[Tcwg-commits] [llvm] branch master updated (4e1ab5cbfb6 -> 273374717eb)

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from 4e1ab5cbfb6 ValueTracking: Handle canonicalize in CannotBeNegativeZero new 273374717eb AMDGPU: Fold v_lshl_or_b32 with 0 src0

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Summary of changes: lib/Target/AMDGPU/SIFoldOperands.cpp | 13 +++++ test/CodeGen/AMDGPU/constant-fold-imm-immreg.mir | 74 +++++++++++++++++++++++- 2 files changed, 86 insertions(+), 1 deletion(-)