vendor/llvm/llvm-trunk-r240225

1 files changed, 34 insertions, 0 deletions

diff --git a/test/CodeGen/AMDGPU/endcf-loop-header.ll b/test/CodeGen/AMDGPU/endcf-loop-header.ll
new file mode 100644
index 000000000000..267a323c5063
--- /dev/null
+++ b/test/CodeGen/AMDGPU/endcf-loop-header.ll
@@ -0,0 +1,34 @@
+; RUN: llc < %s -march=amdgcn -mcpu=SI -verify-machineinstrs | FileCheck %s
+
+; This tests that the llvm.SI.end.cf intrinsic is not inserted into the
+; loop block.  This intrinsic will be lowered to s_or_b64 by the code
+; generator.
+
+; CHECK-LABEL: {{^}}test:
+
+; This is was lowered from the llvm.SI.end.cf intrinsic:
+; CHECK: s_or_b64 exec, exec
+
+; CHECK: [[LOOP_LABEL:[0-9A-Za-z_]+]]: ; %loop{{$}}
+; CHECK-NOT: s_or_b64 exec, exec
+; CHECK: s_cbranch_execnz [[LOOP_LABEL]]
+define void @test(i32 addrspace(1)* %out, i32 %cond) {
+entry:
+  %tmp0 = icmp eq i32 %cond, 0
+  br i1 %tmp0, label %if, label %loop
+
+if:
+  store i32 0, i32 addrspace(1)* %out
+  br label %loop
+
+loop:
+  %tmp1 = phi i32 [0, %entry], [0, %if], [%inc, %loop]
+  %inc = add i32 %tmp1, %cond
+  %tmp2 = icmp ugt i32 %inc, 10
+  br i1 %tmp2, label %done, label %loop
+
+done:
+  %tmp3 = getelementptr i32, i32 addrspace(1)* %out, i64 1
+  store i32 %inc, i32 addrspace(1)* %tmp3
+  ret void
+}