, 00, 19, 00, 01, 1b, 00, 1f, 00, 00, 20, 00, 22, b6, 01, 01, 12, 00, 13, b3, 01, 01, 11, 00, 22, ae, 01, 00, 22, 00, 23, 19, 03, 09, 00, 0f, ab, 01, 01, 05, 00, 06]
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Number of files: 1
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- file 0 => global file 1
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Number of expressions: 52
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- expression 0 operands: lhs = Counter(0), rhs = Counter(1)
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- expression 1 operands: lhs = Expression(0, Sub), rhs = Counter(2)
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- expression 2 operands: lhs = Zero, rhs = Expression(3, Sub)
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- expression 3 operands: lhs = Expression(0, Sub), rhs = Counter(2)
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- expression 4 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 5 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 6 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 7 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 8 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 9 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 10 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 11 operands: lhs = Expression(47, Sub), rhs = Zero
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- expression 12 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 13 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 14 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 15 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 16 operands: lhs = Expression(47, Sub), rhs = Counter(4)
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- expression 17 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 18 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 19 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 20 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 21 operands: lhs = Expression(46, Sub), rhs = Counter(7)
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- expression 22 operands: lhs = Expression(47, Sub), rhs = Counter(4)
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- expression 23 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 24 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 25 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 26 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 27 operands: lhs = Zero, rhs = Expression(45, Sub)
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- expression 28 operands: lhs = Expression(46, Sub), rhs = Counter(7)
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- expression 29 operands: lhs = Expression(47, Sub), rhs = Counter(4)
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- expression 30 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 31 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 32 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 33 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 34 operands: lhs = Expression(44, Add), rhs = Counter(5)
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- expression 35 operands: lhs = Zero, rhs = Expression(45, Sub)
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- expression 36 operands: lhs = Expression(46, Sub), rhs = Counter(7)
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- expression 37 operands: lhs = Expression(47, Sub), rhs = Counter(4)
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- expression 38 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 39 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 40 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 41 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 42 operands: lhs = Expression(43, Sub), rhs = Expression(51, Add)
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- expression 43 operands: lhs = Expression(44, Add), rhs = Counter(5)
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- expression 44 operands: lhs = Zero, rhs = Expression(45, Sub)
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- expression 45 operands: lhs = Expression(46, Sub), rhs = Counter(7)
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- expression 46 operands: lhs = Expression(47, Sub), rhs = Counter(4)
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- expression 47 operands: lhs = Expression(48, Add), rhs = Counter(6)
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- expression 48 operands: lhs = Expression(49, Add), rhs = Expression(50, Add)
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- expression 49 operands: lhs = Counter(1), rhs = Counter(3)
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- expression 50 operands: lhs = Counter(4), rhs = Counter(5)
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- expression 51 operands: lhs = Counter(6), rhs = Counter(9)
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Number of file 0 mappings: 20
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- Code(Counter(0)) at (prev + 34, 5) to (start + 1, 17)
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- Code(Zero) at (prev + 1, 18) to (start + 1, 10)
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- Code(Expression(0, Sub)) at (prev + 2, 16) to (start + 0, 21)
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= (c0 - c1)
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- Code(Zero) at (prev + 1, 23) to (start + 0, 27)
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- Code(Zero) at (prev + 0, 28) to (start + 0, 30)
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- Code(Expression(3, Sub)) at (prev + 1, 14) to (start + 0, 15)
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= ((c0 - c1) - c2)
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- Code(Expression(2, Add)) at (prev + 1, 13) to (start + 0, 30)
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= (Zero + ((c0 - c1) - c2))
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- Code(Counter(9)) at (prev + 0, 30) to (start + 0, 31)
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- Code(Expression(47, Sub)) at (prev + 2, 13) to (start + 0, 14)
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= (((c1 + c3) + (c4 + c5)) - c6)
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- Code(Expression(48, Add)) at (prev + 0, 18) to (start + 0, 23)
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= ((c1 + c3) + (c4 + c5))
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- Code(Expression(11, Add)) at (prev + 1, 16) to (start + 0, 21)
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= ((((c1 + c3) + (c4 + c5)) - c6) + Zero)
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- Code(Zero) at (prev + 0, 22) to (start + 1, 14)
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- Code(Expression(46, Sub)) at (prev + 2, 20) to (start + 0, 25)
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= ((((c1 + c3) + (c4 + c5)) - c6) - c4)
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- Code(Zero) at (prev + 1, 27) to (start + 0, 31)
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- Code(Zero) at (prev + 0, 32) to (start + 0, 34)
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- Code(Expression(45, Sub)) at (prev + 1, 18) to (start + 0, 19)
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= (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7)
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- Code(Expression(44, Add)) at (prev + 1, 17) to (start + 0, 34)
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= (Zero + (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7))
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- Code(Expression(43, Sub)) at (prev + 0, 34) to (start + 0, 35)
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= ((Zero + (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7)) - c5)
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- Code(Counter(6)) at (prev + 3, 9) to (start + 0, 15)
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- Code(Expression(42, Add)) at (prev + 1, 5) to (start + 0, 6)
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= (((Zero + (((((c1 + c3) + (c4 + c5)) - c6) - c4) - c7)) - c5) + (c6 + c9))
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Function name: loops_branches::main
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Raw bytes (9): 0x[01, 01, 00, 01, 01, 37, 01, 05, 02]
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Number of files: 1
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- file 0 => global file 1
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Number of expressions: 0
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Number of file 0 mappings: 1
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- Code(Counter(0)) at (prev + 55, 1) to (start + 5, 2)
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