derek.holloway
7502bf64a4
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47 lines
2.0 KiB
ArmAsm
47 lines
2.0 KiB
ArmAsm
// A PC-materialized s_set_pc_i64 jump (not a call) into the interior of another
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// function is not tracked as an unresolved call target, so it does not trip the
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// object-wide unresolved-target guard. The VGPR-MSB analysis must still resolve
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// the jump's materialized target over the rewrite's control-flow surface, see
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// that it enters test_target at a non-start offset (skipping the s_set_vgpr_msb
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// prefix), and decline the mandatory WMMA split there. Analyzing test_target
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// from its symbol start would emit brackets for the wrong incoming mode.
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//
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// CHECK-NOT verifies the decline comes from the interior-entry resolver, not
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// from the unresolved-call bail: no "unresolved call target" is logged here.
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// RUN: %clang -target amdgcn-amd-amdhsa -mcpu=gfx1250 -nostdlib %s -o %t.elf
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// RUN: env AMD_COMGR_EMIT_VERBOSE_LOGS=1 hotswap-rewrite %t.elf \
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// RUN: amdgcn-amd-amdhsa--gfx1250:gfx1250-b0-specific+ \
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// RUN: amdgcn-amd-amdhsa--gfx1250:gfx1250-b0-specific- \
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// RUN: --strict-mode --output %t.out.elf --expect-status ERROR 2>&1 \
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// RUN: | %FileCheck %s
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// RUN: test ! -e %t.out.elf
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// CHECK-NOT: unresolved call target
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// CHECK-LABEL: WMMA split: cannot determine VGPR-MSB mode
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// CHECK: RESULT: ERROR
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.amdgcn_target "amdgcn-amd-amdhsa--gfx1250"
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.text
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.globl test_source
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.p2align 8
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.type test_source,@function
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test_source:
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// Materialize test_target's interior (.text+0x104) and tail-jump to it. The
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// captured PC is the s_add address (.text+0x4), so the +0x100 displacement
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// lands past test_target's s_set_vgpr_msb prefix. The small inline immediate
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// keeps the compiler-canonical s_add form the target resolver understands.
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s_get_pc_i64 s[0:1]
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s_add_nc_u64 s[0:1], s[0:1], 0x100
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s_set_pc_i64 s[0:1]
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.size test_source, .-test_source
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.globl test_target
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.p2align 8
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.type test_target,@function
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test_target:
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s_set_vgpr_msb 0x60
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.Ltarget_interior:
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v_wmma_f32_16x16x128_fp8_fp8 v[32:39], v[0:15], v[16:31], 0
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s_endpgm
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.size test_target, .-test_target
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