llvm-codegen

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Why does clang emit a 32-bit float ps instruction for the absolute value of a 64-bit double?
user_2977760
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4
1
199
llvm-codegen avx clang x86 assembly
disable use of cmov in clang
user_139904790
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3
0
319
llvm-codegen x86-64 clang llvm assembly
What are code models and how do they affect code generation?
user_103238780
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2
0
31
llvm-codegen rust
Does the C++ standard allow for an uninitialized bool to crash a program?
user_108926910
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555
6
38142
llvm-codegen undefined-behavior abi llvm c++
Why can the Rust compiler not optimize away the Err arm of Box::downcast?
user_31318520
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10
1
479
llvm-codegen compiler-optimization rust assembly optimization
LLVM opt mem2reg has no effect
user_38781360
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13
2
4763
llvm-codegen ssa compiler-optimization clang optimization
What do the optimization levels `-Os` and `-Oz` do in rustc?
user_24088670
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32
3
8794
llvm-codegen rust
Why doesn't the Rust optimizer remove those useless instructions (tested on Godbolt Compiler Explorer)?
user_24088670
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14
1
1662
llvm-codegen rust x86-64 assembly
Why does this code generate much more assembly than equivalent C++/Clang?
user_41316730
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16
4
3416
llvm-codegen rust optimization
Can I force Rust to not optimize a single function?
user_12132270
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14
2
4314
llvm-codegen rust optimization
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