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[BuildLibCalls] Infer attributes for posix_memalign #218681

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[BuildLibCalls] Infer attributes for posix_memalign #218681

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8 changes: 8 additions & 0 deletions llvm/lib/Transforms/Utils/BuildLibCalls.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -534,6 +534,14 @@ bool llvm::inferNonMandatoryLibFuncAttrs(Function &F,
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyReadsMemory(F, 0);
break;
case LibFunc_posix_memalign:
Changed |= setRetAndArgsNoUndef(F);
Changed |= setDoesNotThrow(F);
Changed |= setWillReturn(F);
Changed |= setOnlyAccessesInaccessibleMemOrArgMem(F);
Changed |= setDoesNotCapture(F, 0);
Changed |= setOnlyWritesMemory(F, 0);
break;
case LibFunc_aligned_alloc:
Changed |= setAlignedAllocParam(F, 0);
Changed |= setAllocSize(F, 1, std::nullopt);
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3 changes: 2 additions & 1 deletion llvm/test/Transforms/InferFunctionAttrs/annotate.ll
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Expand Up @@ -817,7 +817,7 @@ declare void @perror(ptr)
; CHECK: declare noalias noundef ptr @popen(ptr noundef readonly captures(none), ptr noundef readonly captures(none)) [[NOFREE_NOUNWIND]]
declare ptr @popen(ptr, ptr)

; CHECK: declare i32 @posix_memalign(ptr, i64, i64) [[NOFREE]]
; CHECK: declare noundef i32 @posix_memalign(ptr noundef writeonly captures(none), i64 noundef, i64 noundef) [[INACCESSIBLEMEMORARGMEMONLY_NOFREE_NOUNWIND_WILLRETURN:#[0-9]+]]
declare i32 @posix_memalign(ptr, i64, i64)

; CHECK: declare double @pow(double, double) [[ERRNOMEMONLY_NOFREE_NOSYNC_NOUNWIND_WILLRETURN]]
Expand Down Expand Up @@ -1250,6 +1250,7 @@ declare void @memset_pattern16(ptr, ptr, i64)
; CHECK-DAG: attributes [[INACCESSIBLEMEMORARGMEMORERRNOMEMONLY_NOUNWIND_WILLRETURN_ALLOCKIND_REALLOC_ALLOCSIZE1_FAMILY_MALLOC]] = { mustprogress nounwind willreturn allockind("realloc") allocsize(1) memory(argmem: readwrite, inaccessiblemem: readwrite, errnomem: write) "alloc-family"="malloc" }
; CHECK-DAG: attributes [[INACCESSIBLEMEMORARGMEMORERRNOMEMONLY_NOUNWIND_WILLRETURN_ALLOCKIND_REALLOC_ALLOCSIZE12_FAMILY_MALLOC]] = { mustprogress nounwind willreturn allockind("realloc") allocsize(1,2) memory(argmem: readwrite, inaccessiblemem: readwrite, errnomem: write) "alloc-family"="malloc" }
; CHECK-DAG: attributes [[INACCESSIBLEMEMORARGMEMORERRNOMEMONLY_NOFREE_NOUNWIND_WILLRETURN_FAMILY_MALLOC]] = { mustprogress nofree nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite, errnomem: write) "alloc-family"="malloc" }
; CHECK-DAG: attributes [[INACCESSIBLEMEMORARGMEMONLY_NOFREE_NOUNWIND_WILLRETURN]] = { mustprogress nofree nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite) }
; CHECK-DAG: attributes [[NOFREE_COLD_NORETURN_NOUNWIND]] = { cold nofree noreturn nounwind }
; CHECK-DAG: attributes [[NOFREE_COLD_NORETURN]] = { cold nofree noreturn }
; CHECK-DAG: attributes [[COLD_NORETURN]] = { cold noreturn }
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