[llvm] r352555 - Check bool attribute value in getOptionalBoolLoopAttribute.
Alina Sbirlea via llvm-commits
llvm-commits at lists.llvm.org
Tue Jan 29 14:33:20 PST 2019
Author: asbirlea
Date: Tue Jan 29 14:33:20 2019
New Revision: 352555
URL: http://llvm.org/viewvc/llvm-project?rev=352555&view=rev
Log:
Check bool attribute value in getOptionalBoolLoopAttribute.
Summary:
Check the bool value of the attribute in getOptionalBoolLoopAttribute
not just its existance.
Eliminates the warning noise generated when vectorization is explicitly disabled.
Reviewers: Meinersbur, hfinkel, dmgreen
Subscribers: jlebar, sanjoy, llvm-commits
Differential Revision: https://reviews.llvm.org/D57260
Added:
llvm/trunk/test/Transforms/LoopVectorize/no_switch_disable_vectorization.ll
Modified:
llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp
Modified: llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp?rev=352555&r1=352554&r2=352555&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/LoopUtils.cpp Tue Jan 29 14:33:20 2019
@@ -216,7 +216,10 @@ static Optional<bool> getOptionalBoolLoo
// When the value is absent it is interpreted as 'attribute set'.
return true;
case 2:
- return mdconst::extract_or_null<ConstantInt>(MD->getOperand(1).get());
+ if (ConstantInt *IntMD =
+ mdconst::extract_or_null<ConstantInt>(MD->getOperand(1).get()))
+ return IntMD->getZExtValue();
+ return true;
}
llvm_unreachable("unexpected number of options");
}
Added: llvm/trunk/test/Transforms/LoopVectorize/no_switch_disable_vectorization.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LoopVectorize/no_switch_disable_vectorization.ll?rev=352555&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/LoopVectorize/no_switch_disable_vectorization.ll (added)
+++ llvm/trunk/test/Transforms/LoopVectorize/no_switch_disable_vectorization.ll Tue Jan 29 14:33:20 2019
@@ -0,0 +1,95 @@
+; RUN: opt < %s -loop-vectorize -force-vector-width=4 -transform-warning -S 2>&1 | FileCheck %s
+; RUN: opt < %s -loop-vectorize -force-vector-width=1 -transform-warning -S 2>&1 | FileCheck %s -check-prefix=NOANALYSIS
+; RUN: opt < %s -loop-vectorize -force-vector-width=4 -transform-warning -pass-remarks-missed='loop-vectorize' -S 2>&1 | FileCheck %s -check-prefix=MOREINFO
+
+; This test is a copy of no_switch.ll, with the "llvm.loop.vectorize.enable" metadata set to false.
+; It tests that vectorization is explicitly disabled and no warnings are emitted.
+
+; CHECK-NOT: remark: source.cpp:4:5: loop not vectorized: loop contains a switch statement
+; CHECK-NOT: warning: source.cpp:4:5: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
+
+; NOANALYSIS-NOT: remark: {{.*}}
+; NOANALYSIS-NOT: warning: source.cpp:4:5: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
+
+; MOREINFO: remark: source.cpp:4:5: loop not vectorized: vectorization is explicitly disabled
+; MOREINFO-NOT: warning: source.cpp:4:5: loop not vectorized: the optimizer was unable to perform the requested transformation; the transformation might be disabled or specified as part of an unsupported transformation ordering
+
+; CHECK: _Z11test_switchPii
+; CHECK-NOT: x i32>
+; CHECK: ret
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+
+; Function Attrs: nounwind optsize ssp uwtable
+define void @_Z11test_switchPii(i32* nocapture %A, i32 %Length) #0 !dbg !4 {
+entry:
+ %cmp18 = icmp sgt i32 %Length, 0, !dbg !10
+ br i1 %cmp18, label %for.body.preheader, label %for.end, !dbg !10, !llvm.loop !12
+
+for.body.preheader: ; preds = %entry
+ br label %for.body, !dbg !14
+
+for.body: ; preds = %for.body.preheader, %for.inc
+ %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %for.body.preheader ]
+ %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv, !dbg !14
+ %0 = load i32, i32* %arrayidx, align 4, !dbg !14, !tbaa !16
+ switch i32 %0, label %for.inc [
+ i32 0, label %sw.bb
+ i32 1, label %sw.bb3
+ ], !dbg !14
+
+sw.bb: ; preds = %for.body
+ %1 = trunc i64 %indvars.iv to i32, !dbg !20
+ %mul = shl nsw i32 %1, 1, !dbg !20
+ br label %for.inc, !dbg !22
+
+sw.bb3: ; preds = %for.body
+ %2 = trunc i64 %indvars.iv to i32, !dbg !23
+ store i32 %2, i32* %arrayidx, align 4, !dbg !23, !tbaa !16
+ br label %for.inc, !dbg !23
+
+for.inc: ; preds = %sw.bb3, %for.body, %sw.bb
+ %storemerge = phi i32 [ %mul, %sw.bb ], [ 0, %for.body ], [ 0, %sw.bb3 ]
+ store i32 %storemerge, i32* %arrayidx, align 4, !dbg !20, !tbaa !16
+ %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !10
+ %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !10
+ %exitcond = icmp eq i32 %lftr.wideiv, %Length, !dbg !10
+ br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !10, !llvm.loop !12
+
+for.end.loopexit: ; preds = %for.inc
+ br label %for.end
+
+for.end: ; preds = %for.end.loopexit, %entry
+ ret void, !dbg !24
+}
+
+attributes #0 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!7, !8}
+!llvm.ident = !{!9}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0", isOptimized: true, runtimeVersion: 6, emissionKind: LineTablesOnly, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
+!1 = !DIFile(filename: "source.cpp", directory: ".")
+!2 = !{}
+!4 = distinct !DISubprogram(name: "test_switch", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, retainedNodes: !2)
+!5 = !DIFile(filename: "source.cpp", directory: ".")
+!6 = !DISubroutineType(types: !2)
+!7 = !{i32 2, !"Dwarf Version", i32 2}
+!8 = !{i32 2, !"Debug Info Version", i32 3}
+!9 = !{!"clang version 3.5.0"}
+!10 = !DILocation(line: 3, column: 8, scope: !11)
+!11 = distinct !DILexicalBlock(line: 3, column: 3, file: !1, scope: !4)
+!12 = !{!12, !13, !13}
+!13 = !{!"llvm.loop.vectorize.enable", i1 false}
+!14 = !DILocation(line: 4, column: 5, scope: !15)
+!15 = distinct !DILexicalBlock(line: 3, column: 36, file: !1, scope: !11)
+!16 = !{!17, !17, i64 0}
+!17 = !{!"int", !18, i64 0}
+!18 = !{!"omnipotent char", !19, i64 0}
+!19 = !{!"Simple C/C++ TBAA"}
+!20 = !DILocation(line: 6, column: 7, scope: !21)
+!21 = distinct !DILexicalBlock(line: 4, column: 18, file: !1, scope: !15)
+!22 = !DILocation(line: 7, column: 5, scope: !21)
+!23 = !DILocation(line: 9, column: 7, scope: !21)
+!24 = !DILocation(line: 14, column: 1, scope: !4)
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