From 76f0ff394de5656b9e6e6a4016a2a5f3fbece7ad Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 12 Mar 2004 05:51:36 +0000
Subject: [PATCH] Allow parsing select instruction and constant expr

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12313 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AsmParser/Lexer.l         |  1 +
 lib/AsmParser/llvmAsmParser.y | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/lib/AsmParser/Lexer.l b/lib/AsmParser/Lexer.l
index 999a5762998..c2db5a26348 100644
--- a/lib/AsmParser/Lexer.l
+++ b/lib/AsmParser/Lexer.l
@@ -234,6 +234,7 @@ setge           { RET_TOK(BinaryOpVal, SetGE, SETGE); }
 phi             { RET_TOK(OtherOpVal, PHI, PHI_TOK); }
 call            { RET_TOK(OtherOpVal, Call, CALL); }
 cast            { RET_TOK(OtherOpVal, Cast, CAST); }
+select          { RET_TOK(OtherOpVal, Select, SELECT); }
 shl             { RET_TOK(OtherOpVal, Shl, SHL); }
 shr             { RET_TOK(OtherOpVal, Shr, SHR); }
 va_arg          { return VA_ARG; /* FIXME: OBSOLETE */}
diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index 9c68cfca5d2..2868fdd1b34 100644
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -876,7 +876,7 @@ using namespace llvm;
 
 // Other Operators
 %type  <OtherOpVal> ShiftOps
-%token <OtherOpVal> PHI_TOK CALL CAST SHL SHR VAARG VANEXT
+%token <OtherOpVal> PHI_TOK CALL CAST SELECT SHL SHR VAARG VANEXT
 %token VA_ARG // FIXME: OBSOLETE
 
 %start Module
@@ -1251,6 +1251,13 @@ ConstExpr: CAST '(' ConstVal TO Types ')' {
 
     $$ = ConstantExpr::getGetElementPtr($3, IdxVec);
   }
+  | SELECT '(' ConstVal ',' ConstVal ',' ConstVal ')' {
+    if ($3->getType() != Type::BoolTy)
+      ThrowException("Select condition must be of boolean type!");
+    if ($5->getType() != $7->getType())
+      ThrowException("Select operand types must match!");
+    $$ = ConstantExpr::getSelect($3, $5, $7);
+  }
   | BinaryOps '(' ConstVal ',' ConstVal ')' {
     if ($3->getType() != $5->getType())
       ThrowException("Binary operator types must match!");
@@ -1802,6 +1809,13 @@ InstVal : ArithmeticOps Types ValueRef ',' ValueRef {
     $$ = new CastInst($2, *$4);
     delete $4;
   }
+  | SELECT ResolvedVal ',' ResolvedVal ',' ResolvedVal {
+    if ($2->getType() != Type::BoolTy)
+      ThrowException("select condition must be boolean!");
+    if ($4->getType() != $6->getType())
+      ThrowException("select value types should match!");
+    $$ = new SelectInst($2, $4, $6);
+  }
   | VA_ARG ResolvedVal ',' Types {
     // FIXME: This is emulation code for an obsolete syntax.  This should be
     // removed at some point.