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f75e5b4d8c
SSE2, however it's possible to disable SSE2, and the subtarget support code thinks that if 64-bit implies SSE2 and SSE2 is disabled then 64-bit should also be disabled. Instead, just mark all the 64-bit subtargets as explicitly supporting SSE2. Also, move the code that makes -march=x86-64 enable 64-bit support by default to only apply when there is no explicit subtarget. If you need to specify a subtarget and you want 64-bit code, you'll need to select a subtarget that supports 64-bit code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63575 91177308-0d34-0410-b5e6-96231b3b80d8
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