Boost the effective chain depth of loads and stores.
By default, boost the chain depth contribution of loads and stores. This will allow a load/store pair to vectorize even when it would not otherwise be long enough to satisfy the chain depth requirement.
llvm-svn: 149761
diff --git a/llvm/test/Transforms/BBVectorize/mem-op-depth.ll b/llvm/test/Transforms/BBVectorize/mem-op-depth.ll
new file mode 100644
index 0000000..84f16bd
--- /dev/null
+++ b/llvm/test/Transforms/BBVectorize/mem-op-depth.ll
@@ -0,0 +1,22 @@
+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"
+target triple = "x86_64-unknown-linux-gnu"
+; RUN: opt < %s -bb-vectorize -bb-vectorize-req-chain-depth=6 -instcombine -gvn -S | FileCheck %s
+
+@A = common global [1024 x float] zeroinitializer, align 16
+@B = common global [1024 x float] zeroinitializer, align 16
+
+define i32 @test1() nounwind {
+; CHECK: @test1
+ %V1 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 0), align 16
+ %V2 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 1), align 4
+ %V3= load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 2), align 8
+ %V4 = load float* getelementptr inbounds ([1024 x float]* @A, i64 0, i64 3), align 4
+; CHECK: %V1 = load <4 x float>* bitcast ([1024 x float]* @A to <4 x float>*), align 16
+ store float %V1, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 0), align 16
+ store float %V2, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 1), align 4
+ store float %V3, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 2), align 8
+ store float %V4, float* getelementptr inbounds ([1024 x float]* @B, i64 0, i64 3), align 4
+; CHECK-NEXT: store <4 x float> %V1, <4 x float>* bitcast ([1024 x float]* @B to <4 x float>*), align 16
+ ret i32 0
+; CHECK-NEXT: ret i32 0
+}