Commit Graph

6 Commits

Author SHA1 Message Date
Stephen Lin f799e3f944 Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion.
This was done with the following sed invocation to catch label lines demarking function boundaries:
    sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll
which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct.

llvm-svn: 186258
2013-07-13 20:38:47 +00:00
Tim Northover 2dbef3452c AArch64: implement large code model access to global variables.
The MOVZ/MOVK instruction sequence may not be the most efficient (a
literal-pool load could be better) but adding that would require
reinstating the ConstantIslands pass.

For now the sequence is correct, and that's enough. Beware, as of
commit GNU ld does not appear to support the relocations needed for
this. Its primary purpose (for now) will be to support JITed code,
since in that case there is no guarantee of where your code will end
up in memory relative to external symbols it references.

llvm-svn: 181117
2013-05-04 16:53:46 +00:00
Tim Northover c3c5c0971d AArch64: be more careful resorting to inefficient addressing for weak vars.
If an otherwise weak var is actually defined in this unit, it can't be
undefined at runtime so we can use normal global variable sequences (ADRP/ADD)
to access it.

llvm-svn: 176259
2013-02-28 14:36:31 +00:00
Tim Northover b9d4fd210b AArch64: don't drop GlobalAddress offset when handling extern_weak decls.
llvm-svn: 176258
2013-02-28 14:36:24 +00:00
Tim Northover 3533ad6bbd AArch64: remove ConstantIsland pass & put literals in separate section.
This implements the review suggestion to simplify the AArch64 backend. If we
later discover that we *really* need the extra complexity of the
ConstantIslands pass for performance reasons it can be resurrected.

llvm-svn: 175258
2013-02-15 09:33:43 +00:00
Tim Northover 228d9d3aa2 Implement external weak (ELF) symbols on AArch64
Weakly defined symbols should evaluate to 0 if they're undefined at
link-time. This is impossible to do with the usual address generation
patterns, so we should use a literal pool entry to materlialise the
address.

llvm-svn: 174518
2013-02-06 16:43:33 +00:00