7dcb9c0f09
This was looking for full copies produced by SplitKit, but SplitKit introduces copy bundles if not all lanes are live. The scan for uses needs to look at bundles, not individual instructions. This is a prerequisite to avoiding some redundant spills due to subregisters which will help avoid an allocation failure in a future patch.
138 lines
5.7 KiB
LLVM
138 lines
5.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -stress-regalloc=4 -o - %s | FileCheck %s
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; Make sure we can rematerialize split 64-bit constants (which
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; MachineLICM hoisted out of the loop) and avoid spilling inside the
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; loop.
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;
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; MachineLICM originally believed the constant materializes to be
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; rematerializable, but the lowered REG_SEQUENCE uses they coalesece
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; into were not. The InlineSpiller also did not recognize redundant
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; spills inside the loop, so we would repeatedly reload the same
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; values.
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define amdgpu_kernel void @_Z6kernelILi4000ELi1EEvPd(ptr addrspace(1) %x.coerce) {
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; CHECK-LABEL: _Z6kernelILi4000ELi1EEvPd:
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; CHECK: ; %bb.0: ; %entry
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; CHECK-NEXT: s_mov_b64 s[0:1], 0
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; CHECK-NEXT: s_load_dword s2, s[0:1], 0x0
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; CHECK-NEXT: ; kill: killed $sgpr0_sgpr1
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; CHECK-NEXT: s_mov_b32 s7, 0x401c0000
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; CHECK-NEXT: s_mov_b32 s5, 0x40280000
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; CHECK-NEXT: s_waitcnt lgkmcnt(0)
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; CHECK-NEXT: v_writelane_b32 v0, s2, 0
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; CHECK-NEXT: s_load_dwordx2 s[2:3], s[0:1], 0x0
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; CHECK-NEXT: s_mov_b32 s0, 0
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; CHECK-NEXT: s_mov_b32 s1, 0x40140000
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; CHECK-NEXT: s_mov_b32 s1, 0x40180000
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; CHECK-NEXT: v_writelane_b32 v0, s0, 1
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; CHECK-NEXT: v_writelane_b32 v0, s1, 2
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; CHECK-NEXT: s_mov_b32 s1, 0x40220000
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; CHECK-NEXT: v_writelane_b32 v0, s0, 3
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; CHECK-NEXT: v_writelane_b32 v0, s1, 4
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; CHECK-NEXT: s_mov_b32 s1, 0x40240000
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; CHECK-NEXT: v_writelane_b32 v0, s0, 5
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; CHECK-NEXT: v_writelane_b32 v0, s1, 6
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; CHECK-NEXT: s_mov_b32 s1, 0x40260000
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; CHECK-NEXT: v_writelane_b32 v0, s0, 7
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; CHECK-NEXT: s_waitcnt lgkmcnt(0)
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; CHECK-NEXT: v_mov_b32_e32 v1, s2
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; CHECK-NEXT: v_writelane_b32 v0, s1, 8
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; CHECK-NEXT: v_mov_b32_e32 v2, s3
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; CHECK-NEXT: .LBB0_1: ; %for.cond4.preheader
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; CHECK-NEXT: ; =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], 0
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; CHECK-NEXT: s_mov_b32 s2, 0
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; CHECK-NEXT: s_mov_b32 s3, 0x40140000
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; CHECK-NEXT: v_writelane_b32 v0, s6, 9
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; CHECK-NEXT: v_writelane_b32 v0, s7, 10
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; CHECK-NEXT: v_writelane_b32 v0, s0, 11
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; CHECK-NEXT: v_readlane_b32 s6, v0, 1
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; CHECK-NEXT: v_readlane_b32 s7, v0, 2
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[2:3]
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; CHECK-NEXT: s_mov_b32 s1, s7
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; CHECK-NEXT: s_mov_b32 s0, s2
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; CHECK-NEXT: v_writelane_b32 v0, s6, 1
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; CHECK-NEXT: v_writelane_b32 v0, s7, 2
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; CHECK-NEXT: v_readlane_b32 s6, v0, 9
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; CHECK-NEXT: v_readlane_b32 s7, v0, 10
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; CHECK-NEXT: s_mov_b32 s6, s2
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[0:1]
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; CHECK-NEXT: v_readlane_b32 s0, v0, 3
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; CHECK-NEXT: v_readlane_b32 s1, v0, 4
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; CHECK-NEXT: s_mov_b32 s3, s1
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; CHECK-NEXT: s_mov_b32 s0, 0
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; CHECK-NEXT: s_mov_b32 s1, 0x40140000
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; CHECK-NEXT: s_mov_b32 s2, s0
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; CHECK-NEXT: s_mov_b32 s1, s3
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[6:7]
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; CHECK-NEXT: v_writelane_b32 v0, s0, 3
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; CHECK-NEXT: v_writelane_b32 v0, s1, 4
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; CHECK-NEXT: v_readlane_b32 s0, v0, 5
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; CHECK-NEXT: v_readlane_b32 s1, v0, 6
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[2:3]
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; CHECK-NEXT: s_mov_b32 s3, s1
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; CHECK-NEXT: s_mov_b32 s0, 0
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; CHECK-NEXT: s_mov_b32 s1, 0x40140000
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; CHECK-NEXT: s_mov_b32 s2, s0
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; CHECK-NEXT: s_mov_b32 s1, s3
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; CHECK-NEXT: v_writelane_b32 v0, s0, 5
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; CHECK-NEXT: v_writelane_b32 v0, s1, 6
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[2:3]
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; CHECK-NEXT: v_readlane_b32 s0, v0, 7
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; CHECK-NEXT: v_readlane_b32 s1, v0, 8
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; CHECK-NEXT: s_mov_b32 s3, s1
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; CHECK-NEXT: s_mov_b32 s0, 0
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; CHECK-NEXT: s_mov_b32 s1, 0x40140000
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; CHECK-NEXT: s_mov_b32 s2, s0
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; CHECK-NEXT: s_mov_b32 s1, s3
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[2:3]
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; CHECK-NEXT: v_writelane_b32 v0, s0, 7
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; CHECK-NEXT: v_writelane_b32 v0, s1, 8
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; CHECK-NEXT: s_mov_b32 s0, 0
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; CHECK-NEXT: s_mov_b32 s1, 0x40140000
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; CHECK-NEXT: s_mov_b32 s4, s0
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; CHECK-NEXT: v_readlane_b32 s0, v0, 0
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; CHECK-NEXT: v_readlane_b32 s2, v0, 11
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; CHECK-NEXT: v_add_f64 v[1:2], v[1:2], s[4:5]
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; CHECK-NEXT: s_add_i32 s2, s2, s0
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; CHECK-NEXT: v_writelane_b32 v0, s2, 11
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; CHECK-NEXT: v_readlane_b32 s0, v0, 11
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; CHECK-NEXT: s_cmpk_lt_i32 s0, 0xa00
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; CHECK-NEXT: s_cbranch_scc1 .LBB0_1
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; CHECK-NEXT: ; %bb.2: ; %for.cond.cleanup.loopexit
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; CHECK-NEXT: v_mov_b32_e32 v3, 0
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; CHECK-NEXT: v_mov_b32_e32 v4, 0
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; CHECK-NEXT: global_store_dwordx2 v[3:4], v[1:2], off
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; CHECK-NEXT: s_endpgm
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entry:
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%0 = load i32, ptr addrspace(4) null, align 4
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%cmp6 = icmp slt i32 0, 2560
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br i1 %cmp6, label %for.cond4.preheader, label %for.cond.cleanup
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for.cond4.preheader: ; preds = %for.cond4.preheader, %entry
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%idx.07 = phi i32 [ %add13, %for.cond4.preheader ], [ 0, %entry ]
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%arrayidx.promoted = load double, ptr addrspace(1) null, align 8
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%add9 = fadd contract double %arrayidx.promoted, 0.000000e+00
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%add9.1 = fadd contract double %add9, 5.000000e+00
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%add9.2 = fadd contract double %add9.1, 6.000000e+00
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%add9.3 = fadd contract double %add9.2, 7.000000e+00
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%add9.4 = fadd contract double %add9.3, 9.000000e+00
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%add9.5 = fadd contract double %add9.4, 1.000000e+01
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%add9.6 = fadd contract double %add9.5, 1.100000e+01
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%add9.7 = fadd contract double %add9.6, 1.200000e+01
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store double %add9.7, ptr addrspace(1) null, align 8
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%add13 = add i32 %idx.07, %0
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%cmp = icmp slt i32 %add13, 2560
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br i1 %cmp, label %for.cond4.preheader, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond4.preheader, %entry
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x() #0
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declare i32 @llvm.amdgcn.workgroup.id.x() #0
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declare align 4 ptr addrspace(4) @llvm.amdgcn.dispatch.ptr() #0
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attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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