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be591983cd
The 2nd loop calculates spill costs but reports free registers as cost 0 anyway, so there is little benefit from having a separate early loop. Surprisingly this is not NFC, as many register are marked regDisabled so the first loop often picks up later registers unnecessarily instead of the first one available in the allocation order... Patch by Matthias Braun llvm-svn: 356499
49 lines
1.9 KiB
LLVM
49 lines
1.9 KiB
LLVM
; RUN: llc < %s -O0 -stop-after=livedebugvalues -o - | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.13.0"
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define void @foo(i32* %p) !dbg !4 {
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bb:
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%tmp = load i32, i32* %p, align 4, !dbg !7
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; CHECK: $eax = MOV32rm killed {{.*}} $rdi, {{.*}} debug-location !7 :: (load 4 from %ir.p)
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; CHECK-NEXT: $ecx = MOV32rr killed $eax, implicit-def $rcx, debug-location !7
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; CHECK-NEXT: $rdx = MOV64rr $rcx, debug-location !7
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switch i32 %tmp, label %bb7 [
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i32 0, label %bb1
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i32 1, label %bb2
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i32 2, label %bb3
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i32 3, label %bb4
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], !dbg !8
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bb1: ; preds = %bb
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unreachable
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bb2: ; preds = %bb
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unreachable
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bb3: ; preds = %bb
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unreachable
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bb4: ; preds = %bb
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unreachable
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bb7: ; preds = %bb
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ret void, !dbg !9
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 7.0.0 (trunk 330770) (llvm/trunk 330769)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly)
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!1 = !DIFile(filename: "/Users/vsk/src/llvm.org-master/llvm/lib/Demangle/ItaniumDemangle.cpp", directory: "/Users/vsk/src/builds/llvm.org-master-RA-stage2")
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!2 = !{i32 2, !"Debug Info Version", i32 3}
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!3 = !{i32 7, !"PIC Level", i32 2}
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!4 = distinct !DISubprogram(name: "printLeft", scope: !1, file: !1, line: 1306, type: !5, isLocal: true, isDefinition: true, scopeLine: 1306, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
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!5 = !DISubroutineType(types: !6)
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!6 = !{}
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!7 = !DILocation(line: 1307, column: 13, scope: !4)
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!8 = !DILocation(line: 1307, column: 5, scope: !4)
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!9 = !DILocation(line: 1327, column: 3, scope: !4)
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