Implements parsing and emitting of .cfi_window_save in MC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191431 91177308-0d34-0410-b5e6-96231b3b80d8
[Sparc] Implements exception handling in SPARC with DwarfCFI.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191432 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r191393 since it caused pr17380.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191438 91177308-0d34-0410-b5e6-96231b3b80d8
[PowerPC] Fix PR17354: Generate nop after local calls for PIC code.

When generating code for shared libraries, even local calls may be
intercepted, so we need a nop after the call for the linker to fix up the
TOC.  Test case adapted from the one provided in PR17354.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191440 91177308-0d34-0410-b5e6-96231b3b80d8
Fix PR 17372: Emitting PLD for stack address for ARM Thumb2

t2PLDi12, t2PLDi8, t2PLDs was omitted in Thumb2InstrInfo.
This patch fixes it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191441 91177308-0d34-0410-b5e6-96231b3b80d8