[SLPVectorizer] Add test related to SLP Throttling support, NFCI.

llvm-svn: 356754

diff --git a/llvm/test/Transforms/SLPVectorizer/X86/slp-throttle.ll b/llvm/test/Transforms/SLPVectorizer/X86/slp-throttle.ll
new file mode 100644 (file)
index 0000000..6752641
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/X86/slp-throttle.ll
@@ -0,0 +1,37 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -slp-vectorizer -S -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver2 < %s | FileCheck %s
+
+define dso_local void @rftbsub(double* %a) local_unnamed_addr #0 {
+; CHECK-LABEL: @rftbsub(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[ARRAYIDX6:%.*]] = getelementptr inbounds double, double* [[A:%.*]], i64 2
+; CHECK-NEXT:    [[TMP0:%.*]] = load double, double* [[ARRAYIDX6]], align 8
+; CHECK-NEXT:    [[TMP1:%.*]] = or i64 2, 1
+; CHECK-NEXT:    [[ARRAYIDX12:%.*]] = getelementptr inbounds double, double* [[A]], i64 [[TMP1]]
+; CHECK-NEXT:    [[TMP2:%.*]] = load double, double* [[ARRAYIDX12]], align 8
+; CHECK-NEXT:    [[ADD16:%.*]] = fadd double [[TMP2]], undef
+; CHECK-NEXT:    [[MUL18:%.*]] = fmul double undef, [[ADD16]]
+; CHECK-NEXT:    [[ADD19:%.*]] = fadd double undef, [[MUL18]]
+; CHECK-NEXT:    [[SUB22:%.*]] = fsub double undef, undef
+; CHECK-NEXT:    [[SUB25:%.*]] = fsub double [[TMP0]], [[ADD19]]
+; CHECK-NEXT:    store double [[SUB25]], double* [[ARRAYIDX6]], align 8
+; CHECK-NEXT:    [[SUB29:%.*]] = fsub double [[TMP2]], [[SUB22]]
+; CHECK-NEXT:    store double [[SUB29]], double* [[ARRAYIDX12]], align 8
+; CHECK-NEXT:    unreachable
+;
+entry:
+  %arrayidx6 = getelementptr inbounds double, double* %a, i64 2
+  %0 = load double, double* %arrayidx6, align 8
+  %1 = or i64 2, 1
+  %arrayidx12 = getelementptr inbounds double, double* %a, i64 %1
+  %2 = load double, double* %arrayidx12, align 8
+  %add16 = fadd double %2, undef
+  %mul18 = fmul double undef, %add16
+  %add19 = fadd double undef, %mul18
+  %sub22 = fsub double undef, undef
+  %sub25 = fsub double %0, %add19
+  store double %sub25, double* %arrayidx6, align 8
+  %sub29 = fsub double %2, %sub22
+  store double %sub29, double* %arrayidx12, align 8
+  unreachable
+}