derek.holloway
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81 lines
2.9 KiB
ArmAsm
81 lines
2.9 KiB
ArmAsm
// COM: Test the true trampoline fallback path for ds_*_2addr_stride64_*
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// COM: when no NOP sled is available. This file contains a single kernel
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// COM: with no NOP padding, forcing emitReplacementCode to use
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// COM: emitToTrampoline. The trampoline body (expanded DS instructions +
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// COM: branch-back) is appended after .text via growWithTrampolines.
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// RUN: %clang -target amdgcn-amd-amdhsa -mcpu=gfx1250 -nostdlib %s -o %t.elf
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// RUN: hotswap-rewrite %t.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250 amdgcn-amd-amdhsa--gfx1250 \
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// RUN: --output %t.out.elf \
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// RUN: | %FileCheck --check-prefix=API %s
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// API: RESULT: SUCCESS
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// RUN: %llvm-objdump -d %t.out.elf | %FileCheck --check-prefix=DISASM %s
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// COM: Entry displacement is applied before ordinary instruction rewriting.
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// COM: Verify that the direct entry prefix and appended DS trampoline coexist
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// COM: with branch sites calculated from the displaced instruction layout.
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// RUN: hotswap-rewrite %t.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250 amdgcn-amd-amdhsa--gfx1250 \
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// RUN: --entry-trampolines --output %t.entry.elf \
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// RUN: | %FileCheck --check-prefix=ENTRY-API %s
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// ENTRY-API: RESULT: SUCCESS
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// RUN: %llvm-objdump -d %t.entry.elf | %FileCheck --check-prefix=ENTRY %s
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// ENTRY-LABEL: <test_ds_trampoline>:
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// ENTRY-NEXT: global_prefetch_b8 v0, s[0:1] scope:SCOPE_SE
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// ENTRY-NEXT: v_nop
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// ENTRY-NEXT: s_branch
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// ENTRY-NEXT: s_nop 0
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// ENTRY-NEXT: s_wait_dscnt 0x0
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// ENTRY-NEXT: s_endpgm
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// ENTRY: ds_load_b32 v0, v2 offset:256
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// ENTRY-NEXT: ds_load_b32 v1, v2 offset:768
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// ENTRY-NEXT: s_wait_dscnt 0x0
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// ENTRY-NEXT: s_branch
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// ENTRY-NOT: s_get_pc_i64
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// COM: The original DS2 is gone; s_branch forward replaces it. The drain
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// COM: s_wait_dscnt stays at the original position with imm unchanged (0x0).
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// DISASM-LABEL: <test_ds_trampoline>:
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// DISASM-NOT: ds_load_2addr_stride64_b32
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// DISASM: s_branch
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// DISASM: s_wait_dscnt 0x0
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// DISASM: s_endpgm
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// COM: Trampoline body appended after .text: expanded DS loads + branch-back,
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// COM: followed by an executable prefetch guard sized from inst_pref_size.
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// DISASM: ds_load_b32 v0
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// DISASM: ds_load_b32 v1
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// DISASM: s_branch
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// DISASM-NEXT: s_code_end
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// DISASM-NEXT: s_code_end
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// COM: Idempotency
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// RUN: hotswap-rewrite %t.out.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250 amdgcn-amd-amdhsa--gfx1250 \
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// RUN: --check-idempotent \
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// RUN: | %FileCheck --check-prefix=IDEM %s
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// IDEM: IDEMPOTENT: YES
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.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
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.text
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.globl test_ds_trampoline
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.p2align 8
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.type test_ds_trampoline,@function
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test_ds_trampoline:
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ds_load_2addr_stride64_b32 v[0:1], v2 offset0:1 offset1:3
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s_wait_dscnt 0x0
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s_endpgm
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.Ltest_ds_trampoline_end:
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.size test_ds_trampoline, .Ltest_ds_trampoline_end-test_ds_trampoline
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.rodata
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.p2align 8
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.amdhsa_kernel test_ds_trampoline
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.amdhsa_next_free_vgpr 3
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.amdhsa_next_free_sgpr 1
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.amdhsa_inst_pref_size 2
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.end_amdhsa_kernel
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