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[AArch64] AND optimization does not work if there is a freeze between AND and the cmp

backend:AArch64

missed-optimization

Status: Open.

#154387 In llvm/llvm-project;

· AZero13 opened on Aug 19, 2025

Crash on 19.10, 20.0, and trunk

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

regression:19Regression in 19 releaseRegression in 19 release

Status: Open.

Bug

#148325 In llvm/llvm-project;

· AZero13 opened on Jul 12, 2025

Sign function not recognized to intrinsic when the if statements are swapped

llvm:optimizations

Status: Open.

#146178 In llvm/llvm-project;

· AZero13 opened on Jun 27, 2025

LLVM can compile a function differently if there are different paramters even if the demanded bits are the same

llvm:optimizations

Status: Open.

#144282 In llvm/llvm-project;

· AZero13 opened on Jun 15, 2025

Is CMN safe when the subtraction is nsw?

llvm:optimizations

questionA question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!A question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!

Status: Open.

#141822 In llvm/llvm-project;

· AZero13 opened on May 28, 2025

Expanding to an imm is not always the best solution

llvm:codegen

llvm:optimizations

missed-optimization

Status: Open.

#141437 In llvm/llvm-project;

· AZero13 opened on May 26, 2025

ccmp should adjust for cases where it is checking for -32

backend:AArch64

Status: Open.

#140833 In llvm/llvm-project;

· AZero13 opened on May 21, 2025

[AArch64] Inefficient loading of some immediates

backend:AArch64

missed-optimization

Status: Open.

#140787 In llvm/llvm-project;

· AZero13 opened on May 20, 2025

Funnel shift in 64-bit doesn't get matched to an intrinsic

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

llvm:instcombineCovers the InstCombine, InstSimplify and AggressiveInstCombine passesCovers the InstCombine, InstSimplify and AggressiveInstCombine passes

Status: Open.

#138334 In llvm/llvm-project;

· AZero13 opened on May 2, 2025

two-instruction pass actually worsens codegen

llvm:optimizations

Status: Open.

#135829 In llvm/llvm-project;

· AZero13 opened on Apr 15, 2025

Better codegen for overflow checking and extracting that value, and then setting to -1 if it overflows yields better codegen than the much more succinct saturated add instrinsic

backend:X86

missed-optimization

Status: Open.

#117620 In llvm/llvm-project;

· AZero13 opened on Nov 25, 2024

CoreFoundation objects and NSProxy statically known layout

objective-c

questionA question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!A question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!

Status: Open.

#116559 In llvm/llvm-project;

· AZero13 opened on Nov 17, 2024