[PATCH] [InstCombine] Properly combine metadata when replacing a load with another

[Björn Steinbrink]

Not doing this can lead to misoptimizations down the line, e.g. because
of range metadata on the replacing load excluding values that are valid
for the load that is being replaced.
---
 .../InstCombine/InstCombineLoadStoreAlloca.cpp        | 12 +++++++++++-
 test/Transforms/InstCombine/load-range-metadata.ll    | 19 +++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 test/Transforms/InstCombine/load-range-metadata.ll

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