R600/SI: Fix assertion on infinite loops.
This isn't the most useful case to fix in the real world,
but bugpoint runs into this.
llvm-svn: 201177
diff --git a/llvm/test/CodeGen/R600/infinite-loop.ll b/llvm/test/CodeGen/R600/infinite-loop.ll
new file mode 100644
index 0000000..a60bc37
--- /dev/null
+++ b/llvm/test/CodeGen/R600/infinite-loop.ll
@@ -0,0 +1,17 @@
+; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
+
+; SI-LABEL: @infinite_loop:
+; SI: V_MOV_B32_e32 [[REG:v[0-9]+]], 999
+; SI: BB0_1:
+; SI: BUFFER_STORE_DWORD [[REG]]
+; SI: S_WAITCNT vmcnt(0) expcnt(0)
+; SI: S_BRANCH BB0_1
+define void @infinite_loop(i32 addrspace(1)* %out) {
+entry:
+ br label %for.body
+
+for.body: ; preds = %entry, %for.body
+ store i32 999, i32 addrspace(1)* %out, align 4
+ br label %for.body
+}
+