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323ac85d6a
ARM prologues usually look like:
push {r7, lr}
sub sp, sp, #4
If code size is extremely important, this can be optimised to the single
instruction:
push {r6, r7, lr}
where we don't actually care about the contents of r6, but pushing it subtracts
4 from sp as a side effect.
This should implement such a conversion, predicated on the "minsize" function
attribute (-Oz) since I've yet to find any code it actually makes faster.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194264 91177308-0d34-0410-b5e6-96231b3b80d8
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| Analysis | ||
| AsmParser | ||
| Bitcode | ||
| CodeGen | ||
| DebugInfo | ||
| ExecutionEngine | ||
| IR | ||
| IRReader | ||
| Linker | ||
| LTO | ||
| MC | ||
| Object | ||
| Option | ||
| Support | ||
| TableGen | ||
| Target | ||
| Transforms | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||
| Makefile | ||