The Mips specific inline asm operand modifier 'z' has the
following description in the gnu sources:
Print $0 if operand is zero otherwise print the op normally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159324 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/Mips/inlineasm-operand-code.ll b/test/CodeGen/Mips/inlineasm-operand-code.ll
index 2dcc10d..ca4f3e4 100644
--- a/test/CodeGen/Mips/inlineasm-operand-code.ll
+++ b/test/CodeGen/Mips/inlineasm-operand-code.ll
@@ -29,5 +29,17 @@
;CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:m}", "=r,r,I"(i32 7, i32 -3) nounwind
+; z with -3
+;CHECK: #APP
+;CHECK: addi ${{[0-9]+}},${{[0-9]+}},-3
+;CHECK: #NO_APP
+ tail call i32 asm sideeffect "addi $0,$1,${2:z}", "=r,r,I"(i32 7, i32 -3) nounwind
+
+; z with 0
+;CHECK: #APP
+;CHECK: addi ${{[0-9]+}},${{[0-9]+}},$0
+;CHECK: #NO_APP
+ tail call i32 asm sideeffect "addi $0,$1,${2:z}", "=r,r,I"(i32 7, i32 0) nounwind
+
ret i32 0
}