AMDGPU: Error on calls from graphics shaders
In principle nothing should stop these from working, but
work is necessary to create an ABI for dealing with the stack
related registers.
llvm-svn: 335829
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 2936e17..9481e2c 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -2310,6 +2310,13 @@
"unsupported required tail call to function ");
}
+ if (AMDGPU::isShader(MF.getFunction().getCallingConv())) {
+ // Note the issue is with the CC of the calling function, not of the call
+ // itself.
+ return lowerUnhandledCall(CLI, InVals,
+ "unsupported call from graphics shader of function ");
+ }
+
// The first 4 bytes are reserved for the callee's emergency stack slot.
const unsigned CalleeUsableStackOffset = 4;
diff --git a/llvm/test/CodeGen/AMDGPU/unsupported-calls.ll b/llvm/test/CodeGen/AMDGPU/unsupported-calls.ll
index 68872c5..434ba03 100644
--- a/llvm/test/CodeGen/AMDGPU/unsupported-calls.ll
+++ b/llvm/test/CodeGen/AMDGPU/unsupported-calls.ll
@@ -67,3 +67,10 @@
call void %fptr()
ret void
}
+
+; GCN: :0:0: in function test_call_from_shader i32 (): unsupported call from graphics shader of function defined_function
+; R600: in function test_call{{.*}}: unsupported call to function defined_function
+define amdgpu_ps i32 @test_call_from_shader() {
+ %call = call i32 @defined_function(i32 0)
+ ret i32 %call
+}