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of generating this code: mov %EAX, 4 mov DWORD PTR [%ESP], %EAX mov %AX, 123 movsx %EAX, %AX mov DWORD PTR [%ESP + 4], %EAX call Y we now generate: mov DWORD PTR [%ESP], 4 mov DWORD PTR [%ESP + 4], 123 call Y Which hurts the eyes less. :) Considering that register pressure around call sites is already high (with all of the callee clobber registers n stuff), this may help a lot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12028 91177308-0d34-0410-b5e6-96231b3b80d8 |
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