[llvm] a19b27b - [PhaseOrdering] add test for vector trunc; NFC

[Sanjay Patel via llvm-commits]

Author: Sanjay Patel
Date: 2020-04-02T08:13:19-04:00
New Revision: a19b27b90e5eff48f500b58f04f9969ea54a2fed

URL: https://github.com/llvm/llvm-project/commit/a19b27b90e5eff48f500b58f04f9969ea54a2fed
DIFF: https://github.com/llvm/llvm-project/commit/a19b27b90e5eff48f500b58f04f9969ea54a2fed.diff

LOG: [PhaseOrdering] add test for vector trunc; NFC
See discussion in D76983.

Added: 
    llvm/test/Transforms/PhaseOrdering/vector-trunc.ll

Modified: 
    

Removed: 
    


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diff  --git a/llvm/test/Transforms/PhaseOrdering/vector-trunc.ll b/llvm/test/Transforms/PhaseOrdering/vector-trunc.ll
new file mode 100644
index 000000000000..494b9a7a6c0b
--- /dev/null
+++ b/llvm/test/Transforms/PhaseOrdering/vector-trunc.ll
@@ -0,0 +1,24 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -O2                   -S -data-layout="e" < %s | FileCheck %s --check-prefixes=ANY,OLDPM
+; RUN: opt -passes='default<O2>' -S -data-layout="e" < %s | FileCheck %s --check-prefixes=ANY,NEWPM
+
+define <4 x i16> @truncate(<4 x i32> %x) {
+; ANY-LABEL: @truncate(
+; ANY-NEXT:    [[TMP1:%.*]] = bitcast <4 x i32> [[X:%.*]] to <8 x i16>
+; ANY-NEXT:    [[V3:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
+; ANY-NEXT:    ret <4 x i16> [[V3]]
+;
+  %x0 = extractelement <4 x i32> %x, i32 0
+  %t0 = trunc i32 %x0 to i16
+  %v0 = insertelement <4 x i16> undef, i16 %t0, i32 0
+  %x1 = extractelement <4 x i32> %x, i32 1
+  %t1 = trunc i32 %x1 to i16
+  %v1 = insertelement <4 x i16> %v0, i16 %t1, i32 1
+  %x2 = extractelement <4 x i32> %x, i32 2
+  %t2 = trunc i32 %x2 to i16
+  %v2 = insertelement <4 x i16> %v1, i16 %t2, i32 2
+  %x3 = extractelement <4 x i32> %x, i32 3
+  %t3 = trunc i32 %x3 to i16
+  %v3 = insertelement <4 x i16> %v2, i16 %t3, i32 3
+  ret <4 x i16> %v3
+}