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Issues list

Empty basic blocks with unconditional branches aren't eliminated llvm:optimizations missed-optimization
#142242 opened May 30, 2025 by ashivaram23
1
64 bit shifts on 32 bit targets fail to utilize shift range information llvm:codegen llvm:instcombine missed-optimization
#142046 opened May 29, 2025 by tom-rein
2
[InstCombine] SignBitCheck(SignPreservingOp(X)) -> SignBitCheck(X) llvm:instcombine missed-optimization
#141930 opened May 29, 2025 by dtcxzyw
1
@dtcxzyw
1
Bad codegen for reversing bits in bytes without swapping bytes backend:AArch64 backend:ARM backend:RISC-V missed-optimization
#141863 opened May 28, 2025 by tom-rein
6
[InstCombine] Missed optimization for add + and + icmp pattern llvm:instcombine missed-optimization
#141753 opened May 28, 2025 by nikic
Converting loop pointer bump to index increases register pressure llvm:codegen missed-optimization
#141630 opened May 27, 2025 by dzaima
[CodeGen] Poor code size for switch-based tail call dispatch llvm:codesize Code size issues missed-optimization
#141542 opened May 27, 2025 by resistor
1
Missed optimization: (%1 <= ~%0) && (%0 > ~%1) ==> false good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization
#141479 opened May 26, 2025 by GINN-Imp
@bobby-b-song
4
Expanding to an imm is not always the best solution llvm:codegen llvm:optimizations missed-optimization
#141437 opened May 26, 2025 by AZero13
LLVM fails to reduce zext(op(zext)) in some cases llvm:optimizations missed-optimization
#141360 opened May 24, 2025 by AZero13
2
[X86] const << (x&7) doesn't use shlx when BMI2 is available backend:X86 llvm:SelectionDAG SelectionDAGISel as well missed-optimization
#141347 opened May 24, 2025 by dzaima
1
inconsistent copy propagation for aggregates across calls with local alloc llvm:optimizations missed-optimization
#141309 opened May 24, 2025 by pinskia
Not DSEing of stores to aggregates arguments clang:codegen IR generation bugs: mangling, exceptions, etc. missed-optimization
#141200 opened May 23, 2025 by pinskia
6
Missed folding memset(len) to memset(len + 1) of zeros llvm:optimizations missed-optimization
#141160 opened May 22, 2025 by BreadTom
Missed DCE when popcount of multiplication of two integers but arg1 is 1 in icelake-client good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization
#140917 opened May 21, 2025 by BreadTom
@youngbash88
7
[AArch64] Inefficient loading of some immediates backend:AArch64 missed-optimization
#140787 opened May 20, 2025 by AZero13
7
[X86] Poor emulation of cmpss pattern backend:X86 missed-optimization
#140693 opened May 20, 2025 by RKSimon
1
Lost alignment info clang:codegen IR generation bugs: mangling, exceptions, etc. missed-optimization
#140643 opened May 19, 2025 by alexander-shaposhnikov
3
a & ~(a - b) optimizes to a & (~a + b) even though most targets have an ANDN instruction good first issue https://github.com/llvm/llvm-project/contribute llvm:SelectionDAG SelectionDAGISel as well missed-optimization
#140639 opened May 19, 2025 by Validark
1
@simonzgx
5
x86 missing optimization for variable shift left (without avx512) backend:X86 missed-optimization
#140418 opened May 17, 2025 by oscardssmith
2
Add a pass that materializes the alias analysis into metadata llvm:optimizations missed-optimization
#140280 opened May 16, 2025 by krzysz00
Missed constant folding through control flow llvm:instcombine llvm:optimizations missed-optimization
#140025 opened May 15, 2025 by GINN-Imp
@houngkoungting
7
Missed DCE for __builtin_{clzg,ctzg} when bitshift llvm:optimizations missed-optimization
#139944 opened May 14, 2025 by BreadTom
[missed optimization] pushq/popq preamble with -fomit-frame-pointer if __builtin_frame_address is called llvm:optimizations missed-optimization
#139806 opened May 13, 2025 by chrooti
Missed Optimization: max(max(x, c1) << c2, c3) —> max(x << c2, c3) when c3 >= c1 * 2 ^ c2 good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization
#139786 opened May 13, 2025 by Cancelll
1
@Charukesh827
7
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