[WebAssembly] Make CFG stackification independent of basic-block labels.

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

diff --git a/lib/Target/WebAssembly/WebAssemblyInstrControl.td b/lib/Target/WebAssembly/WebAssemblyInstrControl.td
index 1c06b08597a014adea9f531dffa7dd1deb66acf5..d2852012be1d5b0d3496667b4572dd1d80e1b54b 100644 (file)
--- a/lib/Target/WebAssembly/WebAssemblyInstrControl.td
+++ b/lib/Target/WebAssembly/WebAssemblyInstrControl.td
@@ -42,32 +42,32 @@ let Defs = [ARGUMENTS] in {
 // jump tables, so in practice we don't ever use TABLESWITCH_I64 in wasm32 mode
 // currently.
 // Set TSFlags{0} to 1 to indicate that the variable_ops are immediates.
+// Set TSFlags{2} to 1 to indicate that the immediates represent labels.
 let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
 def TABLESWITCH_I32 : I<(outs), (ins I32:$index, bb_op:$default, variable_ops),
                         [(WebAssemblytableswitch I32:$index, bb:$default)],
                         "tableswitch\t$index, $default"> {
   let TSFlags{0} = 1;
+  let TSFlags{2} = 1;
 }
 def TABLESWITCH_I64 : I<(outs), (ins I64:$index, bb_op:$default, variable_ops),
                         [(WebAssemblytableswitch I64:$index, bb:$default)],
                         "tableswitch\t$index, $default"> {
   let TSFlags{0} = 1;
+  let TSFlags{2} = 1;
 }
 } // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
 
-// Placemarkers to indicate the start of a block or loop scope. These
+// Placemarkers to indicate the start or end of a block or loop scope. These
 // use/clobber EXPR_STACK to prevent them from being moved into the middle of
 // an expression tree.
 let Uses = [EXPR_STACK], Defs = [EXPR_STACK] in {
-def BLOCK     : I<(outs), (ins bb_op:$dst), [], "block   \t$dst">;
-def LOOP      : I<(outs), (ins bb_op:$dst), [], "loop    \t$dst">;
+def BLOCK     : I<(outs), (ins), [], "block">;
+def LOOP      : I<(outs), (ins), [], "loop">;
+def END_BLOCK : I<(outs), (ins), [], "end_block">;
+def END_LOOP  : I<(outs), (ins), [], "end_loop">;
 } // Uses = [EXPR_STACK], Defs = [EXPR_STACK]
 
-// No-op to indicate to the AsmPrinter that a loop ends here, so a
-// basic block label is needed even if it wouldn't otherwise appear so.
-let isTerminator = 1, hasCtrlDep = 1 in
-def LOOP_END : I<(outs), (ins), []>;
-
 multiclass RETURN<WebAssemblyRegClass vt> {
   def RETURN_#vt : I<(outs), (ins vt:$val), [(WebAssemblyreturn vt:$val)],
                      "return  \t$val">;