d391e4fe84
Be more consistent in the naming convention for the various RET instructions to specify in terms of bitwidth. Helps prevent future scheduler model mismatches like those that were only addressed in D44687. Differential Revision: https://reviews.llvm.org/D113302
168 lines
7.6 KiB
YAML
168 lines
7.6 KiB
YAML
# RUN: llc -emit-call-site-info -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
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## Compiled from source:
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## __attribute__((noinline))
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## int foo (int x, int y, int a) {
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## int i;
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## for (i = 0; i < x * y; i++) {
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## if (i < x) {
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## a = a * x;
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## break;
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## }
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## }
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## return a;
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## }
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## Using commands:
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## $ clang -g -O1 test.c -emit-llvm -S -o test.ll
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## $ llc -emit-call-site-info -stop-after stackmap-liveness test.ll -o test.mir
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## Artificially added DBG_VALUE $esi, $noreg, !14, !DIExpression() into
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## for.cond Basic Block to prevent further usage of Entry Value in the loop.
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# CHECK: ![[ARG_Y:.*]] = !DILocalVariable(name: "y"
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# CHECK: for.cond:
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# CHECK: DBG_VALUE $esi, $noreg, ![[ARG_Y]], !DIExpression()
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# CHECK-NOT: DBG_VALUE $esi, $noreg, ![[ARG_Y]], !DIExpression(DW_OP_LLVM_entry_value, 1)
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--- |
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; ModuleID = 'test.ll'
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source_filename = "test.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nofree noinline norecurse nosync nounwind readnone uwtable
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define dso_local i32 @foo(i32 %x, i32 %y, i32 %a) local_unnamed_addr !dbg !8 {
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entry:
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call void @llvm.dbg.value(metadata i32 %x, metadata !13, metadata !DIExpression()), !dbg !17
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call void @llvm.dbg.value(metadata i32 %y, metadata !14, metadata !DIExpression()), !dbg !17
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call void @llvm.dbg.value(metadata i32 %a, metadata !15, metadata !DIExpression()), !dbg !17
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call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !17
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%mul = mul nsw i32 %y, %x
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call void @llvm.dbg.value(metadata i32 0, metadata !16, metadata !DIExpression()), !dbg !17
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%cmp9 = icmp sgt i32 %mul, 0, !dbg !18
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br i1 %cmp9, label %for.body.preheader, label %for.end, !dbg !21
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for.body.preheader: ; preds = %entry
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%0 = mul i32 %y, %x, !dbg !21
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br label %for.body, !dbg !21
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for.cond: ; preds = %for.body
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call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !17
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%lsr.iv.next = add i32 %lsr.iv, -1, !dbg !18
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%exitcond.not = icmp eq i32 %lsr.iv.next, 0, !dbg !18
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br i1 %exitcond.not, label %for.end, label %for.body, !dbg !21, !llvm.loop !22
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for.body: ; preds = %for.cond, %for.body.preheader
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%lsr.iv = phi i32 [ %lsr.iv.next, %for.cond ], [ %0, %for.body.preheader ]
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%1 = icmp sgt i32 %x, 0
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call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !17
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call void @llvm.dbg.value(metadata i32 undef, metadata !16, metadata !DIExpression()), !dbg !17
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br i1 %1, label %if.then, label %for.cond, !dbg !26
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if.then: ; preds = %for.body
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%mul2 = mul nsw i32 %a, %x, !dbg !28
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call void @llvm.dbg.value(metadata i32 %mul2, metadata !15, metadata !DIExpression()), !dbg !17
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br label %for.end, !dbg !31
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for.end: ; preds = %for.cond, %if.then, %entry
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%a.addr.0 = phi i32 [ %mul2, %if.then ], [ %a, %entry ], [ %a, %for.cond ]
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call void @llvm.dbg.value(metadata i32 %a.addr.0, metadata !15, metadata !DIExpression()), !dbg !17
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ret i32 %a.addr.0, !dbg !32
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}
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/dir")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"uwtable", i32 1}
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!7 = !{!"clang version 13.0.0"}
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!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !9, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !11, !11, !11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !{!13, !14, !15, !16}
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!13 = !DILocalVariable(name: "x", arg: 1, scope: !8, file: !1, line: 2, type: !11)
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!14 = !DILocalVariable(name: "y", arg: 2, scope: !8, file: !1, line: 2, type: !11)
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!15 = !DILocalVariable(name: "a", arg: 3, scope: !8, file: !1, line: 2, type: !11)
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!16 = !DILocalVariable(name: "i", scope: !8, file: !1, line: 3, type: !11)
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!17 = !DILocation(line: 0, scope: !8)
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!18 = !DILocation(line: 4, column: 17, scope: !19)
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!19 = distinct !DILexicalBlock(scope: !20, file: !1, line: 4, column: 3)
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!20 = distinct !DILexicalBlock(scope: !8, file: !1, line: 4, column: 3)
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!21 = !DILocation(line: 4, column: 3, scope: !20)
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!22 = distinct !{!22, !21, !23, !24, !25}
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!23 = !DILocation(line: 9, column: 3, scope: !20)
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!24 = !{!"llvm.loop.mustprogress"}
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!25 = !{!"llvm.loop.unroll.disable"}
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!26 = !DILocation(line: 5, column: 9, scope: !27)
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!27 = distinct !DILexicalBlock(scope: !19, file: !1, line: 4, column: 31)
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!28 = !DILocation(line: 6, column: 13, scope: !29)
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!29 = distinct !DILexicalBlock(scope: !30, file: !1, line: 5, column: 16)
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!30 = distinct !DILexicalBlock(scope: !27, file: !1, line: 5, column: 9)
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!31 = !DILocation(line: 7, column: 7, scope: !29)
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!32 = !DILocation(line: 10, column: 3, scope: !8)
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...
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---
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name: foo
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alignment: 16
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liveins:
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- { reg: '$edi', virtual-reg: '' }
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- { reg: '$esi', virtual-reg: '' }
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- { reg: '$edx', virtual-reg: '' }
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body: |
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bb.0.entry:
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successors: %bb.2(0x50000000), %bb.4(0x30000000)
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liveins: $edi, $edx, $esi
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DBG_VALUE $edi, $noreg, !13, !DIExpression(), debug-location !17
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DBG_VALUE $esi, $noreg, !14, !DIExpression(), debug-location !17
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DBG_VALUE $edx, $noreg, !15, !DIExpression(), debug-location !17
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$eax = MOV32rr $edx
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DBG_VALUE 0, $noreg, !16, !DIExpression(), debug-location !17
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DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17
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renamable $esi = nsw IMUL32rr killed renamable $esi, renamable $edi, implicit-def dead $eflags
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TEST32rr renamable $esi, renamable $esi, implicit-def $eflags, debug-location !18
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JCC_1 %bb.4, 14, implicit $eflags, debug-location !21
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bb.2.for.body (align 16):
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successors: %bb.3(0x04000000), %bb.1(0x7c000000)
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liveins: $eax, $edi, $esi
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TEST32rr renamable $edi, renamable $edi, implicit-def $eflags
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DBG_VALUE $noreg, $noreg, !16, !DIExpression(), debug-location !17
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JCC_1 %bb.3, 15, implicit $eflags, debug-location !26
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bb.1.for.cond:
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successors: %bb.4(0x04000000), %bb.2(0x7c000000)
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liveins: $eax, $edi, $esi
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DBG_VALUE $esi, $noreg, !14, !DIExpression(), debug-location !17
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DBG_VALUE $noreg, $noreg, !16, !DIExpression(), debug-location !17
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renamable $esi = ADD32ri8 killed renamable $esi, -1, implicit-def $eflags, debug-location !18
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JCC_1 %bb.2, 5, implicit $eflags, debug-location !21
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bb.4.for.end:
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liveins: $eax
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DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17
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RET64 $eax, debug-location !32
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bb.3.if.then:
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liveins: $eax, $edi
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renamable $eax = nsw IMUL32rr killed renamable $eax, killed renamable $edi, implicit-def dead $eflags, debug-location !28
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DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17
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DBG_VALUE $eax, $noreg, !15, !DIExpression(), debug-location !17
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RET64 $eax, debug-location !32
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...
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