70 lines
2.8 KiB
LLVM
70 lines
2.8 KiB
LLVM
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; RUN: llc -x86-discriminate-memops < %s | FileCheck %s
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; RUN: llc -x86-discriminate-memops -x86-bypass-prefetch-instructions=0 < %s | FileCheck %s -check-prefix=NOBYPASS
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;
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; original source, compiled with -O3 -gmlt -fdebug-info-for-profiling:
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; int sum(int* arr, int pos1, int pos2) {
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; return arr[pos1] + arr[pos2];
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; }
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;
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; ModuleID = 'test.cc'
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source_filename = "test.cc"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @llvm.prefetch(i8 *, i32, i32, i32)
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; Function Attrs: norecurse nounwind readonly uwtable
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define i32 @sum(i32* %arr, i32 %pos1, i32 %pos2) !dbg !7 {
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entry:
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%idxprom = sext i32 %pos1 to i64, !dbg !9
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%arrayidx = getelementptr inbounds i32, i32* %arr, i64 %idxprom, !dbg !9
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%0 = load i32, i32* %arrayidx, align 4, !dbg !9, !tbaa !10
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%idxprom1 = sext i32 %pos2 to i64, !dbg !14
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%arrayidx2 = getelementptr inbounds i32, i32* %arr, i64 %idxprom1, !dbg !14
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%addr = bitcast i32* %arrayidx2 to i8*
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call void @llvm.prefetch(i8* %addr, i32 0, i32 3, i32 1)
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%1 = load i32, i32* %arrayidx2, align 4, !dbg !14, !tbaa !10
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%add = add nsw i32 %1, %0, !dbg !15
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ret i32 %add, !dbg !16
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}
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attributes #0 = { "target-cpu"="x86-64" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, debugInfoForProfiling: true)
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!1 = !DIFile(filename: "test.cc", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 7.0.0 (trunk 322155) (llvm/trunk 322159)"}
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!7 = distinct !DISubprogram(name: "sum", linkageName: "sum", scope: !1, file: !1, line: 1, type: !8, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
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!8 = !DISubroutineType(types: !2)
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!9 = !DILocation(line: 2, column: 10, scope: !7)
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!10 = !{!11, !11, i64 0}
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!11 = !{!"int", !12, i64 0}
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!12 = !{!"omnipotent char", !13, i64 0}
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!13 = !{!"Simple C++ TBAA"}
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!14 = !DILocation(line: 2, column: 22, scope: !7)
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!15 = !DILocation(line: 2, column: 20, scope: !7)
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!16 = !DILocation(line: 2, column: 3, scope: !7)
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;CHECK-LABEL: sum:
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;CHECK: # %bb.0:
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;CHECK: prefetcht0 (%rdi,%rax,4)
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;CHECK-NEXT: movl (%rdi,%rax,4), %eax
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;CHECK-NEXT: .loc 1 2 20 discriminator 2 # test.cc:2:20
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;CHECK-NEXT: addl (%rdi,%rcx,4), %eax
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;CHECK-NEXT: .loc 1 2 3 # test.cc:2:3
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;NOBYPASS-LABEL: sum:
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;NOBYPASS: # %bb.0:
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;NOBYPASS: prefetcht0 (%rdi,%rax,4)
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;NOBYPASS-NEXT: .loc 1 2 22
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;NOBYPASS-NEXT: movl (%rdi,%rax,4), %eax
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;NOBYPASS-NEXT: .loc 1 2 20 {{.*}} discriminator 2 # test.cc:2:20
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;NOBYPASS-NEXT: addl (%rdi,%rcx,4), %eax
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;NOBYPASS-NEXT: .loc 1 2 3 # test.cc:2:3
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