128 lines
5.8 KiB
LLVM
128 lines
5.8 KiB
LLVM
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; REQUIRES: aarch64-registered-target
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; RUN: opt < %s -codegenprepare -mtriple=arm64-apple-ios -S | FileCheck %s
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@first_ones = external global [65536 x i8]
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define i32 @fct19(i64 %arg1) #0 !dbg !6 {
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; CHECK-LABEL: @fct19
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entry:
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%x.sroa.1.0.extract.shift = lshr i64 %arg1, 16, !dbg !35
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%x.sroa.1.0.extract.trunc = trunc i64 %x.sroa.1.0.extract.shift to i16, !dbg !36
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%x.sroa.3.0.extract.shift = lshr i64 %arg1, 32, !dbg !37
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call void @llvm.dbg.value(metadata i64 %x.sroa.3.0.extract.shift, metadata !13, metadata !DIExpression()), !dbg !37
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; CHECK: call void @llvm.dbg.value(metadata i64 %arg1, metadata {{.*}}, metadata !DIExpression(DW_OP_constu, 32, DW_OP_shr, DW_OP_stack_value)), !dbg [[shift2_loc:![0-9]+]]
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%x.sroa.5.0.extract.shift = lshr i64 %arg1, 48, !dbg !38
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%tobool = icmp eq i64 %x.sroa.5.0.extract.shift, 0, !dbg !39
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br i1 %tobool, label %if.end, label %if.then, !dbg !40
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if.then: ; preds = %entry
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%arrayidx3 = getelementptr inbounds [65536 x i8], [65536 x i8]* @first_ones, i64 0, i64 %x.sroa.5.0.extract.shift, !dbg !41
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%0 = load i8, i8* %arrayidx3, align 1, !dbg !42
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%conv = zext i8 %0 to i32, !dbg !43
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br label %return, !dbg !44
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if.end: ; preds = %entry
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; CHECK-LABEL: if.end:
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; CHECK-NEXT: lshr i64 %arg1, 32, !dbg [[shift2_loc]]
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%x.sroa.3.0.extract.trunc = trunc i64 %x.sroa.3.0.extract.shift to i16, !dbg !45
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%tobool6 = icmp eq i16 %x.sroa.3.0.extract.trunc, 0, !dbg !46
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br i1 %tobool6, label %if.end13, label %if.then7, !dbg !47
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if.then7: ; preds = %if.end
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%idxprom10 = and i64 %x.sroa.3.0.extract.shift, 65535, !dbg !48
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%arrayidx11 = getelementptr inbounds [65536 x i8], [65536 x i8]* @first_ones, i64 0, i64 %idxprom10, !dbg !49
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%1 = load i8, i8* %arrayidx11, align 1, !dbg !50
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%conv12 = zext i8 %1 to i32, !dbg !51
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%add = add nsw i32 %conv12, 16, !dbg !52
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br label %return, !dbg !53
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if.end13: ; preds = %if.end
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; CHECK-LABEL: if.end13:
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; CHECK-NEXT: [[shift1:%.*]] = lshr i64 %arg1, 16, !dbg [[shift1_loc:![0-9]+]]
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; CHECK-NEXT: trunc i64 [[shift1]] to i16, !dbg [[trunc1_loc:![0-9]+]]
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%tobool16 = icmp eq i16 %x.sroa.1.0.extract.trunc, 0, !dbg !54
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br i1 %tobool16, label %return, label %if.then17, !dbg !55
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if.then17: ; preds = %if.end13
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%idxprom20 = and i64 %x.sroa.1.0.extract.shift, 65535, !dbg !56
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%arrayidx21 = getelementptr inbounds [65536 x i8], [65536 x i8]* @first_ones, i64 0, i64 %idxprom20, !dbg !57
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%2 = load i8, i8* %arrayidx21, align 1, !dbg !58
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%conv22 = zext i8 %2 to i32, !dbg !59
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%add23 = add nsw i32 %conv22, 32, !dbg !60
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br label %return, !dbg !61
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return: ; preds = %if.then17, %if.end13, %if.then7, %if.then
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%retval.0 = phi i32 [ %conv, %if.then ], [ %add, %if.then7 ], [ %add23, %if.then17 ], [ 64, %if.end13 ], !dbg !62
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ret i32 %retval.0, !dbg !63
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}
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; CodeGenPrepare was erasing the unused lshr instruction, but then further
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; processing the instruction after it was freed. If this bug is still present,
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; this test will always crash in an LLVM built with ASAN enabled, and may
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; crash even if ASAN is not enabled.
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define i32 @shift_unused(i32 %a) {
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; CHECK-LABEL: @shift_unused(
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; CHECK-NEXT: BB2:
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; CHECK-NEXT: ret i32 [[A:%.*]]
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;
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%as = lshr i32 %a, 3
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br label %BB2
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BB2:
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ret i32 %a
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}
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; CHECK: [[shift1_loc]] = !DILocation(line: 1
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; CHECK: [[trunc1_loc]] = !DILocation(line: 2
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; CHECK: [[shift2_loc]] = !DILocation(line: 3
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind readonly ssp }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "sink-shift-and-trunc.ll", directory: "/")
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!2 = !{}
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!5 = !{i32 2, !"Debug Info Version", i32 3}
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!6 = distinct !DISubprogram(name: "fct19", linkageName: "fct19", scope: null, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: true, unit: !0, retainedNodes: !8)
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!7 = !DISubroutineType(types: !2)
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!8 = !{!13}
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!10 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned)
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!13 = !DILocalVariable(name: "3", scope: !6, file: !1, line: 3, type: !10)
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!35 = !DILocation(line: 1, column: 1, scope: !6)
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!36 = !DILocation(line: 2, column: 1, scope: !6)
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!37 = !DILocation(line: 3, column: 1, scope: !6)
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!38 = !DILocation(line: 4, column: 1, scope: !6)
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!39 = !DILocation(line: 5, column: 1, scope: !6)
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!40 = !DILocation(line: 6, column: 1, scope: !6)
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!41 = !DILocation(line: 7, column: 1, scope: !6)
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!42 = !DILocation(line: 8, column: 1, scope: !6)
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!43 = !DILocation(line: 9, column: 1, scope: !6)
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!44 = !DILocation(line: 10, column: 1, scope: !6)
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!45 = !DILocation(line: 11, column: 1, scope: !6)
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!46 = !DILocation(line: 12, column: 1, scope: !6)
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!47 = !DILocation(line: 13, column: 1, scope: !6)
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!48 = !DILocation(line: 14, column: 1, scope: !6)
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!49 = !DILocation(line: 15, column: 1, scope: !6)
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!50 = !DILocation(line: 16, column: 1, scope: !6)
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!51 = !DILocation(line: 17, column: 1, scope: !6)
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!52 = !DILocation(line: 18, column: 1, scope: !6)
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!53 = !DILocation(line: 19, column: 1, scope: !6)
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!54 = !DILocation(line: 20, column: 1, scope: !6)
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!55 = !DILocation(line: 21, column: 1, scope: !6)
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!56 = !DILocation(line: 22, column: 1, scope: !6)
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!57 = !DILocation(line: 23, column: 1, scope: !6)
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!58 = !DILocation(line: 24, column: 1, scope: !6)
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!59 = !DILocation(line: 25, column: 1, scope: !6)
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!60 = !DILocation(line: 26, column: 1, scope: !6)
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!61 = !DILocation(line: 27, column: 1, scope: !6)
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!62 = !DILocation(line: 28, column: 1, scope: !6)
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!63 = !DILocation(line: 29, column: 1, scope: !6)
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