1 files changed, 37 insertions, 0 deletions
diff --git a/test/CodeGen/R600/unroll.ll b/test/CodeGen/R600/unroll.ll
new file mode 100644
index 0000000..e0035ea
--- /dev/null
+++ b/test/CodeGen/R600/unroll.ll
@@ -0,0 +1,37 @@
+; RUN: opt -loop-unroll -simplifycfg -sroa %s -S -o - | FileCheck %s
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-v16:16:16-v24:32:32-v32:32:32-v48:64:64-v64:64:64-v96:128:128-v128:128:128-v192:256:256-v256:256:256-v512:512:512-v1024:1024:1024-v2048:2048:2048-n32:64"
+target triple = "r600--"
+
+; This test contains a simple loop that initializes an array declared in
+; private memory.  We want to make sure these kinds of loops are always
+; unrolled, because private memory is slow.
+
+; CHECK-LABEL: @test
+; CHECK-NOT: alloca
+; CHECK: store i32 5, i32 addrspace(1)* %out
+define void @test(i32 addrspace(1)* %out) {
+entry:
+  %0 = alloca [32 x i32]
+  br label %loop.header
+
+loop.header:
+  %counter = phi i32 [0, %entry], [%inc, %loop.inc]
+  br label %loop.body
+
+loop.body:
+  %ptr = getelementptr [32 x i32]* %0, i32 0, i32 %counter
+  store i32 %counter, i32* %ptr
+  br label %loop.inc
+
+loop.inc:
+  %inc = add i32 %counter, 1
+  %1 = icmp sge i32 %counter, 32
+  br i1 %1, label  %exit, label %loop.header
+
+exit:
+  %2 = getelementptr [32 x i32]* %0, i32 0, i32 5
+  %3 = load i32* %2
+  store i32 %3, i32 addrspace(1)* %out
+  ret void
+}