A feature in some compilers where unreachable (dead) code is removed from the compiled output for performance and file-size reasons.
Questions tagged [code-elimination]
11 questions
12
votes
2 answers
Java constant expressions and code elimination
As discussed here, javac and other Java compilers may provide code elimination capabilities for if-statements where the condition is a "Constant Expression".
How is this affected if my code uses a constant expression that depends on other constant…
Markus A.
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10
votes
2 answers
Dead code and/or how to generate a cross reference from Haskell source
I've got some unused functionality in my codebase, but it's hard to identify. The code has evolved over the last year as I explore its problem space and possible solutions. What I'm needing to do is find that unused code so I can get rid of it. I'm…
hutch
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- 1
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7
votes
0 answers
Vite and conditional dead code elimination
I use Vite bundler and in my code I have the following function:
function doSomething() {
if (!import.meta.env.VITE_SOMETHING) {
return;
}
console.log("Hello");
}
I would expect that after building my app (npm run build) without defining…
Martin Ždila
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7
votes
4 answers
javac code elimination capabilities
I'm having a hard time finding information about javac's code elimination capabilities:
I read that if you have something like the following, the if-statement will be eliminated:
static final boolean DEBUG = false;
if (DEBUG)…
Markus A.
- 12,349
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- 116
6
votes
5 answers
Is it possible to always eliminate goto's?
While making everthing with goto's is easy (as evidenced by f.ex. IL), I was wondering if it is also possible to eliminate all goto statements with higher level expressions and statements - say - using everything that's supported in Java.
Or if you…
atlaste
- 30,418
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4
votes
1 answer
Is v8 capable of dead code elimination, based on the value of the `const`?
Question for the v8 developers/experts.
Is it correct to assume, that v8 will completely eliminate the dead code, structured like this:
module1.js
export const DEBUG = false
module2.js
import { DEBUG } from './module1.js'
if (DEBUG) {
// dead…
CanonicEpicure
- 444
- 3
- 16
1
vote
1 answer
disable all obvious elimination when compiling with gcc (without changing my source code!)
I want to keep all dead code (or anything that is even obviously can be optimized) when compiling with gcc, but even with -O0, some dead code are still optimized. How can I keep all code without changing my source code? The sample code is as…
Daniel
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1
vote
1 answer
Does the Perl compiler need to be told not to optimize away function calls with ignored return values?
I am writing new Perl 5 module Class::Tiny::ConstrainedAccessor to check type constraints when you touch object attributes, either by setting or by getting a default value. I am writing the unit tests and want to run the accessors for the latter…
cxw
- 16,685
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0
votes
1 answer
How to eliminate data (years) from csv using R
I am working on a CSV document using R Studio. I have data from 2008 to 2018, but I want to eliminate 2008, 2009 and 2018 from the dataframe so see how the results change. I tried the following code but it's not working:
base.final <-…
erundule
- 1
0
votes
1 answer
Google Compiler not assigning empty arrays to variables?
So I am pretty new to using Google Compiler and am running into a few issues. The first is that in my preprocessed code I am setting an empty array to a variable which will be populated later on, but when compiling it removes the variable altogether…
KMcAloon
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0
votes
1 answer
Gauss Elimination Method Assembly MIPS
The program should take into account the following functionality:
The 2D array with the system to solve is passed to the program as an existing variable memory.
- The data is of type double float.
-The program should save the result in another…
AndreLopes
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