[AsmParser] Recognize more escaped characters between single quotes

The GNU AS manual states the following about single-character constants enclosed within single quotes:

>  Some backslash escapes apply to characters, \b, \f, \n, \r, \t, and \" with the same meaning as for strings, plus \' for a single quote.

Add two more characters to the switch handling this case to match GAS behaviour, plus a test to make sure nothing regresses.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D99609

diff --git a/llvm/lib/MC/MCParser/AsmLexer.cpp b/llvm/lib/MC/MCParser/AsmLexer.cpp
index 62631ce..f8e8eea 100644 (file)
--- a/llvm/lib/MC/MCParser/AsmLexer.cpp
+++ b/llvm/lib/MC/MCParser/AsmLexer.cpp
@@ -597,6 +597,8 @@ AsmToken AsmLexer::LexSingleQuote() {
       case 't': Value = '\t'; break;
       case 'n': Value = '\n'; break;
       case 'b': Value = '\b'; break;
+      case 'f': Value = '\f'; break;
+      case 'r': Value = '\r'; break;
     }
   } else
     Value = TokStart[1];

diff --git a/llvm/test/MC/AsmParser/directive_values.s b/llvm/test/MC/AsmParser/directive_values.s
index 6941a1a..125f348 100644 (file)
--- a/llvm/test/MC/AsmParser/directive_values.s
+++ b/llvm/test/MC/AsmParser/directive_values.s
@@ -1,22 +1,22 @@
 # RUN: llvm-mc -triple i386-unknown-unknown %s | FileCheck %s
 
 # CHECK: TEST0:
-# CHECK: .byte 0
+# CHECK-NEXT: .byte 0
 TEST0:  
         .byte 0
 
 # CHECK: TEST1:
-# CHECK: .short 3
+# CHECK-NEXT: .short 3
 TEST1:  
         .short 3
 
 # CHECK: TEST2:
-# CHECK: .long 8
+# CHECK-NEXT: .long 8
 TEST2:  
         .long 8
 
 # CHECK: TEST3:
-# CHECK: .quad 9
+# CHECK-NEXT: .quad 9
 TEST3:  
         .quad 9
 
@@ -29,17 +29,17 @@ TEST4:
         .quad 4294967295LL+1
         .quad 0b10LL + 07ULL + 0x42AULL
 # CHECK: TEST4
-# CHECK:       .quad   4
-# CHECK: .quad 4294967295
-# CHECK:       .quad   4294967296
-# CHECK:       .quad   4294967296
-# CHECK:       .quad   1075
+# CHECK-NEXT:  .quad   4
+# CHECK-NEXT:  .quad   4294967295
+# CHECK-NEXT:  .quad   4294967296
+# CHECK-NEXT:  .quad   4294967296
+# CHECK-NEXT:  .quad   1075
 
 
 TEST5:
         .value 8
 # CHECK: TEST5:
-# CHECK: .short 8
+# CHECK-NEXT: .short 8
 
 TEST6:
         .byte 'c'
@@ -48,18 +48,25 @@ TEST6:
         .byte '\#'
         .byte '\t'
         .byte '\n'
+        .byte '\r'
+        .byte '\f'
+        .byte '\"'
 
 # CHECK: TEST6
-# CHECK:        .byte   99
-# CHECK:        .byte   39
-# CHECK:        .byte   92
-# CHECK:        .byte   35
-# CHECK:        .byte   9
-# CHECK:        .byte   10
+# CHECK-NEXT:   .byte   99
+# CHECK-NEXT:   .byte   39
+# CHECK-NEXT:   .byte   92
+# CHECK-NEXT:   .byte   35
+# CHECK-NEXT:   .byte   9
+# CHECK-NEXT:   .byte   10
+# CHECK-NEXT:   .byte   13
+# CHECK-NEXT:   .byte   12
+# CHECK-NEXT:   .byte   34
 
 TEST7:
         .byte 1, 2, 3, 4
-# CHECK:        .byte   1
+# CHECK: TEST7
+# CHECK-NEXT:   .byte   1
 # CHECK-NEXT:   .byte   2
 # CHECK-NEXT:   .byte   3
 # CHECK-NEXT:   .byte   4
@@ -67,17 +74,18 @@ TEST7:
 TEST8:
         .long 0x200000UL+1
         .long 0x200000L+1
-# CHECK: .long 2097153
-# CHECK: .long 2097153
+# CHECK: TEST8
+# CHECK-NEXT: .long 2097153
+# CHECK-NEXT: .long 2097153
 
 TEST9:
        .octa 0x1234567812345678abcdef, 340282366920938463463374607431768211455
        .octa 0b00111010010110100101101001011010010110100101101001011010010110100101101001011010010110100101101001011010010110100101101001011010
 # CHECK: TEST9
-# CHECK: .quad 8652035380128501231
-# CHECK: .quad 1193046
-# CHECK: .quad -1
-# CHECK: .quad -1
-# CHECK: .quad 6510615555426900570
-# CHECK: .quad 4204772546213206618
+# CHECK-NEXT: .quad 8652035380128501231
+# CHECK-NEXT: .quad 1193046
+# CHECK-NEXT: .quad -1
+# CHECK-NEXT: .quad -1
+# CHECK-NEXT: .quad 6510615555426900570
+# CHECK-NEXT: .quad 4204772546213206618