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96ef284da4
when a compile time constant is known. This occurs when implicitly zero extending function arguments from 16 bits to 32 bits. The 8 bit case doesn't need to be handled, as the 8 bit constants are encoded directly, thereby not needing a separate load instruction to form the constant into a register. <rdar://problem/11481151> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158659 91177308-0d34-0410-b5e6-96231b3b80d8