From 526957f4ed99214aa1383faed72d837abf9a8abf Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Mon, 23 May 2016 22:09:04 +0000
Subject: [InstSimplify] add vector tests for isKnownNonZero

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270498 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstSimplify/vec-cmp.ll | 81 +++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 test/Transforms/InstSimplify/vec-cmp.ll

diff --git a/test/Transforms/InstSimplify/vec-cmp.ll b/test/Transforms/InstSimplify/vec-cmp.ll
new file mode 100644
index 00000000000..1fa817775d6
--- /dev/null
+++ b/test/Transforms/InstSimplify/vec-cmp.ll
@@ -0,0 +1,81 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instsimplify -S | FileCheck %s
+
+; FIXME: isKnownNonZero should work for integer vectors.
+
+define <2 x i1> @nonzero_vec_splat(<2 x i32> %x) {
+; CHECK-LABEL: @nonzero_vec_splat(
+; CHECK-NEXT:    [[Y:%.*]] = or <2 x i32> %x, <i32 1, i32 1>
+; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i32> [[Y]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %y = or <2 x i32> %x, <i32 1, i32 1>
+  %c = icmp eq <2 x i32> %y, zeroinitializer
+  ret <2 x i1> %c
+}
+
+define <2 x i1> @nonzero_vec_nonsplat(<2 x i32> %x) {
+; CHECK-LABEL: @nonzero_vec_nonsplat(
+; CHECK-NEXT:    [[Y:%.*]] = or <2 x i32> %x, <i32 2, i32 1>
+; CHECK-NEXT:    [[C:%.*]] = icmp ne <2 x i32> [[Y]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %y = or <2 x i32> %x, <i32 2, i32 1>
+  %c = icmp ne <2 x i32> %y, zeroinitializer
+  ret <2 x i1> %c
+}
+
+define <2 x i1> @nonzero_vec_undef_elt(<2 x i32> %x) {
+; CHECK-LABEL: @nonzero_vec_undef_elt(
+; CHECK-NEXT:    [[Y:%.*]] = or <2 x i32> %x, <i32 undef, i32 1>
+; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i32> [[Y]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %y = or <2 x i32> %x, <i32 undef, i32 1>
+  %c = icmp eq <2 x i32> %y, zeroinitializer
+  ret <2 x i1> %c
+}
+
+define <2 x i1> @may_be_zero_vec(<2 x i32> %x) {
+; CHECK-LABEL: @may_be_zero_vec(
+; CHECK-NEXT:    [[Y:%.*]] = or <2 x i32> %x, <i32 0, i32 1>
+; CHECK-NEXT:    [[C:%.*]] = icmp ne <2 x i32> [[Y]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %y = or <2 x i32> %x, <i32 0, i32 1>
+  %c = icmp ne <2 x i32> %y, zeroinitializer
+  ret <2 x i1> %c
+}
+
+; Multiplies of non-zero numbers are non-zero if there is no unsigned overflow.
+define <2 x i1> @nonzero_vec_mul_nuw(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @nonzero_vec_mul_nuw(
+; CHECK-NEXT:    [[XNZ:%.*]] = or <2 x i32> %x, <i32 1, i32 2>
+; CHECK-NEXT:    [[YNZ:%.*]] = or <2 x i32> %y, <i32 3, i32 undef>
+; CHECK-NEXT:    [[M:%.*]] = mul nuw <2 x i32> [[XNZ]], [[YNZ]]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq <2 x i32> [[M]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %xnz = or <2 x i32> %x, <i32 1, i32 2>
+  %ynz = or <2 x i32> %y, <i32 3, i32 undef>
+  %m = mul nuw <2 x i32> %xnz, %ynz
+  %c = icmp eq <2 x i32> %m, zeroinitializer
+  ret <2 x i1> %c
+}
+
+; Multiplies of non-zero numbers are non-zero if there is no signed overflow.
+define <2 x i1> @nonzero_vec_mul_nsw(<2 x i32> %x, <2 x i32> %y) {
+; CHECK-LABEL: @nonzero_vec_mul_nsw(
+; CHECK-NEXT:    [[XNZ:%.*]] = or <2 x i32> %x, <i32 undef, i32 2>
+; CHECK-NEXT:    [[YNZ:%.*]] = or <2 x i32> %y, <i32 3, i32 4>
+; CHECK-NEXT:    [[M:%.*]] = mul nsw <2 x i32> [[XNZ]], [[YNZ]]
+; CHECK-NEXT:    [[C:%.*]] = icmp ne <2 x i32> [[M]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %xnz = or <2 x i32> %x, <i32 undef, i32 2>
+  %ynz = or <2 x i32> %y, <i32 3, i32 4>
+  %m = mul nsw <2 x i32> %xnz, %ynz
+  %c = icmp ne <2 x i32> %m, zeroinitializer
+  ret <2 x i1> %c
+}
+
-- 
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