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Shengchen Kan 3a503ce663 [X86] Reduce the number of emitted fragments due to branch align 
Summary:
Currently, a BoundaryAlign fragment may be inserted after the branch
that needs to be aligned to truncate the current fragment, this fragment is
unused at most of time. To avoid that, we can insert a new empty Data
fragment instead. Non-relaxable instruction is usually emitted into Data
fragment, so the inserted empty Data fragment will be reused at a high
possibility.

Reviewers: annita.zhang, reames, MaskRay, craig.topper, LuoYuanke, jyknight

Reviewed By: reames, LuoYuanke

Subscribers: llvm-commits, dexonsmith, hiraditya

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D75438
 		2020-03-12 15:37:35 +08:00
..
AArch64 [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
AMDGPU [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
ARM [MC] Allowing the use of $-prefixed integer as asm identifiers 2020-03-06 16:27:51 +00:00
AVR [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
AsmParser [llvm-objdump] --syms: make flags closer to GNU objdump 2020-03-05 09:59:53 -08:00
BPF [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
COFF [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
Disassembler [ARM] Add initial support for Custom Datapath Extension (CDE) 2020-02-17 15:39:16 +00:00
ELF [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
Hexagon [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
Lanai [lit] Delete empty lines at the end of lit.local.cfg NFC 2019-06-17 09:51:07 +00:00
MSP430 [lit] Delete empty lines at the end of lit.local.cfg NFC 2019-06-17 09:51:07 +00:00
MachO [MC] Allowing the use of $-prefixed integer as asm identifiers 2020-03-06 16:27:51 +00:00
Mips [MC] Allowing the use of $-prefixed integer as asm identifiers 2020-03-06 16:27:51 +00:00
PowerPC [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
RISCV [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
Sparc [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
SystemZ [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
WebAssembly [llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` 2020-03-05 18:05:28 -08:00
X86 [X86] Reduce the number of emitted fragments due to branch align 2020-03-12 15:37:35 +08:00