[LoopVectorize] Precommit tests for D62510. NFC

llvm-svn: 362060

1 files changed, 26 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/X86/fneg-cost.ll b/llvm/test/Transforms/LoopVectorize/X86/fneg-cost.ll
new file mode 100644
index 00000000000..65898716742
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/X86/fneg-cost.ll
@@ -0,0 +1,26 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt %s -loop-vectorize -debug-only=loop-vectorize -S 2>&1 | FileCheck %s
+; REQUIRES: asserts
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.8.0"
+
+; CHECK: Found an estimated cost of 2 for VF 1 For instruction:   %neg = fneg float %{{.*}}
+; CHECK: Found an estimated cost of 6 for VF 2 For instruction:   %neg = fneg float %{{.*}}
+; CHECK: Found an estimated cost of 14 for VF 4 For instruction:   %neg = fneg float %{{.*}}
+define void @fneg_cost(float* %a, i64 %n) {
+entry:
+  br label %for.body
+for.body:                                         ; preds = %for.body.preheader, %for.body
+  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
+  %arrayidx = getelementptr inbounds float, float* %a, i64 %indvars.iv
+  %0 = load float, float* %arrayidx, align 4
+  %neg = fneg float %0
+  store float %neg, float* %arrayidx, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %cmp = icmp eq i64 %indvars.iv.next, %n
+  br i1 %cmp, label %for.end, label %for.body
+
+for.end:
+  ret void
+}