derek.holloway
7502bf64a4
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82 lines
2.9 KiB
ArmAsm
82 lines
2.9 KiB
ArmAsm
// COM: Test HotSwap cluster_load addressing-form selectivity. The in-place
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// COM: B0->A0 replacement templates target the saddr=off (64-bit vaddr)
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// COM: encoding. The SGPR-relative (_SADDR) variant shares the display
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// COM: mnemonic but is a distinct MC opcode with a different operand layout,
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// COM: so reusing the off-form opcode would mis-encode its operands and
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// COM: corrupt the address at runtime. The in-place pass must skip _SADDR,
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// COM: then the trampoline pass must wrap that remaining cluster_load with
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// COM: the A0 M0 wg_mask save/clear/restore sequence.
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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: The original _SADDR site is redirected to a sled/trampoline. The
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// COM: remaining cluster_load body is bracketed by M0 save, M0 wg_mask
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// COM: clear, and M0 restore.
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// DISASM-LABEL: <test_saddr_kernel>:
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// DISASM: s_branch
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// DISASM-NOT: cluster_load_b32 {{.*}}, off
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// COM: The saddr=off site that followed is rewritten to global_load_b32,
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// COM: proving the skip is specific to the _SADDR form, not a blanket opt-out.
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// DISASM: global_load_b32 v{{[0-9]+}}, v[{{[0-9:]+}}], off
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// DISASM: s_endpgm
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// DISASM: s_mov_b32 [[SCRATCH:s[0-9]+]], m0
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// DISASM-NEXT: s_pack_hh_b32_b16 m0, 0, m0
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// DISASM-NEXT: cluster_load_b32 v{{[0-9]+}}, v{{[0-9]+}}, s[{{[0-9:]+}}]
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// DISASM-NEXT: s_mov_b32 m0, [[SCRATCH]]
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// COM: Idempotency: output should be identical on second rewrite.
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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: --output %t.out2.elf \
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// RUN: | %FileCheck --check-prefix=API2 %s
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// API2: RESULT: SUCCESS
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// RUN: cmp %t.out.elf %t.out2.elf
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.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
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.text
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.globl test_saddr_kernel
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.p2align 8
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.type test_saddr_kernel,@function
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test_saddr_kernel:
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// SGPR-relative (SADDR) form -- must be left unchanged.
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cluster_load_b32 v4, v1, s[2:3]
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s_wait_loadcnt 0x0
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// saddr=off form -- must be swapped to global_load_b32.
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cluster_load_b32 v5, v[2:3], off
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s_wait_loadcnt 0x0
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s_endpgm
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.Ltest_saddr_kernel_end:
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.size test_saddr_kernel, .Ltest_saddr_kernel_end-test_saddr_kernel
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.rodata
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.p2align 8
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.amdhsa_kernel test_saddr_kernel
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.amdhsa_next_free_vgpr 6
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.amdhsa_next_free_sgpr 4
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.end_amdhsa_kernel
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.amdgpu_metadata
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amdhsa.version:
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- 3
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- 0
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amdhsa.kernels:
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- .name: test_saddr_kernel
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.symbol: test_saddr_kernel.kd
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.sgpr_count: 4
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.vgpr_count: 6
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.kernarg_segment_size: 0
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.group_segment_fixed_size: 0
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.private_segment_fixed_size: 0
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.kernarg_segment_align: 8
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.wavefront_size: 64
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.max_flat_workgroup_size: 256
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.end_amdgpu_metadata
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