SLPVectorizer: Improve the cost model for loop invariant broadcast values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179930 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 73 insertions, 0 deletions

diff --git a/test/Transforms/SLPVectorizer/X86/loopinvariant.ll b/test/Transforms/SLPVectorizer/X86/loopinvariant.ll
new file mode 100644
index 0000000000..329a349af8
--- /dev/null
+++ b/test/Transforms/SLPVectorizer/X86/loopinvariant.ll
@@ -0,0 +1,73 @@
+; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
+
+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: @foo
+;CHECK: load <4 x i32>
+;CHECK: add <4 x i32>
+;CHECK: store <4 x i32>
+;CHECK: load <4 x i32>
+;CHECK: add <4 x i32>
+;CHECK: store <4 x i32>
+;CHECK: ret
+define i32 @foo(i32* nocapture %A, i32 %n) #0 {
+entry:
+  %cmp62 = icmp sgt i32 %n, 0
+  br i1 %cmp62, label %for.body, label %for.end
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
+  %arrayidx = getelementptr inbounds i32* %A, i64 %indvars.iv
+  %0 = load i32* %arrayidx, align 4, !tbaa !0
+  %add1 = add nsw i32 %0, %n
+  store i32 %add1, i32* %arrayidx, align 4, !tbaa !0
+  %1 = or i64 %indvars.iv, 1
+  %arrayidx4 = getelementptr inbounds i32* %A, i64 %1
+  %2 = load i32* %arrayidx4, align 4, !tbaa !0
+  %add5 = add nsw i32 %2, %n
+  store i32 %add5, i32* %arrayidx4, align 4, !tbaa !0
+  %3 = or i64 %indvars.iv, 2
+  %arrayidx8 = getelementptr inbounds i32* %A, i64 %3
+  %4 = load i32* %arrayidx8, align 4, !tbaa !0
+  %add9 = add nsw i32 %4, %n
+  store i32 %add9, i32* %arrayidx8, align 4, !tbaa !0
+  %5 = or i64 %indvars.iv, 3
+  %arrayidx12 = getelementptr inbounds i32* %A, i64 %5
+  %6 = load i32* %arrayidx12, align 4, !tbaa !0
+  %add13 = add nsw i32 %6, %n
+  store i32 %add13, i32* %arrayidx12, align 4, !tbaa !0
+  %7 = or i64 %indvars.iv, 4
+  %arrayidx16 = getelementptr inbounds i32* %A, i64 %7
+  %8 = load i32* %arrayidx16, align 4, !tbaa !0
+  %add17 = add nsw i32 %8, %n
+  store i32 %add17, i32* %arrayidx16, align 4, !tbaa !0
+  %9 = or i64 %indvars.iv, 5
+  %arrayidx20 = getelementptr inbounds i32* %A, i64 %9
+  %10 = load i32* %arrayidx20, align 4, !tbaa !0
+  %add21 = add nsw i32 %10, %n
+  store i32 %add21, i32* %arrayidx20, align 4, !tbaa !0
+  %11 = or i64 %indvars.iv, 6
+  %arrayidx24 = getelementptr inbounds i32* %A, i64 %11
+  %12 = load i32* %arrayidx24, align 4, !tbaa !0
+  %add25 = add nsw i32 %12, %n
+  store i32 %add25, i32* %arrayidx24, align 4, !tbaa !0
+  %13 = or i64 %indvars.iv, 7
+  %arrayidx28 = getelementptr inbounds i32* %A, i64 %13
+  %14 = load i32* %arrayidx28, align 4, !tbaa !0
+  %add29 = add nsw i32 %14, %n
+  store i32 %add29, i32* %arrayidx28, align 4, !tbaa !0
+  %indvars.iv.next = add i64 %indvars.iv, 8
+  %15 = trunc i64 %indvars.iv.next to i32
+  %cmp = icmp slt i32 %15, %n
+  br i1 %cmp, label %for.body, label %for.end
+
+for.end:                                          ; preds = %for.body, %entry
+  ret i32 undef
+}
+
+attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!0 = metadata !{metadata !"int", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA"}