[llvm] r293566 - [InstCombine] add vector test for (X <<nsw C1) >>s C2 --> X <<nsw (C1 - C2); NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Mon Jan 30 17:26:17 2017
New Revision: 293566

URL: http://llvm.org/viewvc/llvm-project?rev=293566&view=rev
Log:
[InstCombine] add vector test for (X <<nsw C1) >>s C2 --> X <<nsw (C1 - C2); NFC

Modified:
    llvm/trunk/test/Transforms/InstCombine/shift.ll

Modified: llvm/trunk/test/Transforms/InstCombine/shift.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/shift.ll?rev=293566&r1=293565&r2=293566&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/shift.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/shift.ll Mon Jan 30 17:26:17 2017
@@ -987,6 +987,8 @@ define <2 x i32> @test51_no_nuw_splat_ve
   ret <2 x i32> %B
 }
 
+; (X <<nsw C1) >>s C2 --> X <<nsw (C1 - C2)
+
 define i32 @test52(i32 %x) {
 ; CHECK-LABEL: @test52(
 ; CHECK-NEXT:    [[B:%.*]] = shl nsw i32 %x, 2
@@ -997,6 +999,19 @@ define i32 @test52(i32 %x) {
   ret i32 %B
 }
 
+; (X <<nsw C1) >>s C2 --> X <<nsw (C1 - C2)
+
+define <2 x i32> @test52_splat_vec(<2 x i32> %x) {
+; CHECK-LABEL: @test52_splat_vec(
+; CHECK-NEXT:    [[A:%.*]] = shl nsw <2 x i32> %x, <i32 3, i32 3>
+; CHECK-NEXT:    [[B:%.*]] = ashr exact <2 x i32> [[A]], <i32 1, i32 1>
+; CHECK-NEXT:    ret <2 x i32> [[B]]
+;
+  %A = shl nsw <2 x i32> %x, <i32 3, i32 3>
+  %B = ashr <2 x i32> %A, <i32 1, i32 1>
+  ret <2 x i32> %B
+}
+
 ; (X <<nuw C1) >>u C2 --> X <<nuw (C1 - C2)
 
 define i32 @test53(i32 %x) {