From: Craig Topper <craig.topper@intel.com>
Date: Thu, 15 Jun 2017 17:27:56 +0000 (+0000)
Subject: [BasicAA] Add test case that goes with r305481.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c9069cd453440161a86ff5af7be1f12a3869baff;p=llvm

[BasicAA] Add test case that goes with r305481.

Forgot to 'git add' the file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305483 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Transforms/GVN/pr32314.ll b/test/Transforms/GVN/pr32314.ll
new file mode 100644
index 00000000000..90d14f6fc49
--- /dev/null
+++ b/test/Transforms/GVN/pr32314.ll
@@ -0,0 +1,53 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -gvn < %s | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; The load in the loop can not bypass the data from the previous loop. The store above it in the loop aliases.
+define void @foo() {
+; CHECK-LABEL: @foo(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[A:%.*]] = alloca [3 x i32], align 4
+; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
+; CHECK:       for.cond.cleanup:
+; CHECK-NEXT:    ret void
+; CHECK:       for.body:
+; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 1, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
+; CHECK-NEXT:    [[P_017:%.*]] = phi i32* [ undef, [[ENTRY]] ], [ [[ARRAYIDX3:%.*]], [[FOR_BODY]] ]
+; CHECK-NEXT:    [[TMP0:%.*]] = add nsw i64 [[INDVARS_IV]], -1
+; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds [3 x i32], [3 x i32]* [[A]], i64 0, i64 [[TMP0]]
+; CHECK-NEXT:    store i32 50, i32* [[ARRAYIDX]], align 4
+; CHECK-NEXT:    [[TMP1:%.*]] = shl i64 [[INDVARS_IV]], 1
+; CHECK-NEXT:    [[TMP2:%.*]] = load i32, i32* [[P_017]], align 4
+; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[TMP1]] to i32
+; CHECK-NEXT:    [[ADD1:%.*]] = add nsw i32 [[TMP2]], [[TMP3]]
+; CHECK-NEXT:    [[ARRAYIDX3]] = getelementptr inbounds [3 x i32], [3 x i32]* [[A]], i64 0, i64 [[INDVARS_IV]]
+; CHECK-NEXT:    store i32 60, i32* [[ARRAYIDX3]], align 4
+; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
+; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], 3
+; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP:%.*]]
+;
+entry:
+  %a = alloca [3 x i32], align 4
+  br label %for.body
+
+for.cond.cleanup:                                 ; preds = %for.body
+  ret void
+
+for.body:                                         ; preds = %for.body, %entry
+  %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
+  %p.017 = phi i32* [ undef, %entry ], [ %arrayidx3, %for.body ]
+  %0 = add nsw i64 %indvars.iv, -1
+  %arrayidx = getelementptr inbounds [3 x i32], [3 x i32]* %a, i64 0, i64 %0
+  store i32 50, i32* %arrayidx, align 4
+  %1 = shl i64 %indvars.iv, 1
+  %2 = load i32, i32* %p.017, align 4
+  %3 = trunc i64 %1 to i32
+  %add1 = add nsw i32 %2, %3
+  %arrayidx3 = getelementptr inbounds [3 x i32], [3 x i32]* %a, i64 0, i64 %indvars.iv
+  store i32 60, i32* %arrayidx3, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond = icmp ne i64 %indvars.iv.next, 3
+  br i1 %exitcond, label %for.body, label %for.cond.cleanup
+}