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https://github.com/c64scene-ar/llvm-6502.git
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054db7df5b
Summary: When instruction bundling is enabled and the -mc-relax-all flag is set, we can write bundle padding directly into fragments and avoid creating large number of fragments significantly reducing LLVM MC memory usage. Test Plan: Regression test attached Reviewers: eliben Subscribers: jfb, mseaborn Differential Revision: http://reviews.llvm.org/D8072 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234714 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
1.3 KiB
ArmAsm
53 lines
1.3 KiB
ArmAsm
# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - \
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# RUN: | llvm-objdump -disassemble -no-show-raw-insn - | FileCheck -check-prefix=CHECK -check-prefix=CHECK-OPT %s
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# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu -mc-relax-all %s -o - \
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# RUN: | llvm-objdump -disassemble -no-show-raw-insn - | FileCheck -check-prefix=CHECK -check-prefix=CHECK-RELAX %s
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# Test simple NOP insertion for single instructions.
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.text
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foo:
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# Will be bundle-aligning to 16 byte boundaries
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.bundle_align_mode 4
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pushq %rbp
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pushq %r14
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pushq %rbx
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movl %edi, %ebx
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callq bar
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movl %eax, %r14d
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imull $17, %ebx, %ebp
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# This imull is 3 bytes long and should have started at 0xe, so two bytes
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# of nop padding are inserted instead and it starts at 0x10
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# CHECK: nop
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# CHECK-NEXT: 10: imull
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movl %ebx, %edi
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callq bar
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cmpl %r14d, %ebp
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# CHECK-RELAX: nopl
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jle .L_ELSE
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# Due to the padding that's inserted before the addl, the jump target
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# becomes farther by one byte.
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# CHECK-OPT: jle 5
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# CHECK-RELAX: jle 7
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addl %ebp, %eax
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# CHECK-OPT: nop
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# CHECK-OPT-NEXT:20: addl
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# CHECK-RELAX: 26: addl
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jmp .L_RET
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.L_ELSE:
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imull %ebx, %eax
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.L_RET:
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ret
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# Just sanity checking that data fills don't drive bundling crazy
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.data
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.byte 40
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.byte 98
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