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-rw-r--r--lib/Target/WebAssembly/WebAssemblyInstrControl.td93
1 files changed, 47 insertions, 46 deletions
diff --git a/lib/Target/WebAssembly/WebAssemblyInstrControl.td b/lib/Target/WebAssembly/WebAssemblyInstrControl.td
index 7eb6cbf4d249..1870c5bc34b0 100644
--- a/lib/Target/WebAssembly/WebAssemblyInstrControl.td
+++ b/lib/Target/WebAssembly/WebAssemblyInstrControl.td
@@ -1,9 +1,8 @@
//===- WebAssemblyInstrControl.td-WebAssembly control-flow ------*- tablegen -*-
//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
@@ -21,11 +20,10 @@ defm BR_IF : I<(outs), (ins bb_op:$dst, I32:$cond),
let isCodeGenOnly = 1 in
defm BR_UNLESS : I<(outs), (ins bb_op:$dst, I32:$cond),
(outs), (ins bb_op:$dst), []>;
-let isBarrier = 1 in {
+let isBarrier = 1 in
defm BR : NRI<(outs), (ins bb_op:$dst),
[(br bb:$dst)],
"br \t$dst", 0x0c>;
-} // isBarrier = 1
} // isBranch = 1, isTerminator = 1, hasCtrlDep = 1
def : Pat<(brcond (i32 (setne I32:$cond, 0)), bb:$dst),
@@ -36,14 +34,11 @@ def : Pat<(brcond (i32 (seteq I32:$cond, 0)), bb:$dst),
// A list of branch targets enclosed in {} and separated by comma.
// Used by br_table only.
def BrListAsmOperand : AsmOperandClass { let Name = "BrList"; }
-let OperandNamespace = "WebAssembly" in {
-let OperandType = "OPERAND_BRLIST" in {
+let OperandNamespace = "WebAssembly", OperandType = "OPERAND_BRLIST" in
def brlist : Operand<i32> {
let ParserMatchClass = BrListAsmOperand;
let PrintMethod = "printBrList";
}
-} // OPERAND_BRLIST
-} // OperandNamespace = "WebAssembly"
// TODO: SelectionDAG's lowering insists on using a pointer as the index for
// jump tables, so in practice we don't ever use BR_TABLE_I64 in wasm32 mode
@@ -82,6 +77,9 @@ defm ELSE : NRI<(outs), (ins), [], "else", 0x05>;
defm END_BLOCK : NRI<(outs), (ins), [], "end_block", 0x0b>;
defm END_LOOP : NRI<(outs), (ins), [], "end_loop", 0x0b>;
defm END_IF : NRI<(outs), (ins), [], "end_if", 0x0b>;
+// Generic instruction, for disassembler.
+let IsCanonical = 1 in
+defm END : NRI<(outs), (ins), [], "end", 0x0b>;
let isTerminator = 1, isBarrier = 1 in
defm END_FUNCTION : NRI<(outs), (ins), [], "end_function", 0x0b>;
} // Uses = [VALUE_STACK], Defs = [VALUE_STACK]
@@ -106,7 +104,7 @@ multiclass SIMD_RETURN<ValueType vt> {
let isCodeGenOnly = 1 in
defm FALLTHROUGH_RETURN_#vt : I<(outs), (ins V128:$val), (outs), (ins),
[]>,
- Requires<[HasSIMD128]>;
+ Requires<[HasSIMD128]>;
}
let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
@@ -116,7 +114,7 @@ let isReturn = 1 in {
defm "": RETURN<I64>;
defm "": RETURN<F32>;
defm "": RETURN<F64>;
- defm "": RETURN<EXCEPT_REF>;
+ defm "": RETURN<EXNREF>;
defm "": SIMD_RETURN<v16i8>;
defm "": SIMD_RETURN<v8i16>;
defm "": SIMD_RETURN<v4i32>;
@@ -142,23 +140,17 @@ let Predicates = [HasExceptionHandling] in {
// Throwing an exception: throw / rethrow
let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in {
-defm THROW_I32 : I<(outs), (ins event_op:$tag, I32:$val),
- (outs), (ins event_op:$tag),
- [(WebAssemblythrow (WebAssemblywrapper texternalsym:$tag),
- I32:$val)],
- "throw \t$tag, $val", "throw \t$tag",
- 0x08>;
-defm THROW_I64 : I<(outs), (ins event_op:$tag, I64:$val),
- (outs), (ins event_op:$tag),
- [(WebAssemblythrow (WebAssemblywrapper texternalsym:$tag),
- I64:$val)],
- "throw \t$tag, $val", "throw \t$tag",
- 0x08>;
-defm RETHROW : NRI<(outs), (ins bb_op:$dst), [], "rethrow \t$dst", 0x09>;
-let isCodeGenOnly = 1 in
-// This is used when the destination for rethrow is the caller function. This
-// will be converted to a rethrow in CFGStackify.
-defm RETHROW_TO_CALLER : NRI<(outs), (ins), [], "rethrow">;
+defm THROW : I<(outs), (ins event_op:$tag, variable_ops),
+ (outs), (ins event_op:$tag),
+ [(WebAssemblythrow (WebAssemblywrapper texternalsym:$tag))],
+ "throw \t$tag", "throw \t$tag", 0x08>;
+defm RETHROW : I<(outs), (ins EXNREF:$exn), (outs), (ins), [],
+ "rethrow \t$exn", "rethrow", 0x09>;
+// Pseudo instruction to be the lowering target of int_wasm_rethrow_in_catch
+// intrinsic. Will be converted to the real rethrow instruction later.
+let isPseudo = 1 in
+defm RETHROW_IN_CATCH : NRI<(outs), (ins), [(int_wasm_rethrow_in_catch)],
+ "rethrow_in_catch", 0>;
} // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1
// Region within which an exception is caught: try / end_try
@@ -167,24 +159,33 @@ defm TRY : NRI<(outs), (ins Signature:$sig), [], "try \t$sig", 0x06>;
defm END_TRY : NRI<(outs), (ins), [], "end_try", 0x0b>;
} // Uses = [VALUE_STACK], Defs = [VALUE_STACK]
-// Catching an exception: catch / catch_all
-let hasCtrlDep = 1, hasSideEffects = 1 in {
-defm CATCH_I32 : I<(outs I32:$dst), (ins i32imm:$tag),
- (outs), (ins i32imm:$tag),
- [(set I32:$dst, (int_wasm_catch imm:$tag))],
- "i32.catch \t$dst, $tag", "i32.catch \t$tag", 0x07>;
-defm CATCH_I64 : I<(outs I64:$dst), (ins i32imm:$tag),
- (outs), (ins i32imm:$tag),
- [(set I64:$dst, (int_wasm_catch imm:$tag))],
- "i64.catch \t$dst, $tag", "i64.catch \t$tag", 0x07>;
-defm CATCH_ALL : NRI<(outs), (ins), [], "catch_all", 0x05>;
-}
+// Catching an exception: catch / extract_exception
+let hasCtrlDep = 1, hasSideEffects = 1 in
+defm CATCH : I<(outs EXNREF:$dst), (ins), (outs), (ins), [],
+ "catch \t$dst", "catch", 0x07>;
+
+// Querying / extracing exception: br_on_exn
+// br_on_exn queries an exnref to see if it matches the corresponding exception
+// tag index. If true it branches to the given label and pushes the
+// corresponding argument values of the exception onto the stack.
+let isBranch = 1, isTerminator = 1, hasCtrlDep = 1 in
+defm BR_ON_EXN : I<(outs), (ins bb_op:$dst, event_op:$tag, EXNREF:$exn),
+ (outs), (ins bb_op:$dst, event_op:$tag), [],
+ "br_on_exn \t$dst, $tag, $exn", "br_on_exn \t$dst, $tag",
+ 0x0a>;
+// This is a pseudo instruction that simulates popping a value from stack, which
+// has been pushed by br_on_exn
+let isCodeGenOnly = 1, hasSideEffects = 1 in
+defm EXTRACT_EXCEPTION_I32 : NRI<(outs I32:$dst), (ins),
+ [(set I32:$dst, (int_wasm_extract_exception))],
+ "extract_exception\t$dst">;
// Pseudo instructions: cleanupret / catchret
let isTerminator = 1, hasSideEffects = 1, isBarrier = 1, hasCtrlDep = 1,
- isCodeGenOnly = 1, isEHScopeReturn = 1 in {
- defm CLEANUPRET : NRI<(outs), (ins), [(cleanupret)], "", 0>;
+ isPseudo = 1, isEHScopeReturn = 1 in {
+ defm CLEANUPRET : NRI<(outs), (ins), [(cleanupret)], "cleanupret", 0>;
defm CATCHRET : NRI<(outs), (ins bb_op:$dst, bb_op:$from),
- [(catchret bb:$dst, bb:$from)], "", 0>;
-}
-}
+ [(catchret bb:$dst, bb:$from)], "catchret", 0>;
+} // isTerminator = 1, hasSideEffects = 1, isBarrier = 1, hasCtrlDep = 1,
+ // isPseudo = 1, isEHScopeReturn = 1
+} // Predicates = [HasExceptionHandling]
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-07 12:54:58 +0000