| ; RUN: llc -enable-shrink-wrap=true < %s | FileCheck %s --check-prefix=ASM |
| ; RUN: llc -enable-shrink-wrap=true -filetype=obj < %s | llvm-readobj -codeview | FileCheck %s --check-prefix=OBJ |
| |
| ; C source: |
| ; int doSomething(int*); |
| ; int __fastcall shrink_wrap_basic(int a, int b, int c, int d) { |
| ; if (a < b) |
| ; return a; |
| ; for (int i = c; i < d; ++i) |
| ; doSomething(&c); |
| ; return doSomething(&c); |
| ; } |
| |
| ; ASM: @shrink_wrap_basic@16: # @"\01@shrink_wrap_basic@16" |
| ; ASM: .cv_fpo_proc @shrink_wrap_basic@16 8 |
| ; ASM: .cv_loc 0 1 3 9 # t.c:3:9 |
| ; ASM: movl %ecx, %eax |
| ; ASM: cmpl %edx, %ecx |
| ; ASM: jl [[EPILOGUE:LBB0_[0-9]+]] |
| |
| ; ASM: pushl %ebx |
| ; ASM: .cv_fpo_pushreg %ebx |
| ; ASM: pushl %edi |
| ; ASM: .cv_fpo_pushreg %edi |
| ; ASM: pushl %esi |
| ; ASM: .cv_fpo_pushreg %esi |
| ; ASM: .cv_fpo_endprologue |
| |
| ; ASM: calll _doSomething |
| |
| ; ASM: popl %esi |
| ; ASM: popl %edi |
| ; ASM: popl %ebx |
| ; ASM: [[EPILOGUE]]: # %return |
| ; ASM: retl $8 |
| ; ASM: Ltmp11: |
| ; ASM: .cv_fpo_endproc |
| |
| ; Note how RvaStart advances 7 bytes to skip the shrink-wrapped portion. |
| ; OBJ: SubSectionType: FrameData (0xF5) |
| ; OBJ: FrameData { |
| ; OBJ: RvaStart: 0x0 |
| ; OBJ: CodeSize: 0x34 |
| ; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = |
| ; OBJ: PrologSize: 0x9 |
| ; OBJ: } |
| ; OBJ: FrameData { |
| ; OBJ: RvaStart: 0x7 |
| ; OBJ: CodeSize: 0x2D |
| ; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = $ebx $T0 4 - ^ = |
| ; OBJ: PrologSize: 0x2 |
| ; OBJ: } |
| ; OBJ: FrameData { |
| ; OBJ: RvaStart: 0x8 |
| ; OBJ: CodeSize: 0x2C |
| ; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = $ebx $T0 4 - ^ = $edi $T0 8 - ^ = |
| ; OBJ: PrologSize: 0x1 |
| ; OBJ: } |
| ; OBJ: FrameData { |
| ; OBJ: RvaStart: 0x9 |
| ; OBJ: CodeSize: 0x2B |
| ; OBJ: FrameFunc: $T0 .raSearch = $eip $T0 ^ = $esp $T0 4 + = $ebx $T0 4 - ^ = $edi $T0 8 - ^ = $esi $T0 12 - ^ = |
| ; OBJ: PrologSize: 0x0 |
| ; OBJ: } |
| ; OBJ-NOT: FrameData |
| |
| ; ModuleID = 't.c' |
| source_filename = "t.c" |
| target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" |
| target triple = "i386-pc-windows-msvc19.11.25508" |
| |
| ; Function Attrs: nounwind |
| define x86_fastcallcc i32 @"\01@shrink_wrap_basic@16"(i32 inreg %a, i32 inreg %b, i32 %c, i32 %d) local_unnamed_addr #0 !dbg !8 { |
| entry: |
| %c.addr = alloca i32, align 4 |
| tail call void @llvm.dbg.value(metadata i32 %d, metadata !13, metadata !DIExpression()), !dbg !19 |
| tail call void @llvm.dbg.value(metadata i32 %c, metadata !14, metadata !DIExpression()), !dbg !20 |
| store i32 %c, i32* %c.addr, align 4, !tbaa !21 |
| tail call void @llvm.dbg.value(metadata i32 %b, metadata !15, metadata !DIExpression()), !dbg !25 |
| tail call void @llvm.dbg.value(metadata i32 %a, metadata !16, metadata !DIExpression()), !dbg !26 |
| %cmp = icmp slt i32 %a, %b, !dbg !27 |
| br i1 %cmp, label %return, label %for.cond.preheader, !dbg !29 |
| |
| for.cond.preheader: ; preds = %entry |
| br label %for.cond, !dbg !30 |
| |
| for.cond: ; preds = %for.cond.preheader, %for.cond |
| %i.0 = phi i32 [ %inc, %for.cond ], [ %c, %for.cond.preheader ] |
| call void @llvm.dbg.value(metadata i32 %i.0, metadata !17, metadata !DIExpression()), !dbg !32 |
| %cmp1 = icmp slt i32 %i.0, %d, !dbg !30 |
| call void @llvm.dbg.value(metadata i32* %c.addr, metadata !14, metadata !DIExpression()), !dbg !20 |
| %call = call i32 @doSomething(i32* nonnull %c.addr) #3, !dbg !33 |
| %inc = add nsw i32 %i.0, 1, !dbg !34 |
| call void @llvm.dbg.value(metadata i32 %inc, metadata !17, metadata !DIExpression()), !dbg !32 |
| br i1 %cmp1, label %for.cond, label %return, !dbg !35, !llvm.loop !36 |
| |
| return: ; preds = %for.cond, %entry |
| %retval.0 = phi i32 [ %a, %entry ], [ %call, %for.cond ] |
| ret i32 %retval.0, !dbg !38 |
| } |
| |
| declare i32 @doSomething(i32*) local_unnamed_addr #1 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #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" } |
| attributes #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" } |
| attributes #2 = { nounwind readnone speculatable } |
| attributes #3 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "32f118fd5dd7e65ff7733c49b2f804ef") |
| !2 = !{} |
| !3 = !{i32 1, !"NumRegisterParameters", i32 0} |
| !4 = !{i32 2, !"CodeView", i32 1} |
| !5 = !{i32 2, !"Debug Info Version", i32 3} |
| !6 = !{i32 1, !"wchar_size", i32 2} |
| !7 = !{!"clang version 6.0.0 "} |
| !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) |
| !9 = !DISubroutineType(cc: DW_CC_BORLAND_msfastcall, types: !10) |
| !10 = !{!11, !11, !11, !11, !11} |
| !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !12 = !{!13, !14, !15, !16, !17} |
| !13 = !DILocalVariable(name: "d", arg: 4, scope: !8, file: !1, line: 2, type: !11) |
| !14 = !DILocalVariable(name: "c", arg: 3, scope: !8, file: !1, line: 2, type: !11) |
| !15 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 2, type: !11) |
| !16 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 2, type: !11) |
| !17 = !DILocalVariable(name: "i", scope: !18, file: !1, line: 5, type: !11) |
| !18 = distinct !DILexicalBlock(scope: !8, file: !1, line: 5, column: 3) |
| !19 = !DILocation(line: 2, column: 59, scope: !8) |
| !20 = !DILocation(line: 2, column: 52, scope: !8) |
| !21 = !{!22, !22, i64 0} |
| !22 = !{!"int", !23, i64 0} |
| !23 = !{!"omnipotent char", !24, i64 0} |
| !24 = !{!"Simple C/C++ TBAA"} |
| !25 = !DILocation(line: 2, column: 45, scope: !8) |
| !26 = !DILocation(line: 2, column: 38, scope: !8) |
| !27 = !DILocation(line: 3, column: 9, scope: !28) |
| !28 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7) |
| !29 = !DILocation(line: 3, column: 7, scope: !8) |
| !30 = !DILocation(line: 5, column: 21, scope: !31) |
| !31 = distinct !DILexicalBlock(scope: !18, file: !1, line: 5, column: 3) |
| !32 = !DILocation(line: 5, column: 12, scope: !18) |
| !33 = !DILocation(line: 0, scope: !8) |
| !34 = !DILocation(line: 5, column: 26, scope: !31) |
| !35 = !DILocation(line: 5, column: 3, scope: !18) |
| !36 = distinct !{!36, !35, !37} |
| !37 = !DILocation(line: 6, column: 19, scope: !18) |
| !38 = !DILocation(line: 8, column: 1, scope: !8) |
