aboutsummaryrefslogtreecommitdiffstats
path: root/utils
diff options
context:
space:
mode:
authorJim Grosbach <grosbach@apple.com>2013-02-06 06:00:06 +0000
committerJim Grosbach <grosbach@apple.com>2013-02-06 06:00:06 +0000
commitfa05def52c6bb8266d856a9af2de6fa066d93d44 (patch)
tree70e16da8174d68bec9e30ac1ad4192650f22bd48 /utils
parentb2ac7c09b17efadea2a9f90f45801d9d2ee687aa (diff)
downloadexternal_llvm-fa05def52c6bb8266d856a9af2de6fa066d93d44.zip
external_llvm-fa05def52c6bb8266d856a9af2de6fa066d93d44.tar.gz
external_llvm-fa05def52c6bb8266d856a9af2de6fa066d93d44.tar.bz2
Allow targets to add custom asm operand matching logic.
For example, ARM has several instructions with a literal '#0' immediate in the syntax that's not represented as an actual operand. The asm matcher is expected a token operand, but the parser will have created an immediate operand. This is currently handled by dedicated per-instruction C++ munging of the ParsedAsmOperand list, but will be better handled by this hook. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174487 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils')
-rw-r--r--utils/TableGen/AsmMatcherEmitter.cpp9
1 files changed, 9 insertions, 0 deletions
diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
index 6d62d6b..6faf819 100644
--- a/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -2878,6 +2878,15 @@ void AsmMatcherEmitter::run(raw_ostream &OS) {
OS << "(MatchClassKind)it->Classes[i]);\n";
OS << " if (Diag == Match_Success)\n";
OS << " continue;\n";
+ OS << " // If the generic handler indicates an invalid operand\n";
+ OS << " // failure, check for a special case.\n";
+ OS << " if (Diag == Match_InvalidOperand) {\n";
+ OS << " Diag = validateTargetOperandClass(Operands[i+1],\n";
+ OS.indent(43);
+ OS << "(MatchClassKind)it->Classes[i]);\n";
+ OS << " if (Diag == Match_Success)\n";
+ OS << " continue;\n";
+ OS << " }\n";
OS << " // If this operand is broken for all of the instances of this\n";
OS << " // mnemonic, keep track of it so we can report loc info.\n";
OS << " // If we already had a match that only failed due to a\n";