carbon-lang/toolchain/lower/testdata/pointer/basic.carbon

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/pointer/basic.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/pointer/basic.carbon

fn G(p: i32*) -> i32 {
  return *p;
}

fn F() -> i32 {
  var n: i32 = 0;
  return G(&n);
}

// CHECK:STDOUT: ; ModuleID = 'basic.carbon'
// CHECK:STDOUT: source_filename = "basic.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CG.Main(ptr %p) #0 !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.loc14_10.2 = load i32, ptr %p, align 4, !dbg !11
// CHECK:STDOUT:   ret i32 %.loc14_10.2, !dbg !12
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nounwind
// CHECK:STDOUT: define i32 @_CF.Main() #0 !dbg !13 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %n.var = alloca i32, align 4, !dbg !16
// CHECK:STDOUT:   call void @llvm.lifetime.start.p0(ptr %n.var), !dbg !16
// CHECK:STDOUT:   store i32 0, ptr %n.var, align 4, !dbg !16
// CHECK:STDOUT:   %G.call = call i32 @_CG.Main(ptr %n.var), !dbg !17
// CHECK:STDOUT:   ret i32 %G.call, !dbg !18
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nounwind }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "basic.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "G", linkageName: "_CG.Main", scope: null, file: !3, line: 13, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !9)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{!7, !8}
// CHECK:STDOUT: !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
// CHECK:STDOUT: !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
// CHECK:STDOUT: !9 = !{!10}
// CHECK:STDOUT: !10 = !DILocalVariable(arg: 1, scope: !4, type: !8)
// CHECK:STDOUT: !11 = !DILocation(line: 14, column: 10, scope: !4)
// CHECK:STDOUT: !12 = !DILocation(line: 14, column: 3, scope: !4)
// CHECK:STDOUT: !13 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 17, type: !14, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !14 = !DISubroutineType(types: !15)
// CHECK:STDOUT: !15 = !{!7}
// CHECK:STDOUT: !16 = !DILocation(line: 18, column: 3, scope: !13)
// CHECK:STDOUT: !17 = !DILocation(line: 19, column: 10, scope: !13)
// CHECK:STDOUT: !18 = !DILocation(line: 19, column: 3, scope: !13)