enhance codegen to put 16-bit character strings into the

[oota-llvm.git] / lib / Target / XCore / XCoreInstrInfo.td

diff --git a/lib/Target/XCore/XCoreInstrInfo.td b/lib/Target/XCore/XCoreInstrInfo.td
index 316d0566e8239056770bbabcd2be59704849f09b..9d9cbf0e8e1d52d2b4e2af079916c0f0423a66ea 100644 (file)
--- a/lib/Target/XCore/XCoreInstrInfo.td
+++ b/lib/Target/XCore/XCoreInstrInfo.td
@@ -95,6 +95,12 @@ def neg_xform : SDNodeXForm<imm, [{
   return getI32Imm(-value);
 }]>;
 
+def bpwsub_xform : SDNodeXForm<imm, [{
+  // Transformation function: 32-imm
+  uint32_t value = N->getZExtValue();
+  return getI32Imm(32-value);
+}]>;
+
 def div4neg_xform : SDNodeXForm<imm, [{
   // Transformation function: -imm/4
   uint32_t value = N->getZExtValue();
@@ -162,6 +168,14 @@ def immBitp : PatLeaf<(imm), [{
           || value == 32;
 }]>;
 
+def immBpwSubBitp : PatLeaf<(imm), [{
+  uint32_t value = (uint32_t)N->getZExtValue();
+  return (value >= 24 && value <= 31)
+          || value == 16
+          || value == 8
+          || value == 0;
+}]>;
+
 def lda16f : PatFrag<(ops node:$addr, node:$offset),
                      (add node:$addr, (shl node:$offset, 1))>;
 def lda16b : PatFrag<(ops node:$addr, node:$offset),
@@ -989,3 +1003,5 @@ def : Pat<(mul GRRegs:$src, -3),
 def : Pat<(sra GRRegs:$src, 31),
           (ASHR_l2rus GRRegs:$src, 32)>;
 
+def : Pat<(sra (shl GRRegs:$src, immBpwSubBitp:$imm), immBpwSubBitp:$imm),
+          (SEXT_rus GRRegs:$src, (bpwsub_xform immBpwSubBitp:$imm))>;