[InstSimplify] add tests for chains of shuffles; NFC
llvm-svn: 299984
diff --git a/llvm/test/Transforms/InstSimplify/shufflevector.ll b/llvm/test/Transforms/InstSimplify/shufflevector.ll
index 4b65801..e4c2c23 100644
--- a/llvm/test/Transforms/InstSimplify/shufflevector.ll
+++ b/llvm/test/Transforms/InstSimplify/shufflevector.ll
@@ -92,3 +92,48 @@
%merged = shufflevector <2 x i32> %upper, <2 x i32> %lower, <4 x i32> <i32 3, i32 2, i32 0, i32 1>
ret <4 x i32> %merged
}
+
+define <8 x double> @extract_and_concat(<8 x double> %x) {
+; CHECK-LABEL: @extract_and_concat(
+; CHECK-NEXT: [[S1:%.*]] = shufflevector <8 x double> [[X:%.*]], <8 x double> undef, <2 x i32> <i32 0, i32 1>
+; CHECK-NEXT: [[S2:%.*]] = shufflevector <8 x double> [[X]], <8 x double> undef, <2 x i32> <i32 2, i32 3>
+; CHECK-NEXT: [[S3:%.*]] = shufflevector <8 x double> [[X]], <8 x double> undef, <2 x i32> <i32 4, i32 5>
+; CHECK-NEXT: [[S4:%.*]] = shufflevector <8 x double> [[X]], <8 x double> undef, <2 x i32> <i32 6, i32 7>
+; CHECK-NEXT: [[S5:%.*]] = shufflevector <2 x double> [[S1]], <2 x double> [[S2]], <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+; CHECK-NEXT: [[S6:%.*]] = shufflevector <2 x double> [[S3]], <2 x double> [[S4]], <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+; CHECK-NEXT: [[S7:%.*]] = shufflevector <4 x double> [[S5]], <4 x double> [[S6]], <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+; CHECK-NEXT: ret <8 x double> [[S7]]
+;
+ %s1 = shufflevector <8 x double> %x, <8 x double> undef, <2 x i32> <i32 0, i32 1>
+ %s2 = shufflevector <8 x double> %x, <8 x double> undef, <2 x i32> <i32 2, i32 3>
+ %s3 = shufflevector <8 x double> %x, <8 x double> undef, <2 x i32> <i32 4, i32 5>
+ %s4 = shufflevector <8 x double> %x, <8 x double> undef, <2 x i32> <i32 6, i32 7>
+ %s5 = shufflevector <2 x double> %s1, <2 x double> %s2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ %s6 = shufflevector <2 x double> %s3, <2 x double> %s4, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ %s7 = shufflevector <4 x double> %s5, <4 x double> %s6, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
+ ret <8 x double> %s7
+}
+
+; This case has intermediate lane crossings.
+
+define <8 x i64> @PR30630(<8 x i64> %x) {
+; CHECK-LABEL: @PR30630(
+; CHECK-NEXT: [[S1:%.*]] = shufflevector <8 x i64> [[X:%.*]], <8 x i64> undef, <2 x i32> <i32 0, i32 4>
+; CHECK-NEXT: [[S2:%.*]] = shufflevector <8 x i64> [[X]], <8 x i64> undef, <2 x i32> <i32 1, i32 5>
+; CHECK-NEXT: [[S3:%.*]] = shufflevector <8 x i64> [[X]], <8 x i64> undef, <2 x i32> <i32 2, i32 6>
+; CHECK-NEXT: [[S4:%.*]] = shufflevector <8 x i64> [[X]], <8 x i64> undef, <2 x i32> <i32 3, i32 7>
+; CHECK-NEXT: [[S5:%.*]] = shufflevector <2 x i64> [[S1]], <2 x i64> [[S2]], <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+; CHECK-NEXT: [[S6:%.*]] = shufflevector <2 x i64> [[S3]], <2 x i64> [[S4]], <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+; CHECK-NEXT: [[S7:%.*]] = shufflevector <4 x i64> [[S5]], <4 x i64> [[S6]], <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 1, i32 3, i32 5, i32 7>
+; CHECK-NEXT: ret <8 x i64> [[S7]]
+;
+ %s1 = shufflevector <8 x i64> %x, <8 x i64> undef, <2 x i32> <i32 0, i32 4>
+ %s2 = shufflevector <8 x i64> %x, <8 x i64> undef, <2 x i32> <i32 1, i32 5>
+ %s3 = shufflevector <8 x i64> %x, <8 x i64> undef, <2 x i32> <i32 2, i32 6>
+ %s4 = shufflevector <8 x i64> %x, <8 x i64> undef, <2 x i32> <i32 3, i32 7>
+ %s5 = shufflevector <2 x i64> %s1, <2 x i64> %s2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ %s6 = shufflevector <2 x i64> %s3, <2 x i64> %s4, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
+ %s7 = shufflevector <4 x i64> %s5, <4 x i64> %s6, <8 x i32> <i32 0, i32 2, i32 4, i32 6, i32 1, i32 3, i32 5, i32 7>
+ ret <8 x i64> %s7
+}
+