derek.holloway
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54 lines
2.8 KiB
LLVM
54 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -greedy-reverse-local-assignment=0 -mcpu=gfx900 < %s | FileCheck -check-prefixes=FORWARDXNACK %s
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -greedy-reverse-local-assignment=1 -mcpu=gfx900 < %s | FileCheck -check-prefixes=REVERSEXNACK %s
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -greedy-reverse-local-assignment=0 -mcpu=gfx900 -mattr=-xnack < %s | FileCheck -check-prefix=NOXNACK %s
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -greedy-reverse-local-assignment=1 -mcpu=gfx900 -mattr=-xnack < %s | FileCheck -check-prefix=NOXNACK %s
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; Test the change in the behavior of the allocator with
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; -greedy-reverse-local-reassignment enabled. This case shows a
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; regression with it enabled if xnack is enabled.
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; The outgoing return physical register copies strongly hint the
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; output registers to use for the load return values, and end up
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; taking precedence over the copies from the incoming values with
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; reverse order. With the kills inserted to artifically extend the
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; pointer live ranges to hint the soft clause, we get worse
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; allocation and need the extra copies before the loads.
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define <4 x half> @shuffle_v4f16_234u(ptr addrspace(1) %arg0, ptr addrspace(1) %arg1) {
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; FORWARDXNACK-LABEL: shuffle_v4f16_234u:
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; FORWARDXNACK: ; %bb.0:
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; FORWARDXNACK-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; FORWARDXNACK-NEXT: global_load_dword v6, v[0:1], off offset:4
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; FORWARDXNACK-NEXT: global_load_dwordx2 v[4:5], v[2:3], off
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; FORWARDXNACK-NEXT: s_waitcnt vmcnt(1)
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; FORWARDXNACK-NEXT: v_mov_b32_e32 v0, v6
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; FORWARDXNACK-NEXT: s_waitcnt vmcnt(0)
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; FORWARDXNACK-NEXT: v_mov_b32_e32 v1, v4
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; FORWARDXNACK-NEXT: s_setpc_b64 s[30:31]
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;
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; REVERSEXNACK-LABEL: shuffle_v4f16_234u:
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; REVERSEXNACK: ; %bb.0:
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; REVERSEXNACK-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; REVERSEXNACK-NEXT: v_mov_b32_e32 v6, v1
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; REVERSEXNACK-NEXT: v_mov_b32_e32 v5, v0
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; REVERSEXNACK-NEXT: v_mov_b32_e32 v4, v3
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; REVERSEXNACK-NEXT: v_mov_b32_e32 v3, v2
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; REVERSEXNACK-NEXT: global_load_dword v0, v[5:6], off offset:4
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; REVERSEXNACK-NEXT: global_load_dwordx2 v[1:2], v[3:4], off
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; REVERSEXNACK-NEXT: s_waitcnt vmcnt(0)
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; REVERSEXNACK-NEXT: s_setpc_b64 s[30:31]
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;
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; NOXNACK-LABEL: shuffle_v4f16_234u:
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; NOXNACK: ; %bb.0:
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; NOXNACK-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
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; NOXNACK-NEXT: global_load_dword v0, v[0:1], off offset:4
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; NOXNACK-NEXT: global_load_dwordx2 v[1:2], v[2:3], off
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; NOXNACK-NEXT: s_waitcnt vmcnt(0)
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; NOXNACK-NEXT: s_setpc_b64 s[30:31]
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%val0 = load <4 x half>, ptr addrspace(1) %arg0
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%val1 = load <4 x half>, ptr addrspace(1) %arg1
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%shuffle = shufflevector <4 x half> %val0, <4 x half> %val1, <4 x i32> <i32 2, i32 3, i32 4, i32 poison>
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ret <4 x half> %shuffle
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}
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