for (auto *V : VL) {
++Idx;
+ // Need to exclude undefs from analysis.
+ if (isa<UndefValue>(V) || Mask[Idx] == UndefMaskElem)
+ continue;
+
// Reached the start of a new vector registers.
if (Idx % EltsPerVector == 0) {
AllConsecutive = true;
// Check all extracts for a vector register on the target directly
// extract values in order.
unsigned CurrentIdx = *getExtractIndex(cast<Instruction>(V));
- unsigned PrevIdx = *getExtractIndex(cast<Instruction>(VL[Idx - 1]));
- AllConsecutive &= PrevIdx + 1 == CurrentIdx &&
- CurrentIdx % EltsPerVector == Idx % EltsPerVector;
+ if (!isa<UndefValue>(VL[Idx - 1]) && Mask[Idx - 1] != UndefMaskElem) {
+ unsigned PrevIdx = *getExtractIndex(cast<Instruction>(VL[Idx - 1]));
+ AllConsecutive &= PrevIdx + 1 == CurrentIdx &&
+ CurrentIdx % EltsPerVector == Idx % EltsPerVector;
+ }
if (AllConsecutive)
continue;
--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -slp-vectorizer -S -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
+
+define void @test() {
+; CHECK-LABEL: @test(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br label [[BODY:%.*]]
+; CHECK: body:
+; CHECK-NEXT: [[TMP0:%.*]] = phi <2 x double> [ zeroinitializer, [[ENTRY:%.*]] ], [ zeroinitializer, [[BODY]] ]
+; CHECK-NEXT: [[TMP1:%.*]] = extractelement <2 x double> [[TMP0]], i32 1
+; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> <double poison, double undef>, double [[TMP1]], i32 0
+; CHECK-NEXT: [[TMP3:%.*]] = fmul fast <2 x double> [[TMP2]], zeroinitializer
+; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x double> [[TMP3]], i32 0
+; CHECK-NEXT: [[TMP5:%.*]] = extractelement <2 x double> [[TMP3]], i32 1
+; CHECK-NEXT: [[ADD8_I_I:%.*]] = fadd fast double [[TMP4]], [[TMP5]]
+; CHECK-NEXT: [[CMP42_I:%.*]] = fcmp fast ole double [[ADD8_I_I]], 0.000000e+00
+; CHECK-NEXT: br i1 false, label [[BODY]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: br i1 false, label [[IF_THEN135_I:%.*]], label [[IF_END209_I:%.*]]
+; CHECK: if.then135.i:
+; CHECK-NEXT: [[TMP6:%.*]] = fcmp fast olt <2 x double> [[TMP0]], zeroinitializer
+; CHECK-NEXT: [[TMP7:%.*]] = extractelement <2 x i1> [[TMP6]], i32 0
+; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x i1> <i1 poison, i1 false>, i1 [[TMP7]], i32 0
+; CHECK-NEXT: [[TMP9:%.*]] = select <2 x i1> [[TMP8]], <2 x double> zeroinitializer, <2 x double> zeroinitializer
+; CHECK-NEXT: [[TMP10:%.*]] = fmul fast <2 x double> zeroinitializer, [[TMP9]]
+; CHECK-NEXT: [[TMP11:%.*]] = fmul fast <2 x double> [[TMP10]], zeroinitializer
+; CHECK-NEXT: [[TMP12:%.*]] = fadd fast <2 x double> [[TMP11]], zeroinitializer
+; CHECK-NEXT: br label [[IF_END209_I]]
+; CHECK: if.end209.i:
+; CHECK-NEXT: [[TMP13:%.*]] = phi <2 x double> [ [[TMP12]], [[IF_THEN135_I]] ], [ zeroinitializer, [[EXIT]] ]
+; CHECK-NEXT: ret void
+;
+entry:
+ br label %body
+
+body:
+ %phi1 = phi double [ 0.000000e+00, %entry ], [ 0.000000e+00, %body ]
+ %phi2 = phi double [ 0.000000e+00, %entry ], [ 0.000000e+00, %body ]
+ %mul.i478.i = fmul fast double %phi1, 0.000000e+00
+ %mul7.i485.i = fmul fast double undef, 0.000000e+00
+ %add8.i.i = fadd fast double %mul.i478.i, %mul7.i485.i
+ %cmp42.i = fcmp fast ole double %add8.i.i, 0.000000e+00
+ br i1 false, label %body, label %exit
+
+exit:
+ br i1 false, label %if.then135.i, label %if.end209.i
+
+if.then135.i:
+ %cmp145.i = fcmp fast olt double %phi1, 0.000000e+00
+ %0 = select i1 false, double 0.000000e+00, double 0.000000e+00
+ %cmp152.i = fcmp fast olt double %phi2, 0.000000e+00
+ %1 = select i1 %cmp152.i, double 0.000000e+00, double 0.000000e+00
+ %mul166.i = fmul fast double 0.000000e+00, %0
+ %mul177.i = fmul fast double %mul166.i, 0.000000e+00
+ %add178.i = fadd fast double %mul177.i, 0.000000e+00
+ %mul181.i = fmul fast double 0.000000e+00, %1
+ %mul182.i = fmul fast double %mul181.i, 0.000000e+00
+ %add183.i = fadd fast double %mul182.i, 0.000000e+00
+ br label %if.end209.i
+
+if.end209.i:
+ %drdys.1.i = phi double [ %add183.i, %if.then135.i ], [ 0.000000e+00, %exit ]
+ %dbdxs.1.i = phi double [ %add178.i, %if.then135.i ], [ 0.000000e+00, %exit ]
+ ret void
+}