Similar to bitcast, treat addrspacecast as a foldable operand.

Added a test sink-addrspacecast.ll to verify this change.

Patch by Jingyue Wu.

llvm-svn: 209343

1 files changed, 37 insertions, 0 deletions

diff --git a/llvm/test/Transforms/CodeGenPrepare/X86/sink-addrspacecast.ll b/llvm/test/Transforms/CodeGenPrepare/X86/sink-addrspacecast.ll
new file mode 100644
index 00000000000..a985c36707a
--- /dev/null
+++ b/llvm/test/Transforms/CodeGenPrepare/X86/sink-addrspacecast.ll
@@ -0,0 +1,37 @@
+; RUN: opt -S -codegenprepare < %s | FileCheck %s
+
+target datalayout =
+"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; CHECK-LABEL: @load_cast_gep
+; CHECK: add i64 %sunkaddr, 40
+define void @load_cast_gep(i1 %cond, i64* %base) {
+entry:
+  %addr = getelementptr inbounds i64* %base, i64 5
+  %casted = addrspacecast i64* %addr to i32 addrspace(1)*
+  br i1 %cond, label %if.then, label %fallthrough
+
+if.then:
+  %v = load i32 addrspace(1)* %casted, align 4
+  br label %fallthrough
+
+fallthrough:
+  ret void
+}
+
+; CHECK-LABEL: @store_gep_cast
+; CHECK: add i64 %sunkaddr, 20
+define void @store_gep_cast(i1 %cond, i64* %base) {
+entry:
+  %casted = addrspacecast i64* %base to i32 addrspace(1)*
+  %addr = getelementptr inbounds i32 addrspace(1)* %casted, i64 5
+  br i1 %cond, label %if.then, label %fallthrough
+
+if.then:
+  store i32 0, i32 addrspace(1)* %addr, align 4
+  br label %fallthrough
+
+fallthrough:
+  ret void
+}