1 files changed, 34 insertions, 0 deletions
diff --git a/test/CodeGen/R600/m0-spill.ll b/test/CodeGen/R600/m0-spill.ll
new file mode 100644
index 0000000..a8b0e0d
--- /dev/null
+++ b/test/CodeGen/R600/m0-spill.ll
@@ -0,0 +1,34 @@
+; RUN: llc < %s -march=r600 -mcpu=SI -verify-machineinstrs | FileCheck %s
+
+@lds = external addrspace(3) global [64 x float]
+
+; CHECK-LABEL: {{^}}main:
+; CHECK-NOT: v_readlane_b32 m0
+define void @main(<16 x i8> addrspace(2)* inreg, <16 x i8> addrspace(2)* inreg, <32 x i8> addrspace(2)* inreg, i32 inreg) "ShaderType"="0" {
+main_body:
+  %4 = call float @llvm.SI.fs.constant(i32 0, i32 0, i32 %3)
+  %cmp = fcmp ueq float 0.0, %4
+  br i1 %cmp, label %if, label %else
+
+if:
+  %lds_ptr = getelementptr [64 x float] addrspace(3)* @lds, i32 0, i32 0
+  %lds_data = load float addrspace(3)* %lds_ptr
+  br label %endif
+
+else:
+  %interp = call float @llvm.SI.fs.constant(i32 0, i32 0, i32 %3)
+  br label %endif
+
+endif:
+  %export = phi float [%lds_data, %if], [%interp, %else]
+  %5 = call i32 @llvm.SI.packf16(float %export, float %export)
+  %6 = bitcast i32 %5 to float
+  call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 1, float %6, float %6, float %6, float %6)
+  ret void
+}
+
+declare float @llvm.SI.fs.constant(i32, i32, i32) readnone
+
+declare i32 @llvm.SI.packf16(float, float) readnone
+
+declare void @llvm.SI.export(i32, i32, i32, i32, i32, float, float, float, float)