Handle 'a' modifier in X86 asms. PR 4742.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79484 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/2009-08-19-inline-asm-a-modifier.ll b/test/CodeGen/X86/2009-08-19-inline-asm-a-modifier.ll
new file mode 100644
index 0000000..b2584a2
--- /dev/null
+++ b/test/CodeGen/X86/2009-08-19-inline-asm-a-modifier.ll
@@ -0,0 +1,18 @@
+; RUN: llvm-as < %s | llc | grep {%gs:6}
+; RUN: llvm-as < %s | llc | grep {%gs:\\\(%*\\\)}
+; ModuleID = 'asm.c'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin9.6"
+
+define i32 @main() nounwind {
+entry:
+ %asmtmp.i = tail call i16 asm "movw\09%gs:${1:a}, ${0:w}", "=r,ir,~{dirflag},~{fpsr},~{flags}"(i32 6) nounwind ; <i16> [#uses=1]
+ %0 = zext i16 %asmtmp.i to i32 ; <i32> [#uses=1]
+ ret i32 %0
+}
+
+define zeroext i16 @readgsword2(i32 %address) nounwind {
+entry:
+ %asmtmp = tail call i16 asm "movw\09%gs:${1:a}, ${0:w}", "=r,ir,~{dirflag},~{fpsr},~{flags}"(i32 %address) nounwind ; <i16> [#uses=1]
+ ret i16 %asmtmp
+}