init

Author: Mel-Chen

llvm/test/Transforms/LoopVectorize/RISCV/dbg-tail-folding-by-evl.ll

@@ -0,0 +1,73 @@
+; RUN: opt -passes=loop-vectorize \
+; RUN: -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue \
+; RUN: -mtriple=riscv64 -mattr=+v -S < %s | FileCheck %s --check-prefix=IF-EVL
+
+; RUN: opt -passes=loop-vectorize \
+; RUN: -prefer-predicate-over-epilogue=scalar-epilogue \
+; RUN: -mtriple=riscv64 -mattr=+v -S < %s | FileCheck %s --check-prefix=NO-VP
+
+target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
+
+define void @reverse_store(ptr %a, i32 %n) !dbg !4 {
+entry:
+    #dbg_value(ptr %a, !10, !DIExpression(), !14)
+    #dbg_value(i32 %n, !11, !DIExpression(), !14)
+    #dbg_value(i32 %n, !12, !DIExpression(DW_OP_constu, 1, DW_OP_minus, DW_OP_stack_value), !15)
+  %cmp4 = icmp sgt i32 %n, 0, !dbg !16
+  br i1 %cmp4, label %for.body.preheader, label %for.cond.cleanup, !dbg !18
+
+for.body.preheader:                               ; preds = %entry
+  %0 = zext nneg i32 %n to i64, !dbg !19
+  br label %for.body, !dbg !19
+
+for.cond.cleanup.loopexit:                        ; preds = %for.body
+  br label %for.cond.cleanup, !dbg !20
+
+for.cond.cleanup:                                 ; preds = %for.cond.cleanup.loopexit, %entry
+  ret void, !dbg !20
+
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %indvars.iv = phi i64 [ %0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
+    #dbg_value(i64 %indvars.iv, !12, !DIExpression(DW_OP_constu, 1, DW_OP_minus, DW_OP_stack_value), !15)
+  %indvars.iv.next = add nsw i64 %indvars.iv, -1, !dbg !21
+    #dbg_value(i64 %indvars.iv.next, !12, !DIExpression(), !15)
+  %arrayidx = getelementptr inbounds nuw i32, ptr %a, i64 %indvars.iv.next, !dbg !22
+  %1 = trunc nuw nsw i64 %indvars.iv.next to i32, !dbg !23
+  store i32 %1, ptr %arrayidx, align 4, !dbg !23
+    #dbg_value(i64 %indvars.iv.next, !12, !DIExpression(DW_OP_constu, 1, DW_OP_minus, DW_OP_stack_value), !15)
+  %cmp = icmp samesign ugt i64 %indvars.iv, 1, !dbg !24
+  br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !25, !llvm.loop !26
+}
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "dbg-tail-folding-by-evl.cpp", directory: "/test/file/path")
+!2 = !{i32 2, !"Debug Info Version", i32 3}
+!3 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
+!4 = distinct !DISubprogram(name: "reverse_store", linkageName: "_Z13reverse_storePii", scope: !1, file: !1, line: 1, type: !5, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !9)
+!5 = !DISubroutineType(types: !6)
+!6 = !{null, !7, !8}
+!7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64)
+!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!9 = !{!10, !11, !12}
+!10 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 1, type: !7)
+!11 = !DILocalVariable(name: "n", arg: 2, scope: !4, file: !1, line: 1, type: !8)
+!12 = !DILocalVariable(name: "i", scope: !13, file: !1, line: 2, type: !8)
+!13 = distinct !DILexicalBlock(scope: !4, file: !1, line: 2, column: 5)
+!14 = !DILocation(line: 0, scope: !4)
+!15 = !DILocation(line: 0, scope: !13)
+!16 = !DILocation(line: 2, column: 27, scope: !17)
+!17 = distinct !DILexicalBlock(scope: !13, file: !1, line: 2, column: 5)
+!18 = !DILocation(line: 2, column: 5, scope: !13)
+!19 = !DILocation(line: 2, column: 5, scope: !13)
+!20 = !DILocation(line: 4, column: 1, scope: !4)
+!21 = !DILocation(line: 2, scope: !13)
+!22 = !DILocation(line: 3, column: 7, scope: !17)
+!23 = !DILocation(line: 3, column: 12, scope: !17)
+!24 = !DILocation(line: 2, column: 27, scope: !17)
+!25 = !DILocation(line: 2, column: 5, scope: !13)
+!26 = distinct !{!26, !19, !27, !28}
+!27 = !DILocation(line: 3, column: 14, scope: !13)
+!28 = !{!"llvm.loop.vectorize.enable", i1 true}