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7d8c42b67e
We currently emit up to 15-byte NOPs on all targets (apart from Silvermont), which stalls performance on some targets with decoders that struggle with 2 or 3 more '66' prefixes. This patch flags recent AMD targets (btver1/znver1) to still emit 15-byte NOPs and bdver* targets to emit 11-byte NOPs. All other targets now emit 10-byte NOPs apart from SilverMont CPUs which still emit 7-byte NOPS. Differential Revision: https://reviews.llvm.org/D42616 llvm-svn: 323693
69 lines
3.5 KiB
ArmAsm
69 lines
3.5 KiB
ArmAsm
# RUN: llvm-mc -filetype=obj -arch=x86 -triple=x86_64-pc-linux-gnu -mcpu=pentiumpro %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP10
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu %s -mcpu=pentiumpro | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP10
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=x86_64-apple-darwin10.0 -mcpu=pentiumpro %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP10
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-apple-darwin8 -mcpu=pentiumpro %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP10
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu -mcpu=slm %s | llvm-objdump -d -no-show-raw-insn - | FileCheck --check-prefix=LNOP7 %s
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu -mcpu=silvermont %s | llvm-objdump -d -no-show-raw-insn - | FileCheck --check-prefix=LNOP7 %s
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu -mcpu=lakemont %s | llvm-objdump -d -no-show-raw-insn - | FileCheck --check-prefix=NOP1 %s
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=x86_64-pc-linux-gnu -mcpu=bdver1 %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP11
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu %s -mcpu=bdver1 | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP11
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=x86_64-pc-linux-gnu -mcpu=btver1 %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP15
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu %s -mcpu=btver1 | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP15
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=x86_64-pc-linux-gnu -mcpu=btver2 %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP15
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu %s -mcpu=btver2 | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP15
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=x86_64-pc-linux-gnu -mcpu=znver1 %s | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP15
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# RUN: llvm-mc -filetype=obj -arch=x86 -triple=i686-pc-linux-gnu %s -mcpu=znver1 | llvm-objdump -d -no-show-raw-insn - | FileCheck %s --check-prefix=LNOP15
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# Ensure alignment directives also emit sequences of 10, 11 and 15-byte NOPs on processors
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# capable of using long NOPs.
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inc %eax
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.p2align 5
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inc %eax
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# LNOP15: 0: inc
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# LNOP15-NEXT: 1: nop
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# LNOP15-NEXT: 10: nop
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# LNOP15-NEXT: 1f: nop
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# LNOP15-NEXT: 20: inc
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# LNOP11: 0: inc
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# LNOP11-NEXT: 1: nop
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# LNOP11-NEXT: c: nop
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# LNOP11-NEXT: 17: nop
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# LNOP11-NEXT: 20: inc
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# LNOP10: 0: inc
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# LNOP10-NEXT: 1: nop
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# LNOP10-NEXT: b: nop
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# LNOP10-NEXT: 15: nop
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# LNOP10-NEXT: 1f: nop
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# LNOP10-NEXT: 20: inc
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# On Silvermont we emit only 7 byte NOPs since longer NOPs are not profitable.
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# LNOP7: 0: inc
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# LNOP7-NEXT: 1: nop
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# LNOP7-NEXT: 8: nop
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# LNOP7-NEXT: f: nop
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# LNOP7-NEXT: 16: nop
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# LNOP7-NEXT: 1d: nop
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# LNOP7-NEXT: 20: inc
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# On Lakemont we emit only 1 byte NOPs since longer NOPs are not supported/legal
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# NOP1: 0: inc
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# NOP1-NEXT: 1: nop
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# NOP1-NEXT: 2: nop
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# NOP1-NEXT: 3: nop
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# NOP1-NEXT: 4: nop
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# NOP1-NEXT: 5: nop
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# NOP1-NEXT: 6: nop
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# .......
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# NOP1: 17: nop
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# NOP1-NEXT: 18: nop
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# NOP1-NEXT: 19: nop
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# NOP1-NEXT: 1a: nop
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# NOP1-NEXT: 1b: nop
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# NOP1-NEXT: 1c: nop
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# NOP1-NEXT: 1d: nop
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# NOP1-NEXT: 1e: nop
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# NOP1-NEXT: 1f: nop
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# NOP1-NEXT: 20: inc
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