| # RUN: llc -o - %s -run-pass=shrink-wrap | FileCheck %s |
| --- | |
| ; ModuleID = '<stdin>' |
| 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 @"@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 |
| %0 = add i32 %c, -1, !dbg !30 |
| br label %for.cond, !dbg !30 |
| |
| for.cond: ; preds = %for.cond, %for.cond.preheader |
| %lsr.iv = phi i32 [ %lsr.iv.next, %for.cond ], [ %0, %for.cond.preheader ] |
| call void @llvm.dbg.value(metadata i32 undef, metadata !17, metadata !DIExpression()), !dbg !32 |
| 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 |
| call void @llvm.dbg.value(metadata !2, metadata !17, metadata !DIExpression()), !dbg !32 |
| %lsr.iv.next = add i32 %lsr.iv, 1, !dbg !30 |
| %cmp1 = icmp slt i32 %lsr.iv.next, %d, !dbg !30 |
| br i1 %cmp1, label %for.cond, label %return, !dbg !34, !llvm.loop !35 |
| |
| return: ; preds = %for.cond, %entry |
| %retval.0 = phi i32 [ %a, %entry ], [ %call, %for.cond ] |
| ret i32 %retval.0, !dbg !37 |
| } |
| |
| declare i32 @doSomething(i32*) local_unnamed_addr |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(i8*, i8**) #3 |
| |
| attributes #0 = { nounwind } |
| 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: 3, scope: !18) |
| !35 = distinct !{!35, !34, !36} |
| !36 = !DILocation(line: 6, column: 19, scope: !18) |
| !37 = !DILocation(line: 8, column: 1, scope: !8) |
| |
| ... |
| --- |
| name: '@shrink_wrap_basic@16' |
| alignment: 16 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| tracksRegLiveness: true |
| registers: |
| liveins: |
| - { reg: '$ecx', virtual-reg: '' } |
| - { reg: '$edx', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 0 |
| offsetAdjustment: 0 |
| maxAlignment: 4 |
| adjustsStack: false |
| hasCalls: true |
| stackProtector: '' |
| maxCallFrameSize: 4294967295 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| # CHECK: savePoint: '%bb.1' |
| # CHECK: restorePoint: '%bb.3' |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: |
| - { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default, |
| isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true } |
| - { id: 1, type: default, offset: 0, size: 4, alignment: 4, stack-id: default, |
| isImmutable: false, isAliased: false, callee-saved-register: '', |
| callee-saved-restored: true } |
| stack: |
| constants: |
| body: | |
| bb.0.entry: |
| successors: %bb.4(0x40000000), %bb.1(0x40000000) |
| liveins: $ecx, $edx |
| |
| DBG_VALUE $edx, $noreg, !15, !DIExpression(), debug-location !25 |
| DBG_VALUE $ecx, $noreg, !16, !DIExpression(), debug-location !26 |
| $eax = COPY $ecx |
| DBG_VALUE %fixed-stack.0, 0, !16, !DIExpression(), debug-location !26 |
| DBG_VALUE %fixed-stack.1, 0, !15, !DIExpression(), debug-location !25 |
| CMP32rr $eax, killed $edx, implicit-def $eflags, debug-location !27 |
| JCC_1 %bb.4, 12, implicit killed $eflags, debug-location !29 |
| JMP_1 %bb.1, debug-location !29 |
| |
| bb.1.for.cond.preheader: |
| successors: %bb.2(0x80000000) |
| |
| $esi = MOV32rm %fixed-stack.0, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.0) |
| DBG_VALUE $esi, $noreg, !13, !DIExpression(), debug-location !19 |
| $edi = MOV32rm %fixed-stack.1, 1, $noreg, 0, $noreg :: (load 4 from %fixed-stack.1) |
| DBG_VALUE $edi, $noreg, !14, !DIExpression(), debug-location !20 |
| $edi = DEC32r killed $edi, implicit-def dead $eflags, debug-location !30 |
| $ebx = LEA32r %fixed-stack.1, 1, $noreg, 0, $noreg |
| |
| bb.2.for.cond: |
| successors: %bb.2(0x7c000000), %bb.3(0x04000000) |
| liveins: $ebx, $edi, $esi |
| |
| ADJCALLSTACKDOWN32 4, 0, 4, implicit-def dead $esp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $esp, implicit $ssp, debug-location !33 |
| DBG_VALUE %fixed-stack.1, 0, !14, !DIExpression(), debug-location !20 |
| PUSH32r $ebx, implicit-def $esp, implicit $esp, debug-location !33 |
| CFI_INSTRUCTION adjust_cfa_offset 4, debug-location !33 |
| CALLpcrel32 @doSomething, csr_32, implicit $esp, implicit $ssp, implicit-def $esp, implicit-def $ssp, implicit-def $eax, debug-location !33 |
| ADJCALLSTACKUP32 4, 0, implicit-def dead $esp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $esp, implicit $ssp, debug-location !33 |
| $edi = INC32r killed $edi, implicit-def dead $eflags, debug-location !30 |
| CMP32rr $edi, $esi, implicit-def $eflags, debug-location !30 |
| JCC_1 %bb.2, 12, implicit killed $eflags, debug-location !34 |
| |
| bb.3: |
| successors: %bb.4(0x80000000) |
| liveins: $eax |
| |
| |
| bb.4.return: |
| liveins: $eax |
| |
| RET 8, $eax, debug-location !37 |
| |
| ... |
