ARM: make Darwin libcall registration table driven (NFC)

[oota-llvm.git] / lib / Target / ARM / ARMScheduleSwift.td

diff --git a/lib/Target/ARM/ARMScheduleSwift.td b/lib/Target/ARM/ARMScheduleSwift.td
index 85410ae8478d478113ee8a26ec49d3cd0b3b1efe..6f5740fd13052cc01df62099d5ae8659dd5ad854 100644 (file)
--- a/lib/Target/ARM/ARMScheduleSwift.td
+++ b/lib/Target/ARM/ARMScheduleSwift.td
@@ -25,9 +25,17 @@ def SW_LS   : FuncUnit;
 def SW_IDIV : FuncUnit;
 def SW_FDIV : FuncUnit;
 
-// ===---------------------------------------------------------------------===//
-// This following definitions describe the simple machine model which
-// will replace itineraries.
+// FIXME: Need bypasses.
+// FIXME: Model the multiple stages of IIC_iMOVix2, IIC_iMOVix2addpc, and
+//        IIC_iMOVix2ld better.
+// FIXME: Model the special immediate shifts that are not microcoded.
+// FIXME: Do we need to model the fact that uses of r15 in a micro-op force it
+//        to issue on pipe 1?
+// FIXME: Model the pipelined behavior of CMP / TST instructions.
+// FIXME: Better model the microcode stages of multiply instructions, especially
+//        conditional variants.
+// FIXME: Add preload instruction when it is documented.
+// FIXME: Model non-pipelined nature of FP div / sqrt unit.
 
 // Swift machine model for scheduling and other instruction cost heuristics.
 def SwiftModel : SchedMachineModel {
@@ -512,6 +520,13 @@ let SchedModel = SwiftModel in {
         (instregex "STM(IB|IA|DB|DA)_UPD", "(t2|sys|t)STM(IB|IA|DB|DA)_UPD",
         "PUSH", "tPUSH")>;
 
+  // LDRLIT pseudo instructions, they expand to LDR + PICADD
+  def : InstRW<[SwiftWriteP2ThreeCycle, WriteALU],
+        (instregex "t?LDRLIT_ga_abs", "t?LDRLIT_ga_pcrel")>;
+  // LDRLIT_ga_pcrel_ldr expands to LDR + PICLDR
+  def : InstRW<[SwiftWriteP2ThreeCycle, SwiftWriteP2ThreeCycle],
+        (instregex "LDRLIT_ga_pcrel_ldr")>;
+
   // 4.2.26 Branch
   def : WriteRes<WriteBr, [SwiftUnitP1]> { let Latency = 0; }
   def : WriteRes<WriteBrL, [SwiftUnitP1]> { let Latency = 2; }