[LLVM][inline-asm] Altmacro string escape character '!'
This patch is the fourth patch in a series of reviews for the Altmacro feature.
This patch introduces a new escape character '!' and it depends on D32701.
according to https://sourceware.org/binutils/docs/as/Altmacro.html:
"single-character string escape
To include any single character literally in a string (even if the character would otherwise have some special meaning), you can prefix the character with !' (an exclamation mark). For example, you can write <4.3 !> 5.4!!>' to get the literal text `4.3 > 5.4!'. "
Differential Revision: https://reviews.llvm.org/D32792
llvm-svn: 302652
diff --git a/llvm/test/MC/AsmParser/altmacro_string_escape.s b/llvm/test/MC/AsmParser/altmacro_string_escape.s
new file mode 100644
index 0000000..bcc9e84
--- /dev/null
+++ b/llvm/test/MC/AsmParser/altmacro_string_escape.s
@@ -0,0 +1,29 @@
+# RUN: llvm-mc -triple i386-linux-gnu %s| FileCheck %s
+
+.altmacro
+# single-character string escape
+# To include any single character literally in a string
+# (even if the character would otherwise have some special meaning),
+# you can prefix the character with `!'.
+# For example, you can write `<4.3 !> 5.4!!>' to get the literal text `4.3 > 5.4!'.
+
+# CHECK: workForFun:
+.macro fun1 number
+ .if \number=5
+ lableNotWork:
+ .else
+ workForFun:
+ .endif
+.endm
+
+# CHECK: workForFun2:
+.macro fun2 string
+ .if \string
+ workForFun2:
+ .else
+ notworkForFun2:
+ .endif
+.endm
+
+fun1 <5!!>
+fun2 <5!>4>