1 ; RUN: llc -x86-discriminate-memops < %s | FileCheck %s
2 ; RUN: llc -x86-discriminate-memops -x86-bypass-prefetch-instructions=0 < %s | FileCheck %s -check-prefix=NOBYPASS
4 ; original source, compiled with -O3 -gmlt -fdebug-info-for-profiling:
5 ; int sum(int* arr, int pos1, int pos2) {
6 ; return arr[pos1] + arr[pos2];
10 source_filename = "test.cc"
11 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-unknown-linux-gnu"
14 declare void @llvm.prefetch(i8 *, i32, i32, i32)
15 ; Function Attrs: norecurse nounwind readonly uwtable
16 define i32 @sum(i32* %arr, i32 %pos1, i32 %pos2) !dbg !7 {
18 %idxprom = sext i32 %pos1 to i64, !dbg !9
19 %arrayidx = getelementptr inbounds i32, i32* %arr, i64 %idxprom, !dbg !9
20 %0 = load i32, i32* %arrayidx, align 4, !dbg !9, !tbaa !10
21 %idxprom1 = sext i32 %pos2 to i64, !dbg !14
22 %arrayidx2 = getelementptr inbounds i32, i32* %arr, i64 %idxprom1, !dbg !14
23 %addr = bitcast i32* %arrayidx2 to i8*
24 call void @llvm.prefetch(i8* %addr, i32 0, i32 3, i32 1)
25 %1 = load i32, i32* %arrayidx2, align 4, !dbg !14, !tbaa !10
26 %add = add nsw i32 %1, %0, !dbg !15
27 ret i32 %add, !dbg !16
30 attributes #0 = { "target-cpu"="x86-64" }
33 !llvm.module.flags = !{!3, !4, !5}
36 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, debugInfoForProfiling: true)
37 !1 = !DIFile(filename: "test.cc", directory: "/tmp")
39 !3 = !{i32 2, !"Dwarf Version", i32 4}
40 !4 = !{i32 2, !"Debug Info Version", i32 3}
41 !5 = !{i32 1, !"wchar_size", i32 4}
42 !6 = !{!"clang version 7.0.0 (trunk 322155) (llvm/trunk 322159)"}
43 !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)
44 !8 = !DISubroutineType(types: !2)
45 !9 = !DILocation(line: 2, column: 10, scope: !7)
46 !10 = !{!11, !11, i64 0}
47 !11 = !{!"int", !12, i64 0}
48 !12 = !{!"omnipotent char", !13, i64 0}
49 !13 = !{!"Simple C++ TBAA"}
50 !14 = !DILocation(line: 2, column: 22, scope: !7)
51 !15 = !DILocation(line: 2, column: 20, scope: !7)
52 !16 = !DILocation(line: 2, column: 3, scope: !7)
56 ;CHECK: prefetcht0 (%rdi,%rax,4)
57 ;CHECK-NEXT: movl (%rdi,%rax,4), %eax
58 ;CHECK-NEXT: .loc 1 2 20 discriminator 2 # test.cc:2:20
59 ;CHECK-NEXT: addl (%rdi,%rcx,4), %eax
60 ;CHECK-NEXT: .loc 1 2 3 # test.cc:2:3
64 ;NOBYPASS: prefetcht0 (%rdi,%rax,4)
65 ;NOBYPASS-NEXT: .loc 1 2 22
66 ;NOBYPASS-NEXT: movl (%rdi,%rax,4), %eax
67 ;NOBYPASS-NEXT: .loc 1 2 20 {{.*}} discriminator 2 # test.cc:2:20
68 ;NOBYPASS-NEXT: addl (%rdi,%rcx,4), %eax
69 ;NOBYPASS-NEXT: .loc 1 2 3 # test.cc:2:3