From d0d2ce942507daf7d3315ef5e070e89f2823f1ef Mon Sep 17 00:00:00 2001
From: Brian Gesiak <modocache@gmail.com>
Date: Thu, 12 Apr 2018 21:28:04 +0000
Subject: Let llvm-diff correctly deal with
 Undef/ConstantAggregateZero/ConstantVector/IndirectBr

Summary:
llvm-diff incorrectly reports that there's a diff when input IR contains undef/zeroinitializer/constantvector/indirectbr.
(This happens even if two identical files are given, e.g. `llvm-diff x.ll x.ll`)

This is fix to the bug report https://bugs.llvm.org/show_bug.cgi?id=33623 .



Reviewers: dexonsmith, rjmccall

Reviewed By: rjmccall

Subscribers: chenwj, mgrang, llvm-commits

Differential Revision: https://reviews.llvm.org/D34856

llvm-svn: 329957
---
 llvm/test/tools/llvm-diff/constantvector.ll     | 16 ++++++++++++++++
 llvm/test/tools/llvm-diff/indirectbr.ll         | 11 +++++++++++
 llvm/test/tools/llvm-diff/undef.ll              | 11 +++++++++++
 llvm/test/tools/llvm-diff/zeroinitializer.bc.ll | 11 +++++++++++
 4 files changed, 49 insertions(+)
 create mode 100644 llvm/test/tools/llvm-diff/constantvector.ll
 create mode 100644 llvm/test/tools/llvm-diff/indirectbr.ll
 create mode 100644 llvm/test/tools/llvm-diff/undef.ll
 create mode 100644 llvm/test/tools/llvm-diff/zeroinitializer.bc.ll

(limited to 'llvm/test/tools/llvm-diff')

diff --git a/llvm/test/tools/llvm-diff/constantvector.ll b/llvm/test/tools/llvm-diff/constantvector.ll
new file mode 100644
index 00000000000..96bb304eccf
--- /dev/null
+++ b/llvm/test/tools/llvm-diff/constantvector.ll
@@ -0,0 +1,16 @@
+; Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=33623
+; RUN: llvm-diff %s %s
+
+%struct.it = type { i64, i64* }
+
+@a_vector = internal global [2 x i64] zeroinitializer, align 16
+
+define i32 @foo(%struct.it* %it) {
+
+entry:
+  %a = getelementptr inbounds %struct.it, %struct.it* %it, i64 0, i32 1
+  %tmp0 = bitcast i64** %a to <2 x i64*>*
+  store <2 x i64*> <i64* getelementptr inbounds ([2 x i64], [2 x i64]* @a_vector, i64 0, i64 0), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @a_vector, i64 0, i64 0)>, <2 x i64*>* %tmp0, align 8
+
+  ret i32 0
+}
diff --git a/llvm/test/tools/llvm-diff/indirectbr.ll b/llvm/test/tools/llvm-diff/indirectbr.ll
new file mode 100644
index 00000000000..cff43fc7eb1
--- /dev/null
+++ b/llvm/test/tools/llvm-diff/indirectbr.ll
@@ -0,0 +1,11 @@
+; Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=33623
+; RUN: llvm-diff %s %s
+
+define i32 @foo(i8*) {
+entry:
+  indirectbr i8* %0, [label %A, label %B, label %entry]
+A:
+  ret i32 1
+B:
+  ret i32 2
+}
diff --git a/llvm/test/tools/llvm-diff/undef.ll b/llvm/test/tools/llvm-diff/undef.ll
new file mode 100644
index 00000000000..607fb1f425e
--- /dev/null
+++ b/llvm/test/tools/llvm-diff/undef.ll
@@ -0,0 +1,11 @@
+; Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=33623
+; RUN: llvm-diff %s %s
+
+%A = type { i64, i64 }
+@_gm_ = global <2 x %A*> zeroinitializer
+
+define void @f() {
+entry:
+  store <2 x %A*> undef, <2 x %A*>* @_gm_
+  ret void
+}
diff --git a/llvm/test/tools/llvm-diff/zeroinitializer.bc.ll b/llvm/test/tools/llvm-diff/zeroinitializer.bc.ll
new file mode 100644
index 00000000000..a6dece35cdc
--- /dev/null
+++ b/llvm/test/tools/llvm-diff/zeroinitializer.bc.ll
@@ -0,0 +1,11 @@
+; Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=33623
+; RUN: llvm-diff %s %s
+
+%A = type { i64, i64 }
+@_gm_ = global <2 x %A*> zeroinitializer
+
+define void @f() {
+entry:
+  store <2 x %A*> zeroinitializer, <2 x %A*>* @_gm_
+  ret void
+}
-- 
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