[DxilSimplify] Constant-fold VectorReduce.*#8577
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Add support for constant-evaluating VectorReduce operations on constant operands. This restores optimization pairity between SM 6.8 and SM 6.9. Assisted by Claude Opus 4.8 ../tools/clang/test/DXC/Passes/DxilSimplify/vectorreduce-const-fold.ll
V-FEXrt
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Jun 22, 2026
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Add support for constant-evaluating VectorReduce operations on constant operands. This restores optimization parity between SM 6.8 and SM 6.9.
Fixes #8570
Assisted by Claude Opus 4.8