a7fc76a3ab
Stop pessimizing the use of local variables in core by skipping debug info for MIR temporaries in tiny (single-BB) functions. For functions as simple as this -- `Pin::new`, etc -- nobody every actually wants debuginfo for them in the first place. They're more like intrinsics than real functions, and stepping over them is good.
39 lines
894 B
Rust
39 lines
894 B
Rust
//@ revisions: NONE TINY ALL
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//@[NONE] compile-flags: -Zmir_strip_debuginfo=none
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//@[TINY] compile-flags: -Zmir_strip_debuginfo=locals-in-tiny-functions
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//@[ALL] compile-flags: -Zmir_strip_debuginfo=all-locals
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// CHECK: fn tiny_function
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fn tiny_function(end: u32) -> u32 {
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// CHECK: debug end => _1;
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// NONE: debug a =>
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// NONE: debug b =>
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// TINY-NOT: debug a =>
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// TINY-NOT: debug b =>
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// ALL-NOT: debug a =>
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// ALL-NOT: debug b =>
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let a = !end;
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let b = a ^ 1;
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b
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}
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#[inline(never)]
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fn opaque(_: u32) {}
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// CHECK: fn looping_function
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fn looping_function(end: u32) {
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// CHECK: debug end => _1;
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// NONE: debug i =>
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// NONE: debug x =>
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// TINY: debug i =>
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// TINY: debug x =>
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// ALL-NOT: debug i =>
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// ALL-NOT: debug x =>
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let mut i = 0;
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while i < end {
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let x = i ^ 1;
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opaque(x);
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}
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}
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fn main() {}
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