From 7b0bc3fe3e8210ec7fffb311443a07d81cbe1308 Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@apple.com>
Date: Wed, 13 Feb 2013 21:33:44 +0000
Subject: [ms-inline-asm] Add support for memory references that have
 non-immediate displacements. rdar://12974533

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175083 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86AsmPrinter.cpp  | 31 ++++++++++++++++++-------------
 test/CodeGen/X86/ms-inline-asm.ll | 23 +++++++++++++++++++++++
 2 files changed, 41 insertions(+), 13 deletions(-)

diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index 75fa9d2074..ac5daec2b2 100644
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -252,14 +252,15 @@ void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
   }
 
   case MachineOperand::MO_Immediate:
-    O << '$' << MO.getImm();
+    if (AsmVariant == 0) O << '$';
+    O << MO.getImm();
     return;
 
   case MachineOperand::MO_JumpTableIndex:
   case MachineOperand::MO_ConstantPoolIndex:
   case MachineOperand::MO_GlobalAddress:
   case MachineOperand::MO_ExternalSymbol: {
-    O << '$';
+    if (AsmVariant == 0) O << '$';
     printSymbolOperand(MO, O);
     break;
   }
@@ -355,19 +356,23 @@ void X86AsmPrinter::printIntelMemReference(const MachineInstr *MI, unsigned Op,
     NeedPlus = true;
   }
 
-  assert (DispSpec.isImm() && "Displacement is not an immediate!");
-  int64_t DispVal = DispSpec.getImm();
-  if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg())) {
-    if (NeedPlus) {
-      if (DispVal > 0)
-        O << " + ";
-      else {
-        O << " - ";
-        DispVal = -DispVal;
+  if (!DispSpec.isImm()) {
+    if (NeedPlus) O << " + ";
+    printOperand(MI, Op+3, O, Modifier, AsmVariant);
+  } else {
+    int64_t DispVal = DispSpec.getImm();
+    if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg())) {
+      if (NeedPlus) {
+        if (DispVal > 0)
+          O << " + ";
+        else {
+          O << " - ";
+          DispVal = -DispVal;
+        }
       }
+      O << DispVal;
     }
-    O << DispVal;
-  }  
+  }
   O << ']';
 }
 
diff --git a/test/CodeGen/X86/ms-inline-asm.ll b/test/CodeGen/X86/ms-inline-asm.ll
index 68e332eed4..c6eb63333a 100644
--- a/test/CodeGen/X86/ms-inline-asm.ll
+++ b/test/CodeGen/X86/ms-inline-asm.ll
@@ -79,3 +79,26 @@ entry:
 ; CHECK: .att_syntax
 ; CHECK: {{## InlineAsm End|#NO_APP}}
 }
+
+@results = global [2 x i32] [i32 3, i32 2], align 4
+
+define i32* @t30() nounwind ssp {
+entry:
+  %res = alloca i32*, align 4
+  call void asm sideeffect inteldialect "lea edi, dword ptr $0", "*m,~{edi},~{dirflag},~{fpsr},~{flags}"([2 x i32]* @results) nounwind
+  call void asm sideeffect inteldialect "mov dword ptr $0, edi", "=*m,~{dirflag},~{fpsr},~{flags}"(i32** %res) nounwind
+  %0 = load i32** %res, align 4
+  ret i32* %0
+; CHECK: t30:
+; CHECK: {{## InlineAsm Start|#APP}}
+; CHECK: .intel_syntax
+; CHECK: lea edi, dword ptr [_results]
+; CHECK: .att_syntax
+; CHECK: {{## InlineAsm End|#NO_APP}}
+; CHECK: {{## InlineAsm Start|#APP}}
+; CHECK: .intel_syntax
+; CHECK: mov dword ptr [esp], edi
+; CHECK: .att_syntax
+; CHECK: {{## InlineAsm End|#NO_APP}}
+; CHECK: movl (%esp), %eax
+}
-- 
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