목록전체 글 (141)

Why should I know this?

byval

https://discourse.llvm.org/t/how-does-byval-work/62397/3 How does byval work? Yeah I’m actually looking for the behavior as it is now. I’m not implementing a new backend, I’m trying to see if byval passes it on the stack on all platforms (arm, aarch64, x86_64, i386, etc), so I was wondering if there is a default behavior here discourse.llvm.org
LLVM-STUDY 2023. 11. 7. 18:10
[TODO] MemorySSAAnalysis

(gdb) bt #0 0x00005555562eebc6 in llvm::BatchAAResults::getModRefInfo (this=0x7fffffffb980, I=0x55555ceb46a0, OptLoc=std::optional [no contained value]) at /home/m/llvm-project/llvm/include/llvm/Analysis/AliasAnalysis.h:641 #1 0x000055555657a3de in llvm::MemorySSA::createNewAccess (this=0x55555ce56230, I=0x55555ceb46a0, AAP=0x7fffffffb980, Template=0x0) at /home/m/llvm-project/llvm/lib/Analysis/..
LLVM-STUDY/TODO 2023. 11. 7. 17:36
[TODO] Metadata & Attribute

https://llvm.org/devmtg/2016-11/Slides/Finkel-IntrinsicsMetadataAttributes.pdf
LLVM-STUDY/TODO 2023. 11. 6. 23:47
[TODO] MemorySSA = MSSA

https://llvm.org/docs/MemorySSA.html MemorySSA — LLVM 18.0.0git documentation MemorySSA is an analysis that can be built for any arbitrary function. When it’s built, it does a pass over the function’s IR in order to build up its mapping of MemoryAccesses. You can then query MemorySSA for things like the dominance relation betwee llvm.org
LLVM-STUDY/TODO 2023. 11. 6. 15:59
LLVM middle-end 최적화 관련 주의점(?)

1. 당면한 문제에 `몰입`도 중요하지만 더 큰 구조를 생각하는 것도 중요하다. 제가 경험했던 패치 https://reviews.llvm.org/D153752 ⚙ D153752 [InstSimplify] Fold icmp comparing GEPs with local allocation This revision is now accepted and ready to land. reviews.llvm.org 최근에 살펴본 패치 https://die4taoam.tistory.com/136 [InstSimplify] Fold (a != 0) ? abs(a) : 0 https://github.com/llvm/llvm-project/pull/70305 [InstSimplify] Fold (a != 0) ? abs(a..
LLVM-STUDY/PATCH 2023. 11. 6. 15:41
Memcpyopt crashes with simple IR

이번에 살펴볼 패치는 매우 짧아서 좋은 패치 입니다. 패치의 링크 https://github.com/llvm/llvm-project/issues/71183 Memcpyopt crashes with simple IR · Issue #71183 · llvm/llvm-project target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:10:11:12:13" target triple = "x86_64-unknown-linux-gnu" define void @"julia_#36#f_439"() { top: call v... github.com 최초에 문제가 발생하는 IR 은 다음과 같습니다. def..
LLVM-STUDY/PATCH 2023. 11. 6. 15:37
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