db5fc10c21
perf.rlo shows that running the `ConstProp` pass results in across-the-board wins regardless of debug or opt complilation mode. As a result, we're turning it on to get the compile time benefits. `ConstProp` doesn't currently intern the memory used by its `Machine` so we can't yet propagate allocations which is why `ConstProp::should_const_prop()` checks if the value being propagated is a scalar or not.
51 lines
1.3 KiB
Rust
51 lines
1.3 KiB
Rust
// revisions: NO-OPT SIZE-OPT SPEED-OPT
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//[NO-OPT] compile-flags: -Copt-level=0 -Ccodegen-units=1
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//[SIZE-OPT] compile-flags: -Copt-level=s -Ccodegen-units=1
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//[SPEED-OPT] compile-flags: -Copt-level=3 -Ccodegen-units=1
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#![feature(optimize_attribute)]
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#![crate_type="rlib"]
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// CHECK-LABEL: define i32 @nothing
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// CHECK-SAME: [[NOTHING_ATTRS:#[0-9]+]]
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// NO-OPT: ret i32 4
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// SIZE-OPT: ret i32 4
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// SPEEC-OPT: ret i32 4
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#[no_mangle]
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pub fn nothing() -> i32 {
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2 + 2
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}
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// CHECK-LABEL: define i32 @size
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// CHECK-SAME: [[SIZE_ATTRS:#[0-9]+]]
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// NO-OPT: ret i32 6
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// SIZE-OPT: ret i32 6
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// SPEED-OPT: ret i32 6
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#[optimize(size)]
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#[no_mangle]
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pub fn size() -> i32 {
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3 + 3
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}
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// CHECK-LABEL: define i32 @speed
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// NO-OPT-SAME: [[NOTHING_ATTRS]]
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// SPEED-OPT-SAME: [[NOTHING_ATTRS]]
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// SIZE-OPT-SAME: [[SPEED_ATTRS:#[0-9]+]]
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// NO-OPT: ret i32 8
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// SIZE-OPT: ret i32 8
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// SPEED-OPT: ret i32 8
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#[optimize(speed)]
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#[no_mangle]
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pub fn speed() -> i32 {
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4 + 4
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}
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// NO-OPT-DAG: attributes [[SIZE_ATTRS]] = {{.*}}minsize{{.*}}optsize{{.*}}
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// SPEED-OPT-DAG: attributes [[SIZE_ATTRS]] = {{.*}}minsize{{.*}}optsize{{.*}}
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// SIZE-OPT-DAG: attributes [[NOTHING_ATTRS]] = {{.*}}optsize{{.*}}
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// SIZE-OPT-DAG: attributes [[SIZE_ATTRS]] = {{.*}}minsize{{.*}}optsize{{.*}}
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// SIZE-OPT: attributes [[SPEED_ATTRS]]
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// SIZE-OPT-NOT: minsize
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// SIZE-OPT-NOT: optsize
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