1 # RUN: llc -mtriple=x86_64-none-linux-gnu -run-pass=postra-machine-sink -verify-machineinstrs -o - %s | FileCheck %s
3 # This test was originally generated from the following sample:
6 # extern void x3(int, int);
12 # The code generates a COPY instruction which the PostRA Machine Sink pass will
13 # try to sink. Earlier versions were not performing the sink due to a
14 # DBG_VALUE instruction confusing the sinking algorithm.
17 @x0 = common dso_local global i32 0, align 4, !dbg !0
19 define dso_local void @x1(i32) !dbg !11 {
20 %2 = alloca i32, align 4
21 store i32 %0, ptr %2, align 4
22 call void @llvm.dbg.declare(metadata ptr %2, metadata !14, metadata !DIExpression()), !dbg !16
23 %3 = load i32, ptr @x0, align 4, !dbg !16
24 %4 = icmp ne i32 %3, 0, !dbg !16
25 br i1 %4, label %5, label %7, !dbg !16
27 ; <label>:5: ; preds = %1
28 %6 = load i32, ptr %2, align 4, !dbg !16
29 call void @x3(i32 0, i32 %6), !dbg !16
32 ; <label>:7: ; preds = %5, %1
36 declare void @llvm.dbg.declare(metadata, metadata, metadata)
37 declare dso_local void @x3(i32, i32)
40 !llvm.module.flags = !{!7, !8}
42 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
43 !1 = distinct !DIGlobalVariable(name: "x0", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
44 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
45 !3 = !DIFile(filename: "test.c", directory: "")
48 !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
49 !7 = !{i32 2, !"Dwarf Version", i32 4}
50 !8 = !{i32 2, !"Debug Info Version", i32 3}
51 !11 = distinct !DISubprogram(name: "x1", scope: !3, file: !3, line: 3, type: !12, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !2)
52 !12 = !DISubroutineType(types: !13)
54 !14 = !DILocalVariable(name: "x2", arg: 1, scope: !11, file: !3, line: 3, type: !6)
55 !15 = distinct !DILexicalBlock(scope: !11, file: !3, line: 4, column: 7)
56 !16 = !DILocation(line: 4, column: 7, scope: !15)
62 # CHECK-NOT: $eax = COPY $edi
64 # CHECK: renamable $eax = COPY $edi
65 # CHECK-NEXT: DBG_VALUE $eax,
69 tracksRegLiveness: true
72 successors: %bb.2, %bb.1; %bb.2, %bb.1
74 DBG_VALUE $edi, $noreg, !14, !DIExpression(), debug-location !16
75 renamable $eax = COPY $edi
76 DBG_VALUE $eax, $noreg, !14, !DIExpression(), debug-location !16
77 CMP32mi8 $rip, 1, $noreg, @x0, $noreg, 0, implicit-def $eflags, debug-location !16
78 JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !16
79 JMP_1 %bb.1, debug-location !16
83 $edi = MOV32r0 implicit-def dead $eflags, debug-location !16
84 $esi = COPY killed renamable $eax, debug-location !16
87 RET 0, debug-location !16