1; RUN: opt -passes=simplifycfg -S < %s | FileCheck %s 2; 3; Simplified from the following code: 4; int foo() { 5; if(c) { return a; } else { return b; } 6; } 7define i32 @foo(i32 %c, i32 %a, i32 %b) !dbg !4 { 8; CHECK: define i32 @foo({{.*}}) !dbg [[FOO_SUBPROGRAM:![0-9]+]] 9; CHECK-NEXT: entry: 10; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i32 [[C:%.*]], 0, !dbg [[DBG_CMP:![0-9]+]] 11; CHECK-NEXT: [[A_B:%.*]] = select i1 [[TOBOOL]], i32 [[A:%.*]], i32 [[B:%.*]] 12; CHECK-NEXT: ret i32 [[A_B]], !dbg [[DBG_RET:![0-9]+]] 13; CHECK: [[DBG_CMP]] = !DILocation(line: 2, column: 1, scope: [[FOO_SUBPROGRAM]]) 14; CHECK: [[DBG_RET]] = !DILocation(line: 4, scope: [[FOO_SUBPROGRAM]]) 15entry: 16 %tobool = icmp ne i32 %c, 0, !dbg !7 17 br i1 %tobool, label %cond.true, label %cond.false, !dbg !8 18 19cond.true: ; preds = %entry 20 ret i32 %a, !dbg !9 21 22cond.false: ; preds = %entry 23 ret i32 %b, !dbg !10 24} 25 26!llvm.dbg.cu = !{!0} 27!llvm.module.flags = !{!2, !3} 28 29!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 16.0.0)", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, nameTableKind: None) 30!1 = !DIFile(filename: "test.c", directory: "/") 31!2 = !{i32 7, !"Dwarf Version", i32 5} 32!3 = !{i32 2, !"Debug Info Version", i32 3} 33!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !6) 34!5 = !DISubroutineType(types: !6) 35!6 = !{} 36!7 = !DILocation(line: 2, column: 1, scope: !4) 37!8 = !DILocation(line: 3, column: 1, scope: !4) 38!9 = !DILocation(line: 4, column: 1, scope: !4) 39!10 = !DILocation(line: 4, column: 2, scope: !4) 40