Test types where old num regs is different from current one

Author: rovka

llvm/test/CodeGen/AMDGPU/sgpr-count-graphics.ll

@@ -0,0 +1,38 @@
+; RUN: llc -global-isel -mtriple=amdgcn-amd-amdpal -mcpu=gfx1200 < %s | FileCheck %s --check-prefixes=CHECK,PACKED16
+; RUN: llc -global-isel -mtriple=amdgcn-amd-amdpal -mcpu=tahiti < %s | FileCheck %s --check-prefixes=CHECK,SPLIT16
+
+@global = addrspace(1) global i32 poison, align 4
+
+; The hardware initializes the registers received as arguments by entry points,
+; so they will be counted even if unused.
+
+; Vectors of i1 are always unpacked
+
+; CHECK-LABEL: vec_of_i1:
+; CHECK:  TotalNumSgprs: 8
+define amdgpu_ps void @vec_of_i1(<8 x i1> inreg %v8i1) {
+  ret void
+}
+
+; Vectors of i8 are always unpacked
+
+; CHECK-LABEL: vec_of_i8:
+; CHECK:  TotalNumSgprs: 4
+define amdgpu_ps void @vec_of_i8(<4 x i8> inreg %v4i8) {
+  ret void
+}
+
+; Vectors of 16-bit types are packed for newer architectures and unpacked for older ones.
+
+; CHECK-LABEL: vec_of_16_bit_ty:
+; PACKED16: TotalNumSgprs: 3
+; SPLIT16:  TotalNumSgprs: 6
+define amdgpu_ps void @vec_of_16_bit_ty(<2 x i16> inreg %v2i16, <4 x half> inreg %v4half) {
+  ret void
+}
+
+; CHECK-LABEL: buffer_fat_ptr:
+; CHECK: TotalNumSgprs: 5
+define amdgpu_ps void @buffer_fat_ptr(ptr addrspace(7) inreg %p) {
+  ret void
+}