1; RUN: llc -enable-shrink-wrap=true < %s | FileCheck %s --check-prefix=ASM 2; RUN: llc -enable-shrink-wrap=true -filetype=obj < %s | llvm-readobj -codeview | FileCheck %s --check-prefix=OBJ 3 4; C source: 5; int doSomething(int*); 6; int __fastcall shrink_wrap_basic(int a, int b, int c, int d) { 7; if (a < b) 8; return a; 9; for (int i = c; i < d; ++i) 10; doSomething(&c); 11; return doSomething(&c); 12; } 13 14; ASM: @shrink_wrap_basic@16: # @"\01@shrink_wrap_basic@16" 15; ASM: .cv_fpo_proc @shrink_wrap_basic@16 8 16; ASM: .cv_loc 0 1 3 9 # t.c:3:9 17; ASM: movl %ecx, %eax 18; ASM: cmpl %edx, %ecx 19; ASM: jl [[EPILOGUE:LBB0_[0-9]+]] 20 21; ASM: pushl %ebx 22; ASM: .cv_fpo_pushreg %ebx 23; ASM: pushl %edi 24; ASM: .cv_fpo_pushreg %edi 25; ASM: pushl %esi 26; ASM: .cv_fpo_pushreg %esi 27; ASM: .cv_fpo_endprologue 28 29; ASM: calll _doSomething 30 31; ASM: popl %esi 32; ASM: popl %edi 33; ASM: popl %ebx 34; ASM: [[EPILOGUE]]: # %return 35; ASM: retl $8 36; ASM: Ltmp11: 37; ASM: .cv_fpo_endproc 38 39; Note how RvaStart advances 7 bytes to skip the shrink-wrapped portion. 40; OBJ: SubSectionType: FrameData (0xF5) 41; OBJ: FrameData { 42; OBJ: RvaStart: 0x0 43; OBJ: CodeSize: 0x34 44; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = 45; OBJ: PrologSize: 0x9 46; OBJ: } 47; OBJ: FrameData { 48; OBJ: RvaStart: 0x7 49; OBJ: CodeSize: 0x2D 50; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = $ebx $T0 4 - ^ = 51; OBJ: PrologSize: 0x2 52; OBJ: } 53; OBJ: FrameData { 54; OBJ: RvaStart: 0x8 55; OBJ: CodeSize: 0x2C 56; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = $ebx $T0 4 - ^ = $edi $T0 8 - ^ = 57; OBJ: PrologSize: 0x1 58; OBJ: } 59; OBJ: FrameData { 60; OBJ: RvaStart: 0x9 61; OBJ: CodeSize: 0x2B 62; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = $ebx $T0 4 - ^ = $edi $T0 8 - ^ = $esi $T0 12 - ^ = 63; OBJ: PrologSize: 0x0 64; OBJ: } 65; OBJ-NOT: FrameData 66 67; ModuleID = 't.c' 68source_filename = "t.c" 69target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 70target triple = "i386-pc-windows-msvc19.11.25508" 71 72; Function Attrs: nounwind 73define x86_fastcallcc i32 @"\01@shrink_wrap_basic@16"(i32 inreg %a, i32 inreg %b, i32 %c, i32 %d) local_unnamed_addr #0 !dbg !8 { 74entry: 75 %c.addr = alloca i32, align 4 76 tail call void @llvm.dbg.value(metadata i32 %d, metadata !13, metadata !DIExpression()), !dbg !19 77 tail call void @llvm.dbg.value(metadata i32 %c, metadata !14, metadata !DIExpression()), !dbg !20 78 store i32 %c, i32* %c.addr, align 4, !tbaa !21 79 tail call void @llvm.dbg.value(metadata i32 %b, metadata !15, metadata !DIExpression()), !dbg !25 80 tail call void @llvm.dbg.value(metadata i32 %a, metadata !16, metadata !DIExpression()), !dbg !26 81 %cmp = icmp slt i32 %a, %b, !dbg !27 82 br i1 %cmp, label %return, label %for.cond.preheader, !dbg !29 83 84for.cond.preheader: ; preds = %entry 85 br label %for.cond, !dbg !30 86 87for.cond: ; preds = %for.cond.preheader, %for.cond 88 %i.0 = phi i32 [ %inc, %for.cond ], [ %c, %for.cond.preheader ] 89 call void @llvm.dbg.value(metadata i32 %i.0, metadata !17, metadata !DIExpression()), !dbg !32 90 %cmp1 = icmp slt i32 %i.0, %d, !dbg !30 91 call void @llvm.dbg.value(metadata i32* %c.addr, metadata !14, metadata !DIExpression()), !dbg !20 92 %call = call i32 @doSomething(i32* nonnull %c.addr) #3, !dbg !33 93 %inc = add nsw i32 %i.0, 1, !dbg !34 94 call void @llvm.dbg.value(metadata i32 %inc, metadata !17, metadata !DIExpression()), !dbg !32 95 br i1 %cmp1, label %for.cond, label %return, !dbg !35, !llvm.loop !36 96 97return: ; preds = %for.cond, %entry 98 %retval.0 = phi i32 [ %a, %entry ], [ %call, %for.cond ] 99 ret i32 %retval.0, !dbg !38 100} 101 102declare i32 @doSomething(i32*) local_unnamed_addr #1 103 104; Function Attrs: nounwind readnone speculatable 105declare void @llvm.dbg.value(metadata, metadata, metadata) #2 106 107attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 108attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="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" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 109attributes #2 = { nounwind readnone speculatable } 110attributes #3 = { nounwind } 111 112!llvm.dbg.cu = !{!0} 113!llvm.module.flags = !{!3, !4, !5, !6} 114!llvm.ident = !{!7} 115 116!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 117!1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "32f118fd5dd7e65ff7733c49b2f804ef") 118!2 = !{} 119!3 = !{i32 1, !"NumRegisterParameters", i32 0} 120!4 = !{i32 2, !"CodeView", i32 1} 121!5 = !{i32 2, !"Debug Info Version", i32 3} 122!6 = !{i32 1, !"wchar_size", i32 2} 123!7 = !{!"clang version 6.0.0 "} 124!8 = distinct !DISubprogram(name: "shrink_wrap_basic", linkageName: "\01@shrink_wrap_basic@16", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12) 125!9 = !DISubroutineType(cc: DW_CC_BORLAND_msfastcall, types: !10) 126!10 = !{!11, !11, !11, !11, !11} 127!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 128!12 = !{!13, !14, !15, !16, !17} 129!13 = !DILocalVariable(name: "d", arg: 4, scope: !8, file: !1, line: 2, type: !11) 130!14 = !DILocalVariable(name: "c", arg: 3, scope: !8, file: !1, line: 2, type: !11) 131!15 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 2, type: !11) 132!16 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 2, type: !11) 133!17 = !DILocalVariable(name: "i", scope: !18, file: !1, line: 5, type: !11) 134!18 = distinct !DILexicalBlock(scope: !8, file: !1, line: 5, column: 3) 135!19 = !DILocation(line: 2, column: 59, scope: !8) 136!20 = !DILocation(line: 2, column: 52, scope: !8) 137!21 = !{!22, !22, i64 0} 138!22 = !{!"int", !23, i64 0} 139!23 = !{!"omnipotent char", !24, i64 0} 140!24 = !{!"Simple C/C++ TBAA"} 141!25 = !DILocation(line: 2, column: 45, scope: !8) 142!26 = !DILocation(line: 2, column: 38, scope: !8) 143!27 = !DILocation(line: 3, column: 9, scope: !28) 144!28 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7) 145!29 = !DILocation(line: 3, column: 7, scope: !8) 146!30 = !DILocation(line: 5, column: 21, scope: !31) 147!31 = distinct !DILexicalBlock(scope: !18, file: !1, line: 5, column: 3) 148!32 = !DILocation(line: 5, column: 12, scope: !18) 149!33 = !DILocation(line: 0, scope: !8) 150!34 = !DILocation(line: 5, column: 26, scope: !31) 151!35 = !DILocation(line: 5, column: 3, scope: !18) 152!36 = distinct !{!36, !35, !37} 153!37 = !DILocation(line: 6, column: 19, scope: !18) 154!38 = !DILocation(line: 8, column: 1, scope: !8) 155