[XCore] Add ISel pattern for LDWCP

Patch by Robert Lytton.

llvm-svn: 185518

diff --git a/llvm/lib/Target/XCore/XCoreInstrInfo.td b/llvm/lib/Target/XCore/XCoreInstrInfo.td
index be152ae..529fa13 100644 (file)
--- a/llvm/lib/Target/XCore/XCoreInstrInfo.td
+++ b/llvm/lib/Target/XCore/XCoreInstrInfo.td
@@ -279,12 +279,6 @@ multiclass FRU6_LRU6_backwards_branch<bits<6> opc, string OpcStr> {
                     !strconcat(OpcStr, " $a, $b"), []>;
 }
 
-multiclass FRU6_LRU6_cp<bits<6> opc, string OpcStr> {
-  def _ru6: _FRU6<opc, (outs RRegs:$a), (ins i32imm:$b),
-                  !strconcat(OpcStr, " $a, cp[$b]"), []>;
-  def _lru6: _FLRU6<opc, (outs RRegs:$a), (ins i32imm:$b),
-                    !strconcat(OpcStr, " $a, cp[$b]"), []>;
-}
 
 // U6
 multiclass FU6_LU6<bits<10> opc, string OpcStr, SDNode OpNode> {
@@ -539,8 +533,13 @@ def STWDP_lru6 : _FLRU6<0b010100, (outs), (ins RRegs:$a, i32imm:$b),
                         [(store RRegs:$a, (dprelwrapper tglobaladdr:$b))]>;
 
 //let Uses = [CP] in ..
-let mayLoad = 1, isReMaterializable = 1, neverHasSideEffects = 1 in
-defm LDWCP : FRU6_LRU6_cp<0b011011, "ldw">;
+let mayLoad = 1, isReMaterializable = 1, neverHasSideEffects = 1 in {
+def LDWCP_ru6 : _FRU6<0b011011, (outs RRegs:$a), (ins i32imm:$b),
+                        "ldw $a, cp[$b]", []>;
+def LDWCP_lru6: _FLRU6<0b011011, (outs RRegs:$a), (ins i32imm:$b),
+                      "ldw $a, cp[$b]",
+                      [(set RRegs:$a, (load (cprelwrapper tglobaladdr:$b)))]>;
+}
 
 let Uses = [SP] in {
 let mayStore=1 in {

diff --git a/llvm/test/CodeGen/XCore/load.ll b/llvm/test/CodeGen/XCore/load.ll
index faff03b..729fdef 100644 (file)
--- a/llvm/test/CodeGen/XCore/load.ll
+++ b/llvm/test/CodeGen/XCore/load.ll
@@ -39,3 +39,12 @@ entry:
        %2 = zext i8 %1 to i32
        ret i32 %2
 }
+
+@GConst = external constant i32
+define i32 @load_cp() nounwind {
+entry:
+; CHECK: load_cp:
+; CHECK: ldw r0, cp[GConst]
+  %0 = load i32* @GConst
+  ret i32 %0
+}