[WebAssembly] Mark the ARGUMENT pseudo-instructions as CodeGenOnly.

[oota-llvm.git] / lib / Target / WebAssembly / WebAssemblyInstrInfo.td

diff --git a/lib/Target/WebAssembly/WebAssemblyInstrInfo.td b/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
index 9d59519822048dec39f8a74cdc7df0cff810f121..f0b4ce7caf5199f55e42eac844f1ba6faa71a82f 100644 (file)
--- a/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
+++ b/lib/Target/WebAssembly/WebAssemblyInstrInfo.td
@@ -30,7 +30,7 @@ def SDT_WebAssemblyCallSeqEnd :
     SDCallSeqEnd<[SDTCisVT<0, iPTR>, SDTCisVT<1, iPTR>]>;
 def SDT_WebAssemblyCall0    : SDTypeProfile<0, -1, [SDTCisPtrTy<0>]>;
 def SDT_WebAssemblyCall1    : SDTypeProfile<1, -1, [SDTCisPtrTy<1>]>;
-def SDT_WebAssemblySwitch   : SDTypeProfile<0, -1, [SDTCisPtrTy<0>]>;
+def SDT_WebAssemblyTableswitch : SDTypeProfile<0, -1, [SDTCisPtrTy<0>]>;
 def SDT_WebAssemblyArgument : SDTypeProfile<1, 1, [SDTCisVT<1, i32>]>;
 def SDT_WebAssemblyReturn   : SDTypeProfile<0, -1, []>;
 def SDT_WebAssemblyWrapper  : SDTypeProfile<1, 1, [SDTCisSameAs<0, 1>,
@@ -52,9 +52,9 @@ def WebAssemblycall0 : SDNode<"WebAssemblyISD::CALL0",
 def WebAssemblycall1 : SDNode<"WebAssemblyISD::CALL1",
                               SDT_WebAssemblyCall1,
                               [SDNPHasChain, SDNPVariadic]>;
-def WebAssemblyswitch : SDNode<"WebAssemblyISD::SWITCH",
-                               SDT_WebAssemblySwitch,
-                               [SDNPHasChain, SDNPVariadic]>;
+def WebAssemblytableswitch : SDNode<"WebAssemblyISD::TABLESWITCH",
+                                    SDT_WebAssemblyTableswitch,
+                                    [SDNPHasChain, SDNPVariadic]>;
 def WebAssemblyargument : SDNode<"WebAssemblyISD::ARGUMENT",
                                  SDT_WebAssemblyArgument>;
 def WebAssemblyreturn   : SDNode<"WebAssemblyISD::RETURN",
@@ -66,16 +66,7 @@ def WebAssemblywrapper  : SDNode<"WebAssemblyISD::Wrapper",
 // WebAssembly-specific Operands.
 //===----------------------------------------------------------------------===//
 
-/*
- * TODO(jfb): Add the following.
- *
- * get_local: read the current value of a local variable
- * set_local: set the current value of a local variable
-*/
-
 def bb_op : Operand<OtherVT>;
-def tjumptable_op : Operand<iPTR>;
-def global : Operand<iPTR>;
 
 //===----------------------------------------------------------------------===//
 // WebAssembly Instruction Format Definitions.
@@ -83,7 +74,12 @@ def global : Operand<iPTR>;
 
 include "WebAssemblyInstrFormats.td"
 
+//===----------------------------------------------------------------------===//
+// Additional instructions.
+//===----------------------------------------------------------------------===//
+
 multiclass ARGUMENT<WebAssemblyRegClass vt> {
+  let hasSideEffects = 1, Uses = [ARGUMENTS], isCodeGenOnly = 1 in
   def ARGUMENT_#vt : I<(outs vt:$res), (ins i32imm:$argno),
                        [(set vt:$res, (WebAssemblyargument timm:$argno))]>;
 }
@@ -92,7 +88,32 @@ defm : ARGUMENT<I64>;
 defm : ARGUMENT<F32>;
 defm : ARGUMENT<F64>;
 
+let Defs = [ARGUMENTS] in {
+
+// get_local and set_local are not generated by instruction selection; they
+// are implied by virtual register uses and defs in most contexts. However,
+// they are explicitly emitted for special purposes.
+multiclass LOCAL<WebAssemblyRegClass vt> {
+  def GET_LOCAL_#vt : I<(outs vt:$res), (ins i32imm:$regno), [],
+                        "get_local\t$res, $regno">;
+  // TODO: set_local returns its operand value
+  def SET_LOCAL_#vt : I<(outs), (ins i32imm:$regno, vt:$src), [],
+                        "set_local\t$regno, $src">;
+
+  // COPY_LOCAL is not an actual instruction in wasm, but since we allow
+  // get_local and set_local to be implicit, we can have a COPY_LOCAL which
+  // is actually a no-op because all the work is done in the implied
+  // get_local and set_local.
+  let isAsCheapAsAMove = 1 in
+  def COPY_LOCAL_#vt : I<(outs vt:$res), (ins vt:$src), [],
+                         "copy_local\t$res, $src">;
+}
+defm : LOCAL<I32>;
+defm : LOCAL<I64>;
+defm : LOCAL<F32>;
+defm : LOCAL<F64>;
 
+let isMoveImm = 1 in {
 def CONST_I32 : I<(outs I32:$res), (ins i32imm:$imm),
                   [(set I32:$res, imm:$imm)],
                   "i32.const\t$res, $imm">;
@@ -105,14 +126,25 @@ def CONST_F32 : I<(outs F32:$res), (ins f32imm:$imm),
 def CONST_F64 : I<(outs F64:$res), (ins f64imm:$imm),
                   [(set F64:$res, fpimm:$imm)],
                   "f64.const\t$res, $imm">;
+} // isMoveImm = 1
 
+} // Defs = [ARGUMENTS]
 
-def : Pat<(i32 (WebAssemblywrapper tglobaladdr :$dst)),
-          (CONST_I32 tglobaladdr :$dst)>;
+def : Pat<(i32 (WebAssemblywrapper tglobaladdr:$dst)),
+          (CONST_I32 tglobaladdr:$dst)>;
+def : Pat<(i32 (WebAssemblywrapper texternalsym:$dst)),
+          (CONST_I32 texternalsym:$dst)>;
+def : Pat<(i32 (WebAssemblywrapper tjumptable:$dst)),
+          (CONST_I32 tjumptable:$dst)>;
 
-def JUMP_TABLE : I<(outs I32:$dst), (ins tjumptable_op:$addr),
-                   [(set I32:$dst, (WebAssemblywrapper tjumptable:$addr))],
-                   "jump_table\t$dst, $addr">;
+let Defs = [ARGUMENTS] in {
+
+// Function signature and local variable declaration "instructions".
+def PARAM  : I<(outs), (ins variable_ops), [], ".param  \t">;
+def RESULT : I<(outs), (ins variable_ops), [], ".result \t">;
+def LOCAL  : I<(outs), (ins variable_ops), [], ".local  \t">;
+
+} // Defs = [ARGUMENTS]
 
 //===----------------------------------------------------------------------===//
 // Additional sets of instructions.
@@ -122,7 +154,7 @@ include "WebAssemblyInstrMemory.td"
 include "WebAssemblyInstrCall.td"
 include "WebAssemblyInstrControl.td"
 include "WebAssemblyInstrInteger.td"
-include "WebAssemblyInstrFloat.td"
 include "WebAssemblyInstrConv.td"
+include "WebAssemblyInstrFloat.td"
 include "WebAssemblyInstrAtomics.td"
 include "WebAssemblyInstrSIMD.td"