Add not_int intrinsic for for-loop iteration support#107
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maleadt merged 2 commits intoJuliaGPU:mainfrom Mar 17, 2026
Merged
Add not_int intrinsic for for-loop iteration support#107maleadt merged 2 commits intoJuliaGPU:mainfrom
maleadt merged 2 commits intoJuliaGPU:mainfrom
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0xtaruhi
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- Handle Core.Intrinsics.not_int via xori(x, allones) in julia.jl - Enables Julia's standard `for i in 1:n` loops in kernels - Add bitwise NOT (~) codegen test - Add execution tests: for-loop with literal, constant, and dynamic bounds
maleadt
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Test failures are tricky, and related to IR structurizing. Let's reduce the scope to just not_int for now. |
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I've copied the failing tests into maleadt/IRStructurizer.jl#1 (comment) |
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Summary
Julia desugars
for i in 1:nintoCore.Intrinsics.not_intto negate the loop-exit condition. Without handling this intrinsic, any kernel usingforloops hitsIRError("Unhandled Julia intrinsic: not_int").Implementation:
not_int(x)→xori(x, allones)where:xori(x, true)(logical negation)xori(x, -1)(bitwise complement, all bits set)Changes
src/compiler/intrinsics/julia.jlnot_intdispatch +emit_not_int!test/codegen/operations.jl~(bitwise NOT) codegen testtest/execution/basic.jl~execution test + 3for-loop execution testsTests
map(~, tile)bitwise NOT correctnessfor i in Int32(1):n_iters— literal boundfor i in Int32(1):Int32(n_iters)—ct.Constantboundfor j in Int32(1):len— dynamic bound from scalar indexingDepends on