[llvm] r254342 - [InstCombine] add tests to show potential vector IR shuffle transforms

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Mon Nov 30 16:39:36 2015
New Revision: 254342

URL: http://llvm.org/viewvc/llvm-project?rev=254342&view=rev
Log:
[InstCombine] add tests to show potential vector IR shuffle transforms

Modified:
    llvm/trunk/test/Transforms/InstCombine/insert-extract-shuffle.ll

Modified: llvm/trunk/test/Transforms/InstCombine/insert-extract-shuffle.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/insert-extract-shuffle.ll?rev=254342&r1=254341&r2=254342&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/insert-extract-shuffle.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/insert-extract-shuffle.ll Mon Nov 30 16:39:36 2015
@@ -24,14 +24,57 @@ define <4 x i16> @test2(<8 x i16> %in, <
   ret <4 x i16> %vec.3
 }
 
-define <2 x i64> @test_vcopyq_lane_p64(<2 x i64> %a, <1 x i64> %b) #0 {
+define <2 x i64> @test_vcopyq_lane_p64(<2 x i64> %a, <1 x i64> %b) {
 ; CHECK-LABEL: @test_vcopyq_lane_p64
-; CHECK: extractelement
-; CHECK: insertelement
-; CHECK-NOT: shufflevector
-entry:
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: ret <2 x i64> %res
   %elt = extractelement <1 x i64> %b, i32 0
   %res = insertelement <2 x i64> %a, i64 %elt, i32 1
   ret <2 x i64> %res
 }
 
+; PR2109: https://llvm.org/bugs/show_bug.cgi?id=2109
+
+define <4 x float> @widen_extract2(<4 x float> %ins, <2 x float> %ext) {
+; CHECK-LABEL: @widen_extract2(
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: ret <4 x float> %i2
+  %e1 = extractelement <2 x float> %ext, i32 0
+  %e2 = extractelement <2 x float> %ext, i32 1
+  %i1 = insertelement <4 x float> %ins, float %e1, i32 1
+  %i2 = insertelement <4 x float> %i1, float %e2, i32 3
+  ret <4 x float> %i2
+}
+
+define <4 x float> @widen_extract3(<4 x float> %ins, <3 x float> %ext) {
+; CHECK-LABEL: @widen_extract3(
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: ret <4 x float> %i3
+  %e1 = extractelement <3 x float> %ext, i32 0
+  %e2 = extractelement <3 x float> %ext, i32 1
+  %e3 = extractelement <3 x float> %ext, i32 2
+  %i1 = insertelement <4 x float> %ins, float %e1, i32 2
+  %i2 = insertelement <4 x float> %i1, float %e2, i32 1
+  %i3 = insertelement <4 x float> %i2, float %e3, i32 0
+  ret <4 x float> %i3
+}
+
+define <8 x float> @too_wide(<8 x float> %ins, <2 x float> %ext) {
+; CHECK-LABEL: @too_wide(
+; CHECK-NEXT: extractelement
+; CHECK-NEXT: insertelement
+; CHECK-NEXT: ret <8 x float> %i1
+  %e1 = extractelement <2 x float> %ext, i32 0
+  %i1 = insertelement <8 x float> %ins, float %e1, i32 2
+  ret <8 x float> %i1
+}
+