| ; RUN: opt -O2 -march=bpfeb < %s | llvm-dis | FileCheck %s |
| ; RUN: opt -O2 -march=bpfel < %s | llvm-dis | FileCheck %s |
| ; |
| ; Source code: |
| ; #define _(x) (__builtin_preserve_access_index(x)) |
| ; int get_value(const int *arg); |
| ; int test(int b, int *arg) { |
| ; int v1 = b ? get_value(_(&arg[4])) : 0; |
| ; int v2 = b ? get_value(_(&arg[4])) : 0; |
| ; return v1 + v2; |
| ; } |
| ; Compilation flag: |
| ; clang -target bpf -O0 -g -S -emit-llvm -Xclang -disable-O0-optnone test.c |
| |
| ; Function Attrs: noinline nounwind |
| define dso_local i32 @test(i32 %b, i32* %arg) #0 !dbg !10 { |
| entry: |
| %b.addr = alloca i32, align 4 |
| %arg.addr = alloca i32*, align 8 |
| %v1 = alloca i32, align 4 |
| %v2 = alloca i32, align 4 |
| store i32 %b, i32* %b.addr, align 4 |
| call void @llvm.dbg.declare(metadata i32* %b.addr, metadata !13, metadata !DIExpression()), !dbg !14 |
| store i32* %arg, i32** %arg.addr, align 8 |
| call void @llvm.dbg.declare(metadata i32** %arg.addr, metadata !15, metadata !DIExpression()), !dbg !16 |
| call void @llvm.dbg.declare(metadata i32* %v1, metadata !17, metadata !DIExpression()), !dbg !18 |
| %0 = load i32, i32* %b.addr, align 4, !dbg !19 |
| %tobool = icmp ne i32 %0, 0, !dbg !19 |
| br i1 %tobool, label %cond.true, label %cond.false, !dbg !19 |
| |
| cond.true: ; preds = %entry |
| %1 = load i32*, i32** %arg.addr, align 8, !dbg !20 |
| %2 = call i32* @llvm.preserve.array.access.index.p0i32.p0i32(i32* %1, i32 0, i32 4), !dbg !20, !llvm.preserve.access.index !4 |
| %3 = bitcast i32* %2 to i8*, !dbg !20 |
| %4 = bitcast i8* %3 to i32*, !dbg !20 |
| %call = call i32 @get_value(i32* %4), !dbg !21 |
| br label %cond.end, !dbg !19 |
| |
| cond.false: ; preds = %entry |
| br label %cond.end, !dbg !19 |
| |
| cond.end: ; preds = %cond.false, %cond.true |
| %cond = phi i32 [ %call, %cond.true ], [ 0, %cond.false ], !dbg !19 |
| store i32 %cond, i32* %v1, align 4, !dbg !18 |
| call void @llvm.dbg.declare(metadata i32* %v2, metadata !22, metadata !DIExpression()), !dbg !23 |
| %5 = load i32, i32* %b.addr, align 4, !dbg !24 |
| %tobool1 = icmp ne i32 %5, 0, !dbg !24 |
| br i1 %tobool1, label %cond.true2, label %cond.false4, !dbg !24 |
| |
| cond.true2: ; preds = %cond.end |
| %6 = load i32*, i32** %arg.addr, align 8, !dbg !25 |
| %7 = call i32* @llvm.preserve.array.access.index.p0i32.p0i32(i32* %6, i32 0, i32 4), !dbg !25, !llvm.preserve.access.index !4 |
| %8 = bitcast i32* %7 to i8*, !dbg !25 |
| %9 = bitcast i8* %8 to i32*, !dbg !25 |
| %call3 = call i32 @get_value(i32* %9), !dbg !26 |
| br label %cond.end5, !dbg !24 |
| |
| ; CHECK: tail call i32* @llvm.preserve.array.access.index.p0i32.p0i32(i32* %{{[0-9a-z]+}}, i32 0, i32 4), !dbg !{{[0-9]+}}, !llvm.preserve.access.index !{{[0-9]+}} |
| ; CHECK-NOT: tail call i32* @llvm.preserve.array.access.index |
| |
| cond.false4: ; preds = %cond.end |
| br label %cond.end5, !dbg !24 |
| |
| cond.end5: ; preds = %cond.false4, %cond.true2 |
| %cond6 = phi i32 [ %call3, %cond.true2 ], [ 0, %cond.false4 ], !dbg !24 |
| store i32 %cond6, i32* %v2, align 4, !dbg !23 |
| %10 = load i32, i32* %v1, align 4, !dbg !27 |
| %11 = load i32, i32* %v2, align 4, !dbg !28 |
| %add = add nsw i32 %10, %11, !dbg !29 |
| ret i32 %add, !dbg !30 |
| } |
| |
| ; Function Attrs: nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| declare dso_local i32 @get_value(i32*) #2 |
| |
| ; Function Attrs: nounwind readnone |
| declare i32* @llvm.preserve.array.access.index.p0i32.p0i32(i32*, i32 immarg, i32 immarg) #3 |
| |
| attributes #0 = { noinline nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { nounwind readnone speculatable willreturn } |
| attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #3 = { nounwind readnone } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!6, !7, !8} |
| !llvm.ident = !{!9} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4618b07fe2cede1b73512d1c260cf4981661f47f)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None) |
| !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64) |
| !5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !6 = !{i32 2, !"Dwarf Version", i32 4} |
| !7 = !{i32 2, !"Debug Info Version", i32 3} |
| !8 = !{i32 1, !"wchar_size", i32 4} |
| !9 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4618b07fe2cede1b73512d1c260cf4981661f47f)"} |
| !10 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 3, type: !11, scopeLine: 3, flags: DIFlagPrototyped, isDefinition: true, unit: !0, retainedNodes: !2) |
| !11 = !DISubroutineType(types: !12) |
| !12 = !{!5, !5, !4} |
| !13 = !DILocalVariable(name: "b", arg: 1, scope: !10, file: !1, line: 3, type: !5) |
| !14 = !DILocation(line: 3, column: 14, scope: !10) |
| !15 = !DILocalVariable(name: "arg", arg: 2, scope: !10, file: !1, line: 3, type: !4) |
| !16 = !DILocation(line: 3, column: 22, scope: !10) |
| !17 = !DILocalVariable(name: "v1", scope: !10, file: !1, line: 4, type: !5) |
| !18 = !DILocation(line: 4, column: 7, scope: !10) |
| !19 = !DILocation(line: 4, column: 12, scope: !10) |
| !20 = !DILocation(line: 4, column: 26, scope: !10) |
| !21 = !DILocation(line: 4, column: 16, scope: !10) |
| !22 = !DILocalVariable(name: "v2", scope: !10, file: !1, line: 5, type: !5) |
| !23 = !DILocation(line: 5, column: 7, scope: !10) |
| !24 = !DILocation(line: 5, column: 12, scope: !10) |
| !25 = !DILocation(line: 5, column: 26, scope: !10) |
| !26 = !DILocation(line: 5, column: 16, scope: !10) |
| !27 = !DILocation(line: 6, column: 10, scope: !10) |
| !28 = !DILocation(line: 6, column: 15, scope: !10) |
| !29 = !DILocation(line: 6, column: 13, scope: !10) |
| !30 = !DILocation(line: 6, column: 3, scope: !10) |