More CellSPU refinement and progress:

- Cleaned up custom load/store logic, common code is now shared [see note
  below], cleaned up address modes

- More test cases: various intrinsics, structure element access (load/store
  test), updated target data strings, indirect function calls.

Note: This patch contains a refactoring of the LoadSDNode and StoreSDNode
structures: they now share a common base class, LSBaseSDNode, that
provides an interface to their common functionality. There is some hackery
to access the proper operand depending on the derived class; otherwise,
to do a proper job would require finding and rearranging the SDOperands
sent to StoreSDNode's constructor. The current refactor errs on the
side of being conservatively and backwardly compatible while providing
functionality that reduces redundant code for targets where loads and
stores are custom-lowered.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45851 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/CellSPU/struct_1.ll b/test/CodeGen/CellSPU/struct_1.ll
new file mode 100644
index 0000000..1159b55
--- /dev/null
+++ b/test/CodeGen/CellSPU/struct_1.ll
@@ -0,0 +1,107 @@
+; RUN: llvm-as -o - %s | llc -march=cellspu > %t1.s
+; RUN: grep lqa     %t1.s | count 10 &&
+; RUN: grep lqd     %t1.s | count 2 &&
+; RUN: grep rotqbyi %t1.s | count 5 &&
+; RUN: grep xshw    %t1.s | count 1 &&
+; RUN: grep andi    %t1.s | count 4 &&
+; RUN: grep cbd     %t1.s | count 3 &&
+; RUN: grep chd     %t1.s | count 1 &&
+; RUN: grep cwd     %t1.s | count 1 &&
+; RUN: grep shufb   %t1.s | count 5 &&
+; RUN: grep stqa    %t1.s | count 5
+; ModuleID = 'struct_1.bc'
+target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
+target triple = "spu"
+
+; struct hackstate {
+;   unsigned char c1;   // offset 0 (rotate left by 13 bytes to byte 3)
+;   unsigned char c2;   // offset 1 (rotate left by 14 bytes to byte 3)
+;   unsigned char c3;   // offset 2 (rotate left by 15 bytes to byte 3)
+;   int           i1;   // offset 4 (rotate left by 4 bytes to byte 0)
+;   short         s1;   // offset 8 (rotate left by 6 bytes to byte 2)
+;   int           i2;   // offset 12 [ignored]
+;   unsigned char c4;   // offset 16 [ignored]
+;   unsigned char c5;   // offset 17 [ignored]
+;   unsigned char c6;   // offset 18 [ignored]
+;   unsigned char c7;   // offset 19 (no rotate, in preferred slot)
+;   int           i3;   // offset 20 [ignored]
+;   int           i4;   // offset 24 [ignored]
+;   int           i5;   // offset 28 [ignored]
+;   int           i6;   // offset 32 (no rotate, in preferred slot)
+; }
+%struct.hackstate = type { i8, i8, i8, i32, i16, i32, i8, i8, i8, i8, i32, i32, i32, i32 }
+
+; struct hackstate state = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
+@state = global %struct.hackstate zeroinitializer, align 16
+
+define i8 @get_hackstate_c1() zeroext  {
+entry:
+        %tmp2 = load i8* getelementptr (%struct.hackstate* @state, i32 0, i32 0), align 16
+        ret i8 %tmp2
+}
+
+define i8 @get_hackstate_c2() zeroext  {
+entry:
+        %tmp2 = load i8* getelementptr (%struct.hackstate* @state, i32 0, i32 1), align 16
+        ret i8 %tmp2
+}
+
+define i8 @get_hackstate_c3() zeroext  {
+entry:
+        %tmp2 = load i8* getelementptr (%struct.hackstate* @state, i32 0, i32 2), align 16
+        ret i8 %tmp2
+}
+
+define i32 @get_hackstate_i1() {
+entry:
+        %tmp2 = load i32* getelementptr (%struct.hackstate* @state, i32 0, i32 3), align 16
+        ret i32 %tmp2
+}
+
+define i16 @get_hackstate_s1() signext  {
+entry:
+        %tmp2 = load i16* getelementptr (%struct.hackstate* @state, i32 0, i32 4), align 16
+        ret i16 %tmp2
+}
+
+define i8 @get_hackstate_c7() zeroext  {
+entry:
+        %tmp2 = load i8* getelementptr (%struct.hackstate* @state, i32 0, i32 9), align 16
+        ret i8 %tmp2
+}
+
+define i32 @get_hackstate_i6() zeroext  {
+entry:
+        %tmp2 = load i32* getelementptr (%struct.hackstate* @state, i32 0, i32 13), align 16
+        ret i32 %tmp2
+}
+
+define void @set_hackstate_c1(i8 zeroext  %c) {
+entry:
+        store i8 %c, i8* getelementptr (%struct.hackstate* @state, i32 0, i32 0), align 16
+        ret void
+}
+
+define void @set_hackstate_c2(i8 zeroext  %c) {
+entry:
+        store i8 %c, i8* getelementptr (%struct.hackstate* @state, i32 0, i32 1), align 16
+        ret void
+}
+
+define void @set_hackstate_c3(i8 zeroext  %c) {
+entry:
+        store i8 %c, i8* getelementptr (%struct.hackstate* @state, i32 0, i32 2), align 16
+        ret void
+}
+
+define void @set_hackstate_i1(i32 %i) {
+entry:
+        store i32 %i, i32* getelementptr (%struct.hackstate* @state, i32 0, i32 3), align 16
+        ret void
+}
+
+define void @set_hackstate_s1(i16 signext  %s) {
+entry:
+        store i16 %s, i16* getelementptr (%struct.hackstate* @state, i32 0, i32 4), align 16
+        ret void
+}