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Summary:
Because GCC doesn't use $1 for code generation, inline assembly code can use $1 without having to add it to the clobbers list.
LLVM, on the other hand, does not shy away from using $1, and this can cause conflicts with inline assembly which assumes GCC-like code generation.
A solution to this problem is to make Clang automatically clobber $1 for all MIPS inline assembly.
This is not the optimal solution, but it seems like a necessary compromise, for now.
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D6638
llvm-svn: 224428
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