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https://github.com/c64scene-ar/llvm-6502.git
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This changes the SelectionDAG scheduling preference to source order. Soon, the SelectionDAG scheduler can be bypassed saving a nice chunk of compile time. Performance differences that result from this change are often a consequence of register coalescing. The register coalescer is far from perfect. Bugs can be filed for deficiencies. On x86 SandyBridge/Haswell, the source order schedule is often preserved, particularly for small blocks. Register pressure is generally improved over the SD scheduler's ILP mode. However, we are still able to handle large blocks that require latency hiding, unlike the SD scheduler's BURR mode. MI scheduler also attempts to discover the critical path in single-block loops and adjust heuristics accordingly. The MI scheduler relies on the new machine model. This is currently unimplemented for AVX, so we may not be generating the best code yet. Unit tests are updated so they don't depend on SD scheduling heuristics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192750 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
3.2 KiB
LLVM
48 lines
3.2 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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; PR 9817
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declare <4 x i32> @__amdil_get_global_id_int()
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declare void @llvm.dbg.value(metadata , i64 , metadata )
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define void @__OpenCL_test_kernel(i32 addrspace(1)* %ip) nounwind {
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entry:
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call void @llvm.dbg.value(metadata !{i32 addrspace(1)* %ip}, i64 0, metadata
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!7), !dbg !8
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%0 = call <4 x i32> @__amdil_get_global_id_int() nounwind
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%1 = extractelement <4 x i32> %0, i32 0
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call void @llvm.dbg.value(metadata !{i32 %1}, i64 0, metadata !9), !dbg !11
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call void @llvm.dbg.value(metadata !12, i64 0, metadata !13), !dbg !14
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%tmp2 = load i32 addrspace(1)* %ip, align 4, !dbg !15
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%tmp3 = add i32 0, %tmp2, !dbg !15
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; CHECK: ##DEBUG_VALUE: idx <- E{{..$}}
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call void @llvm.dbg.value(metadata !{i32 %tmp3}, i64 0, metadata !13), !dbg
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!15
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%arrayidx = getelementptr i32 addrspace(1)* %ip, i32 %1, !dbg !16
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store i32 %tmp3, i32 addrspace(1)* %arrayidx, align 4, !dbg !16
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ret void, !dbg !17
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}
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!llvm.dbg.cu = !{!2}
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!0 = metadata !{i32 786478, metadata !19, metadata !1, metadata !"__OpenCL_test_kernel", metadata !"__OpenCL_test_kernel", metadata !"__OpenCL_test_kernel", i32 2, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 0, i1 false, null, null, null, null, i32 0} ; [ DW_TAG_subprogram ] [line 2] [def] [scope 0] [__OpenCL_test_kernel]
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!1 = metadata !{i32 786473, metadata !19} ; [ DW_TAG_file_type ]
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!2 = metadata !{i32 786449, metadata !19, i32 1, metadata !"clc", i1 false, metadata !"", i32 0, metadata !12, metadata !12, metadata !18, null, null, null} ; [ DW_TAG_compile_unit ]
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!3 = metadata !{i32 786453, metadata !19, metadata !1, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!4 = metadata !{null, metadata !5}
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!5 = metadata !{i32 786447, null, metadata !2, metadata !"", i32 0, i64 32, i64 32, i64 0, i32 0, metadata !6} ; [ DW_TAG_pointer_type ]
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!6 = metadata !{i32 786468, null, metadata !2, metadata !"unsigned int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ]
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!7 = metadata !{i32 786689, metadata !0, metadata !"ip", metadata !1, i32 1, metadata !5, i32 0, null} ; [ DW_TAG_arg_variable ]
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!8 = metadata !{i32 1, i32 42, metadata !0, null}
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!9 = metadata !{i32 786688, metadata !10, metadata !"gid", metadata !1, i32 3, metadata !6, i32 0, null} ; [ DW_TAG_auto_variable ]
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!10 = metadata !{i32 786443, metadata !19, metadata !0, i32 2, i32 1, i32 0} ; [ DW_TAG_lexical_block ]
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!11 = metadata !{i32 3, i32 41, metadata !10, null}
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!12 = metadata !{i32 0}
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!13 = metadata !{i32 786688, metadata !10, metadata !"idx", metadata !1, i32 4, metadata !6, i32 0, null} ; [ DW_TAG_auto_variable ]
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!14 = metadata !{i32 4, i32 20, metadata !10, null}
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!15 = metadata !{i32 5, i32 15, metadata !10, null}
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!16 = metadata !{i32 6, i32 18, metadata !10, null}
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!17 = metadata !{i32 7, i32 1, metadata !0, null}
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!18 = metadata !{metadata !0}
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!19 = metadata !{metadata !"OCL6368.tmp.cl", metadata !"E:\5CUsers\5Cmvillmow.AMD\5CAppData\5CLocal\5CTemp"}
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