[llvm] r361103 - GVN: Handle addrspacecast

[Matt Arsenault via llvm-commits]

Author: arsenm
Date: Sat May 18 07:36:06 2019
New Revision: 361103

URL: http://llvm.org/viewvc/llvm-project?rev=361103&view=rev
Log:
GVN: Handle addrspacecast

Added:
    llvm/trunk/test/Transforms/GVN/addrspacecast.ll
Modified:
    llvm/trunk/lib/Transforms/Scalar/GVN.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/GVN.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/GVN.cpp?rev=361103&r1=361102&r2=361103&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/GVN.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/GVN.cpp Sat May 18 07:36:06 2019
@@ -523,6 +523,7 @@ uint32_t GVN::ValueTable::lookupOrAdd(Va
     case Instruction::FPExt:
     case Instruction::PtrToInt:
     case Instruction::IntToPtr:
+    case Instruction::AddrSpaceCast:
     case Instruction::BitCast:
     case Instruction::Select:
     case Instruction::ExtractElement:

Added: llvm/trunk/test/Transforms/GVN/addrspacecast.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/GVN/addrspacecast.ll?rev=361103&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/GVN/addrspacecast.ll (added)
+++ llvm/trunk/test/Transforms/GVN/addrspacecast.ll Sat May 18 07:36:06 2019
@@ -0,0 +1,20 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -gvn -S | FileCheck %s
+; RUN: opt < %s -passes=gvn -S | FileCheck %s
+
+define i32 addrspace(1)* @addrspacecast(i32* %ptr) {
+; CHECK-LABEL: @addrspacecast(
+; CHECK-NEXT:  block1:
+; CHECK-NEXT:    [[Z1:%.*]] = addrspacecast i32* [[PTR:%.*]] to i32 addrspace(1)*
+; CHECK-NEXT:    store i32 addrspace(1)* [[Z1]], i32 addrspace(1)** undef
+; CHECK-NEXT:    ret i32 addrspace(1)* [[Z1]]
+;
+block1:
+  %z1 = addrspacecast i32* %ptr to i32 addrspace(1)*
+  store i32 addrspace(1)* %z1, i32 addrspace(1)** undef
+  br label %block2
+
+block2:
+  %z2 = addrspacecast i32* %ptr to i32 addrspace(1)*
+  ret i32 addrspace(1)* %z2
+}