[SLP] Add a tests for PR36280, NFC.

llvm-svn: 324510

diff --git a/llvm/test/Transforms/SLPVectorizer/X86/PR36280.ll b/llvm/test/Transforms/SLPVectorizer/X86/PR36280.ll
new file mode 100644 (file)
index 0000000..37b11d8
--- /dev/null
+++ b/llvm/test/Transforms/SLPVectorizer/X86/PR36280.ll
@@ -0,0 +1,28 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -slp-vectorizer -S < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=bdver2 | FileCheck %s
+
+define float @jacobi(float* %p, float %x, float %y, float %z) {
+; CHECK-LABEL: @jacobi(
+; CHECK-NEXT:    [[GEP1:%.*]] = getelementptr float, float* [[P:%.*]], i64 1
+; CHECK-NEXT:    [[GEP2:%.*]] = getelementptr float, float* [[P]], i64 2
+; CHECK-NEXT:    [[TMP1:%.*]] = bitcast float* [[GEP1]] to <2 x float>*
+; CHECK-NEXT:    [[TMP2:%.*]] = load <2 x float>, <2 x float>* [[TMP1]], align 4
+; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <2 x float> undef, float [[X:%.*]], i32 0
+; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <2 x float> [[TMP3]], float [[Y:%.*]], i32 1
+; CHECK-NEXT:    [[TMP5:%.*]] = fmul <2 x float> [[TMP4]], [[TMP2]]
+; CHECK-NEXT:    [[TMP6:%.*]] = extractelement <2 x float> [[TMP5]], i32 0
+; CHECK-NEXT:    [[ADD1:%.*]] = fadd float [[TMP6]], [[Z:%.*]]
+; CHECK-NEXT:    [[TMP7:%.*]] = extractelement <2 x float> [[TMP5]], i32 1
+; CHECK-NEXT:    [[ADD2:%.*]] = fadd float [[TMP7]], [[ADD1]]
+; CHECK-NEXT:    ret float [[ADD2]]
+;
+  %gep1 = getelementptr float, float* %p, i64 1
+  %gep2 = getelementptr float, float* %p, i64 2
+  %p1 = load float, float* %gep1
+  %p2 = load float, float* %gep2
+  %mul1 = fmul float %p1, %x
+  %mul2 = fmul float %p2, %y
+  %add1 = fadd float %mul1, %z
+  %add2 = fadd float %mul2, %add1
+  ret float %add2
+}