From 16e4ed5879da57502ea3686c79c63f86994fbe75 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Wed, 31 Jul 2013 17:49:08 +0000
Subject: Reject bitcasts between address spaces with different sizes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187506 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../bitcast-address-space-nested-global-cycle.ll        |  8 ++++++++
 test/Verifier/bitcast-address-space-nested-global.ll    | 11 +++++++++++
 ...-through-constant-inttoptr-inside-gep-instruction.ll | 10 ++++++++++
 .../bitcast-address-space-through-constant-inttoptr.ll  | 11 +++++++++++
 test/Verifier/bitcast-address-space-through-gep-2.ll    | 17 +++++++++++++++++
 test/Verifier/bitcast-address-space-through-gep.ll      | 13 +++++++++++++
 test/Verifier/bitcast-address-space-through-inttoptr.ll |  9 +++++++++
 test/Verifier/bitcast-address-spaces.ll                 |  9 +++++++++
 test/Verifier/bitcast-vector-pointer-as.ll              |  9 +++++++++
 9 files changed, 97 insertions(+)
 create mode 100644 test/Verifier/bitcast-address-space-nested-global-cycle.ll
 create mode 100644 test/Verifier/bitcast-address-space-nested-global.ll
 create mode 100644 test/Verifier/bitcast-address-space-through-constant-inttoptr-inside-gep-instruction.ll
 create mode 100644 test/Verifier/bitcast-address-space-through-constant-inttoptr.ll
 create mode 100644 test/Verifier/bitcast-address-space-through-gep-2.ll
 create mode 100644 test/Verifier/bitcast-address-space-through-gep.ll
 create mode 100644 test/Verifier/bitcast-address-space-through-inttoptr.ll
 create mode 100644 test/Verifier/bitcast-address-spaces.ll
 create mode 100644 test/Verifier/bitcast-vector-pointer-as.ll

(limited to 'test/Verifier')

diff --git a/test/Verifier/bitcast-address-space-nested-global-cycle.ll b/test/Verifier/bitcast-address-space-nested-global-cycle.ll
new file mode 100644
index 0000000..0cee726
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-nested-global-cycle.ll
@@ -0,0 +1,8 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+%struct.Self1 = type { %struct.Self1 addrspace(1)* }
+
+@cycle1 = addrspace(1) constant %struct.Self1 { %struct.Self1 addrspace(1)* bitcast (%struct.Self1 addrspace(0)* @cycle0 to %struct.Self1 addrspace(1)*) }
+@cycle0 = addrspace(0) constant %struct.Self1 { %struct.Self1 addrspace(1)* @cycle1 }
diff --git a/test/Verifier/bitcast-address-space-nested-global.ll b/test/Verifier/bitcast-address-space-nested-global.ll
new file mode 100644
index 0000000..abe9d94
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-nested-global.ll
@@ -0,0 +1,11 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+
+%struct.Self1 = type { %struct.Self1 addrspace(1)* }
+
+@nestedD = constant %struct.Self1 { %struct.Self1 addrspace(1)* bitcast (%struct.Self1 addrspace(0)* @nestedC to %struct.Self1 addrspace(1)*) }
+@nestedC = constant %struct.Self1 { %struct.Self1 addrspace(1)* bitcast (%struct.Self1 addrspace(0)* @nestedB to %struct.Self1 addrspace(1)*) }
+@nestedB = constant %struct.Self1 { %struct.Self1 addrspace(1)* bitcast (%struct.Self1 addrspace(0)* @nestedA to %struct.Self1 addrspace(1)*) }
+@nestedA = constant %struct.Self1 { %struct.Self1 addrspace(1)* null }
diff --git a/test/Verifier/bitcast-address-space-through-constant-inttoptr-inside-gep-instruction.ll b/test/Verifier/bitcast-address-space-through-constant-inttoptr-inside-gep-instruction.ll
new file mode 100644
index 0000000..ed71afa
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-through-constant-inttoptr-inside-gep-instruction.ll
@@ -0,0 +1,10 @@
+; RUN: not llvm-as -verify -disable-output < %s
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+; Check that we can find inttoptr -> illegal bitcasts when hidden
+; inside constantexpr pointer operands
+define i32 addrspace(2)* @illegal_bitcast_inttoptr_as_1_to_2_inside_gep() {
+  %cast = getelementptr i32 addrspace(2)* bitcast (i32 addrspace(1)* inttoptr (i32 1234 to i32 addrspace(1)*) to i32 addrspace(2)*), i32 3
+  ret i32 addrspace(2)* %cast
+}
+
diff --git a/test/Verifier/bitcast-address-space-through-constant-inttoptr.ll b/test/Verifier/bitcast-address-space-through-constant-inttoptr.ll
new file mode 100644
index 0000000..e65c71e
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-through-constant-inttoptr.ll
@@ -0,0 +1,11 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+
+%struct.Foo = type { i32 addrspace(1)* }
+
+; Make sure we still reject the bitcast when the source is a inttoptr (constant int) in a global initializer
+@bitcast_after_constant_inttoptr_initializer = global %struct.Foo { i32 addrspace(1)* bitcast (i32 addrspace(2)* inttoptr (i8 7 to i32 addrspace(2)*) to i32 addrspace(1)*) }
+
+
diff --git a/test/Verifier/bitcast-address-space-through-gep-2.ll b/test/Verifier/bitcast-address-space-through-gep-2.ll
new file mode 100644
index 0000000..3b77d9a
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-through-gep-2.ll
@@ -0,0 +1,17 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-p3:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+
+%struct.Foo1 = type { i32 addrspace(1)* }
+
+@as2_array = addrspace(2) global [32 x i32] zeroinitializer
+
+; gep -> legal bitcast (2 -> 3) -> gep -> illegal bitcast (3 -> 1)
+@bitcast_after_gep_bitcast_gep =
+         global %struct.Foo1 { i32 addrspace(1)* bitcast
+                                    (i32 addrspace(3)* getelementptr
+                                         (i32 addrspace(3)* bitcast
+                                              (i32 addrspace(2)* getelementptr
+                                                   ([32 x i32] addrspace(2)* @as2_array, i32 0, i32 8) to i32 addrspace(3)*), i32 3) to i32 addrspace(1)*) }
+
diff --git a/test/Verifier/bitcast-address-space-through-gep.ll b/test/Verifier/bitcast-address-space-through-gep.ll
new file mode 100644
index 0000000..8e950dc
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-through-gep.ll
@@ -0,0 +1,13 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+%struct.Foo = type { i32 addrspace(1)* }
+
+
+@as2_array = addrspace(2) global [32 x i32] zeroinitializer
+
+; Make sure we still reject the bitcast after the value is accessed through a GEP
+@bitcast_after_gep = global %struct.Foo { i32 addrspace(1)* bitcast (i32 addrspace(2)* getelementptr ([32 x i32] addrspace(2)* @as2_array, i32 0, i32 8) to i32 addrspace(1)*) }
+
+
diff --git a/test/Verifier/bitcast-address-space-through-inttoptr.ll b/test/Verifier/bitcast-address-space-through-inttoptr.ll
new file mode 100644
index 0000000..bec4048
--- /dev/null
+++ b/test/Verifier/bitcast-address-space-through-inttoptr.ll
@@ -0,0 +1,9 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:8:8:8-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+define i32 addrspace(2)* @illegal_bitcast_as_1_to_2_inttoptr() {
+   %cast = bitcast i32 addrspace(1)* inttoptr (i32 5 to i32 addrspace(1)*) to i32 addrspace(2)*
+   ret i32 addrspace(2)* %cast
+}
+
diff --git a/test/Verifier/bitcast-address-spaces.ll b/test/Verifier/bitcast-address-spaces.ll
new file mode 100644
index 0000000..4508417
--- /dev/null
+++ b/test/Verifier/bitcast-address-spaces.ll
@@ -0,0 +1,9 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+define i32 addrspace(1)* @illegal_bitcast_as_0_to_1(i32 addrspace(0) *%p) {
+  %cast = bitcast i32 addrspace(0)* %p to i32 addrspace(1)*
+  ret i32 addrspace(1)* %cast
+}
+
diff --git a/test/Verifier/bitcast-vector-pointer-as.ll b/test/Verifier/bitcast-vector-pointer-as.ll
new file mode 100644
index 0000000..89070e5
--- /dev/null
+++ b/test/Verifier/bitcast-vector-pointer-as.ll
@@ -0,0 +1,9 @@
+; RUN: not llvm-as -verify -disable-output %s
+
+target datalayout = "e-p:32:32:32-p1:16:16:16-p2:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n8:16:32"
+
+define <4 x i32 addrspace(1)*> @vector_illegal_bitcast_as_0_to_1(<4 x i32 addrspace(0)*> %p) {
+   %cast = bitcast <4 x i32 addrspace(0)*> %p to <4 x i32 addrspace(1)*>
+   ret <4 x i32 addrspace(1)*> %cast
+}
+
-- 
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