fix PR7465, mishandling of lcall and ljmp: intersegment long

call and jumps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111496 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 28 insertions, 12 deletions

diff --git a/lib/Target/X86/X86InstrFormats.td b/lib/Target/X86/X86InstrFormats.td
index f5da482..11c4e74 100644
--- a/lib/Target/X86/X86InstrFormats.td
+++ b/lib/Target/X86/X86InstrFormats.td
@@ -39,6 +39,7 @@ def MRM_E8 : Format<39>;
 def MRM_F0 : Format<40>;
 def MRM_F8 : Format<41>;
 def MRM_F9 : Format<42>;
+def RawFrmImm16 : Format<43>;
 
 // ImmType - This specifies the immediate type used by an instruction. This is
 // part of the ad-hoc solution used to emit machine instruction encodings by our
diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h
index 8c68bc6..c837a85 100644
--- a/lib/Target/X86/X86InstrInfo.h
+++ b/lib/Target/X86/X86InstrInfo.h
@@ -311,6 +311,12 @@ namespace X86II {
     MRM_F0 = 40,
     MRM_F8 = 41,
     MRM_F9 = 42,
+    
+    /// RawFrmImm16 - This is used for CALL FAR instructions, which have two
+    /// immediates, the first of which is a 16 or 32-bit immediate (specified by
+    /// the imm encoding) and the second is a 16-bit fixed value.  In the AMD
+    /// manual, this operand is described as pntr16:32 and pntr16:16
+    RawFrmImm16 = 43,
 
     FormMask       = 63,
 
@@ -522,6 +528,7 @@ namespace X86II {
     case X86II::AddRegFrm:
     case X86II::MRMDestReg:
     case X86II::MRMSrcReg:
+    case X86II::RawFrmImm16:
        return -1;
     case X86II::MRMDestMem:
       return 0;
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index e70840a..73788a1 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -675,12 +675,12 @@ let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1 in {
   def JMP32m     : I<0xFF, MRM4m, (outs), (ins i32mem:$dst), "jmp{l}\t{*}$dst",
                      [(brind (loadi32 addr:$dst))]>, Requires<[In32BitMode]>;
                      
-  def FARJMP16i  : Iseg16<0xEA, RawFrm, (outs), 
-                          (ins i16imm:$seg, i16imm:$off),
-                          "ljmp{w}\t$seg, $off", []>, OpSize;
-  def FARJMP32i  : Iseg32<0xEA, RawFrm, (outs),
-                          (ins i16imm:$seg, i32imm:$off),
-                          "ljmp{l}\t$seg, $off", []>;                     
+  def FARJMP16i  : Iseg16<0xEA, RawFrmImm16, (outs), 
+                          (ins i16imm:$off, i16imm:$seg),
+                          "ljmp{w}\t{$seg, $off|$off, $seg}", []>, OpSize;
+  def FARJMP32i  : Iseg32<0xEA, RawFrmImm16, (outs),
+                          (ins i32imm:$off, i16imm:$seg),
+                          "ljmp{l}\t{$seg, $off|$off, $seg}", []>;                     
 
   def FARJMP16m  : I<0xFF, MRM5m, (outs), (ins opaque32mem:$dst), 
                      "ljmp{w}\t{*}$dst", []>, OpSize;
@@ -716,12 +716,12 @@ let isCall = 1 in
     def CALL32m     : I<0xFF, MRM2m, (outs), (ins i32mem:$dst, variable_ops),
                         "call\t{*}$dst", [(X86call (loadi32 addr:$dst))]>;
   
-    def FARCALL16i  : Iseg16<0x9A, RawFrm, (outs), 
-                             (ins i16imm:$seg, i16imm:$off),
-                             "lcall{w}\t$seg, $off", []>, OpSize;
-    def FARCALL32i  : Iseg32<0x9A, RawFrm, (outs),
-                             (ins i16imm:$seg, i32imm:$off),
-                             "lcall{l}\t$seg, $off", []>;
+    def FARCALL16i  : Iseg16<0x9A, RawFrmImm16, (outs), 
+                             (ins i16imm:$off, i16imm:$seg),
+                             "lcall{w}\t{$seg, $off|$off, $seg}", []>, OpSize;
+    def FARCALL32i  : Iseg32<0x9A, RawFrmImm16, (outs),
+                             (ins i32imm:$off, i16imm:$seg),
+                             "lcall{l}\t{$seg, $off|$off, $seg}", []>;
                              
     def FARCALL16m  : I<0xFF, MRM3m, (outs), (ins opaque32mem:$dst),
                         "lcall{w}\t{*}$dst", []>, OpSize;
diff --git a/lib/Target/X86/X86MCCodeEmitter.cpp b/lib/Target/X86/X86MCCodeEmitter.cpp
index b39fce1..6065483 100644
--- a/lib/Target/X86/X86MCCodeEmitter.cpp
+++ b/lib/Target/X86/X86MCCodeEmitter.cpp
@@ -827,6 +827,14 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
   case X86II::RawFrm:
     EmitByte(BaseOpcode, CurByte, OS);
     break;
+      
+  case X86II::RawFrmImm16:
+    EmitByte(BaseOpcode, CurByte, OS);
+    EmitImmediate(MI.getOperand(CurOp++),
+                  X86II::getSizeOfImm(TSFlags), getImmFixupKind(TSFlags),
+                  CurByte, OS, Fixups);
+    EmitImmediate(MI.getOperand(CurOp++), 2, FK_Data_2, CurByte, OS, Fixups);
+    break;
 
   case X86II::AddRegFrm:
     EmitByte(BaseOpcode + GetX86RegNum(MI.getOperand(CurOp++)), CurByte, OS);