llvm-6502/test/MC
Lang Hames b96e833817 [X86] Optimize stackmap shadows on X86.
This patch minimizes the number of nops that must be emitted on X86 to satisfy
stackmap shadow constraints.

To minimize the number of nops inserted, the X86AsmPrinter now records the
size of the most recent stackmap's shadow in the StackMapShadowTracker class,
and tracks the number of instruction bytes emitted since the that stackmap
instruction was encountered. Padding is emitted (if it is required at all)
immediately before the next stackmap/patchpoint instruction, or at the end of
the basic block.

This optimization should reduce code-size and improve performance for people
using the llvm stackmap intrinsic on X86.

<rdar://problem/14959522>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213892 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-24 20:40:55 +00:00
..
AArch64 AArch64: remove "arm64_be" support in favour of "aarch64_be". 2014-07-23 12:58:11 +00:00
ARM [ARM] Make the assembler reject unpredictable pre/post-indexed ARM STRH instructions. 2014-07-24 09:55:46 +00:00
AsmParser Let the integrated assembler understand .exitm, PR20426. 2014-07-24 17:08:39 +00:00
COFF
Disassembler
ELF
MachO X86: drop relocations on __eh_frame sections globally. 2014-07-22 15:47:09 +00:00
Markup
Mips [mips] Add MipsOptionRecord abstraction and use it to implement .reginfo/.MIPS.options 2014-07-21 13:30:55 +00:00
PowerPC
Sparc
SystemZ
X86 [X86] Optimize stackmap shadows on X86. 2014-07-24 20:40:55 +00:00