derek.holloway
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54 lines
2.8 KiB
LLVM
54 lines
2.8 KiB
LLVM
; RUN: opt -passes=memcpyopt -S %s -verify-memoryssa | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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@C = external constant [0 x i8]
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1)
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture readonly, i64, i1)
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define void @test_constant(i64 %src_size, ptr %dst, i64 %dst_size, i8 %c) !dbg !5 !prof !14 {
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; CHECK-LABEL: define void @test_constant(
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; CHECK-SAME: i64 [[SRC_SIZE:%.*]], ptr [[DST:%.*]], i64 [[DST_SIZE:%.*]], i8 [[C:%.*]]) !dbg [[DBG5:![0-9]+]] !prof {{.*}} {
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; CHECK-NEXT: [[NON_ZERO:%.*]] = icmp ne i64 [[SRC_SIZE]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[NON_ZERO]])
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; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i64 [[DST_SIZE]], [[SRC_SIZE]], !dbg [[DBG11:![0-9]+]]
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; CHECK-NEXT: [[TMP2:%.*]] = sub i64 [[DST_SIZE]], [[SRC_SIZE]], !dbg [[DBG11]]
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; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[TMP1]], i64 0, i64 [[TMP2]], !dbg [[DBG11]], !prof [[SELPROF:![0-9]+]]
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; CHECK-NEXT: [[TMP4:%.*]] = getelementptr i8, ptr [[DST]], i64 [[SRC_SIZE]], !dbg [[DBG11]]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 1 [[TMP4]], i8 [[C]], i64 [[TMP3]], i1 false), !dbg [[DBG11]]
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[DST]], ptr @C, i64 [[SRC_SIZE]], i1 false), !dbg [[DBG12:![0-9]+]]
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; CHECK-NEXT: ret void, !dbg [[DBG13:![0-9]+]]
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;
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%non.zero = icmp ne i64 %src_size, 0
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call void @llvm.assume(i1 %non.zero)
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call void @llvm.memset.p0.i64(ptr %dst, i8 %c, i64 %dst_size, i1 false), !dbg !11
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call void @llvm.memcpy.p0.p0.i64(ptr %dst, ptr @C, i64 %src_size, i1 false), !dbg !12
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ret void, !dbg !13
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}
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; Validate that the memset is mapped to DILocation for the original memset.
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; CHECK: [[DBG11]] = !DILocation(line: 1,
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; CHECK: [[SELPROF]] = !{!"unknown", !"memcpyopt"}
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; CHECK: [[DBG12]] = !DILocation(line: 2,
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; CHECK: [[DBG13]] = !DILocation(line: 3,
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!2, !3}
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!llvm.module.flags = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "memset-memcpy-dbgloc.ll", directory: "/")
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!2 = !{i32 3}
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!3 = !{i32 1}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "test_constant", linkageName: "test_constant", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
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!6 = !DISubroutineType(types: !7)
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!7 = !{}
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!8 = !{!9}
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!9 = !DILocalVariable(name: "1", scope: !5, file: !1, line: 3, type: !10)
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!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned)
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!11 = !DILocation(line: 1, column: 1, scope: !5)
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!12 = !DILocation(line: 2, column: 1, scope: !5)
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!13 = !DILocation(line: 3, column: 1, scope: !5)
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!14 = !{!"function_entry_count", i32 10} |