I am puzzled by this julia> test(flag) = flag ? 1.0 : 1 test (generic function with 2 methods) julia> @code_warntype test(true) Variables #self#::Core.Compiler.Const(test, false) flag::Bool Body::Union{Float64, Int64} 1 ─ goto #4 if not flag 2 ─ return 1.0 3 ─ Core.Compiler.Const(…

[image] pablosanjose: Oh! Why is this? Isn’t true a compile-time constant here? (Still slightly puzzled…) @code_warntype test(true) gets macro expanded to code_warntype(test, Tuple{Bool}) where clearly, all information that the bool was a constant true has been lost.

Question about constant propagation and inference

General Usage

Tamas_Papp June 3, 2019, 1:10pm 4

See eg

1 Like

Topic		Replies	Views
How does constant propagation work? General Usage	5	1519	April 5, 2019
Constant propagation and inference of constructed types Internals & Design question , inference , constant-propagation	14	1306	February 7, 2023
Thoughts around ways of ensuring compile time evaluation / const prop / inference? Internals & Design inference , type , compilation	17	2480	November 10, 2019
Value type dispatch on constants Internals & Design	3	1427	December 16, 2016
Compile-time constants General Usage	6	1538	September 22, 2017

Question about constant propagation and inference

Related topics