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Revision tags: llvmorg-21-init, llvmorg-19.1.7, llvmorg-19.1.6, llvmorg-19.1.5, llvmorg-19.1.4, llvmorg-19.1.3, llvmorg-19.1.2, llvmorg-19.1.1, llvmorg-19.1.0, llvmorg-19.1.0-rc4, llvmorg-19.1.0-rc3
# 0a62980a 08-Aug-2024 Matt Arsenault <Matthew.Arsenault@amd.com>

AMDGPU: Support VALU add instructions in localstackalloc (#101692)

Pre-enable this optimization before allowing folds of frame
indexes into add instructions. Disables this fold when using
scratch

AMDGPU: Support VALU add instructions in localstackalloc (#101692)

Pre-enable this optimization before allowing folds of frame
indexes into add instructions. Disables this fold when using
scratch instructions for now. I see some code size improvements
with it, but the optimization needs to be smarter about the
uses depending on the register classes.

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