1 files changed, 51 insertions, 0 deletions
diff --git a/test/CodeGen/AMDGPU/loop-idiom.ll b/test/CodeGen/AMDGPU/loop-idiom.ll
new file mode 100644
index 000000000000..5fd9806813cd
--- /dev/null
+++ b/test/CodeGen/AMDGPU/loop-idiom.ll
@@ -0,0 +1,51 @@
+; RUN: opt -basicaa -loop-idiom -S < %s -march=r600 -mcpu=redwood | FileCheck --check-prefix=R600 --check-prefix=FUNC %s
+; RUN: opt -basicaa -loop-idiom -S < %s -march=amdgcn -mcpu=SI -verify-machineinstrs| FileCheck --check-prefix=SI --check-prefix=FUNC %s
+; RUN: opt -basicaa -loop-idiom -S < %s -march=amdgcn -mcpu=tonga -verify-machineinstrs| FileCheck --check-prefix=SI --check-prefix=FUNC %s
+
+
+; Make sure loop-idiom doesn't create memcpy or memset.  There are no library
+; implementations of these for R600.
+
+; FUNC: @no_memcpy
+; R600-NOT: {{^}}llvm.memcpy
+; SI-NOT: {{^}}llvm.memcpy
+define void @no_memcpy(i8 addrspace(3)* %in, i32 %size) {
+entry:
+  %dest = alloca i8, i32 32
+  br label %for.body
+
+for.body:
+  %0 = phi i32 [0, %entry], [%4, %for.body]
+  %1 = getelementptr i8, i8 addrspace(3)* %in, i32 %0
+  %2 = getelementptr i8, i8* %dest, i32 %0
+  %3 = load i8, i8 addrspace(3)* %1
+  store i8 %3, i8* %2
+  %4 = add i32 %0, 1
+  %5 = icmp eq i32 %4, %size
+  br i1 %5, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; FUNC: @no_memset
+; R600-NOT: {{^}}llvm.memset
+; R600-NOT: {{^}}memset_pattern16:
+; SI-NOT: {{^}}llvm.memset
+; SI-NOT: {{^}}memset_pattern16:
+define void @no_memset(i32 %size) {
+entry:
+  %dest = alloca i8, i32 32
+  br label %for.body
+
+for.body:
+  %0 = phi i32 [0, %entry], [%2, %for.body]
+  %1 = getelementptr i8, i8* %dest, i32 %0
+  store i8 0, i8* %1
+  %2 = add i32 %0, 1
+  %3 = icmp eq i32 %2, %size
+  br i1 %3, label %for.end, label %for.body
+
+for.end:
+  ret void
+}