From 018b54e5c3d31dc03e2a874d58ae258651087296 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 5 Apr 2010 18:44:00 +0000
Subject: [PATCH] fix PR6780, properly handling the IR {|} escapes in inline
 asm strings.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100449 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/Stmt.cpp   | 14 +++++++++-----
 test/CodeGen/asm.c | 12 ++++++++++++
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/lib/AST/Stmt.cpp b/lib/AST/Stmt.cpp
index 8347249a46..97023820e2 100644
--- a/lib/AST/Stmt.cpp
+++ b/lib/AST/Stmt.cpp
@@ -249,14 +249,18 @@ unsigned AsmStmt::AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece>&Pieces,
     }
 
     char CurChar = *CurPtr++;
-    if (CurChar == '$') {
-      CurStringPiece += "$$";
-      continue;
-    } else if (CurChar != '%') {
+    switch (CurChar) {
+    case '$': CurStringPiece += "$$"; continue;
+    case '{': CurStringPiece += "$("; continue;
+    case '|': CurStringPiece += "$|"; continue;
+    case '}': CurStringPiece += "$)"; continue;
+    case '%':
+      break;
+    default:
       CurStringPiece += CurChar;
       continue;
     }
-
+    
     // Escaped "%" character in asm string.
     if (CurPtr == StrEnd) {
       // % at end of string is invalid (no escape).
diff --git a/test/CodeGen/asm.c b/test/CodeGen/asm.c
index bf1c806a2c..ace0db9af6 100644
--- a/test/CodeGen/asm.c
+++ b/test/CodeGen/asm.c
@@ -135,3 +135,15 @@ int t18(unsigned data) {
 // CHECK-NEXT: extractvalue
 // CHECK-NEXT: extractvalue
 }
+
+
+// PR6780
+int t19(unsigned data) {
+  int a, b;
+  
+  asm("x{abc|def|ghi}z" :"=r"(a): "r"(data));
+  return a + b;
+  // CHECK: t19(i32
+  // CHECK: = call {{.*}}asm "x$(abc$|def$|ghi$)z"
+}
+
-- 
2.40.0