default to -march=x86-64 on 64-bit hosts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63579
91177308-0d34-0410-b5e6-
96231b3b80d8
; RUN: llvm-as < %s | llc -march=x86 | grep btl | count 28
-; RUN: llvm-as < %s | llc -mcpu=pentium4 | grep btl | not grep esp
-; RUN: llvm-as < %s | llc -mcpu=penryn | grep btl | not grep esp
+; RUN: llvm-as < %s | llc -march=x86 -mcpu=pentium4 | grep btl | not grep esp
+; RUN: llvm-as < %s | llc -march=x86 -mcpu=penryn | grep btl | not grep esp
; PR3253
; The register+memory form of the BT instruction should be usable on