[PATCH] D125286: [SLP][NFC] Precommit test for a followup patch on root steering.

[Vasileios Porpodas via Phabricator via llvm-commits]

vporpo created this revision.
vporpo added reviewers: vdmitrie, ABataev.
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vporpo requested review of this revision.
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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125286

Files:
  llvm/test/Transforms/SLPVectorizer/X86/vectorize-pair-path.ll


Index: llvm/test/Transforms/SLPVectorizer/X86/vectorize-pair-path.ll
===================================================================
--- llvm/test/Transforms/SLPVectorizer/X86/vectorize-pair-path.ll
+++ llvm/test/Transforms/SLPVectorizer/X86/vectorize-pair-path.ll
@@ -1,5 +1,5 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -slp-vectorizer -mattr=+avx2 -S | FileCheck %s
+; RUN: opt < %s -slp-vectorizer -mattr=+avx2 -march=corei7-avx -S | FileCheck %s
 
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
@@ -55,3 +55,44 @@
 }
 
 attributes #0 = { "unsafe-fp-math"="true" }
+
+; This test checks that root steering works and that the code gets vectorized.
+
+define void @root_steering() {
+; CHECK-LABEL: @root_steering(
+; CHECK-NEXT:  bb:
+; CHECK-NEXT:    [[CHAIN2_2:%.*]] = fadd double 4.000000e-01, 5.000000e-01
+; CHECK-NEXT:    [[CHAIN2_1:%.*]] = fmul double 3.000000e-01, [[CHAIN2_2]]
+; CHECK-NEXT:    [[ROOT5:%.*]] = fadd double 2.000000e-01, [[CHAIN2_1]]
+; CHECK-NEXT:    [[ROOT3:%.*]] = fmul double 3.000000e-01, 2.000000e-01
+; CHECK-NEXT:    [[MUL:%.*]] = fmul double [[ROOT3]], 1.000000e-01
+; CHECK-NEXT:    [[CHAINB_3:%.*]] = fadd double 3.000000e-01, 4.000000e-01
+; CHECK-NEXT:    [[CHAINB_2:%.*]] = fmul double 2.000000e-01, [[CHAINB_3]]
+; CHECK-NEXT:    [[CHAINB_1:%.*]] = fadd double 1.000000e-01, [[CHAINB_2]]
+; CHECK-NEXT:    [[ROOT4:%.*]] = fmul double [[MUL]], [[CHAINB_1]]
+; CHECK-NEXT:    [[ROOT2:%.*]] = fadd double 1.000000e-01, [[ROOT4]]
+; CHECK-NEXT:    [[ROOT1:%.*]] = fmul double [[ROOT3]], [[ROOT5]]
+; CHECK-NEXT:    [[DIV:%.*]] = fdiv double [[ROOT1]], [[ROOT2]]
+; CHECK-NEXT:    [[SEED:%.*]] = fcmp ogt double [[DIV]], 3.000000e-01
+; CHECK-NEXT:    ret void
+;
+bb:
+  %chain2_2 = fadd double 0.4, 0.5
+  %chain2_1 = fmul double 0.3, %chain2_2
+  %root5 = fadd double 0.2, %chain2_1
+
+  %root3 = fmul double 0.3, 0.2
+  %mul = fmul double %root3, 0.1
+
+  %chainB_3 = fadd double 0.3, 0.4
+  %chainB_2 = fmul double 0.2, %chainB_3
+  %chainB_1 = fadd double 0.1, %chainB_2
+  %root4 = fmul double %mul, %chainB_1
+  %root2 = fadd double 0.1, %root4
+
+  %root1 = fmul double %root3, %root5
+  %div = fdiv double %root1, %root2
+
+  %seed = fcmp ogt double %div, 0.3
+  ret void
+}


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