[mips] Support 'y' operand code to print exact log2 of the operand

llvm-svn: 324477

2 files changed, 22 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/Mips/inlineasm-opcode-bad-y.ll b/llvm/test/CodeGen/Mips/inlineasm-opcode-bad-y.ll
new file mode 100644
index 00000000000..e94b608d047
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/inlineasm-opcode-bad-y.ll
@@ -0,0 +1,11 @@
+; Negative test for the 'm' operand code. This operand code is applicable
+; for an immediate whic is exact power of 2.
+
+; RUN: not llc -march=mips < %s 2>&1 | FileCheck %s
+
+define i32 @foo() nounwind {
+entry:
+; CHECK: error: invalid operand in inline asm: 'addiu $0, $1, ${2:y}'
+  tail call i32 asm sideeffect "addiu $0, $1, ${2:y}", "=r,r,I"(i32 7, i32 3) ;
+  ret i32 0
+}
diff --git a/llvm/test/CodeGen/Mips/inlineasm-operand-code.ll b/llvm/test/CodeGen/Mips/inlineasm-operand-code.ll
index 6b46884e9af..0b8e831150e 100644
--- a/llvm/test/CodeGen/Mips/inlineasm-operand-code.ll
+++ b/llvm/test/CodeGen/Mips/inlineasm-operand-code.ll
@@ -63,6 +63,17 @@ entry:
   ret i32 0
 }
 
+; y with 4
+define i32 @constraint_y_4() nounwind {
+entry:
+; ALL-LABEL: constraint_y_4:
+; ALL:   #APP
+; ALL:   addiu ${{[0-9]+}}, ${{[0-9]+}}, 2
+; ALL:   #NO_APP
+  tail call i32 asm sideeffect "addiu $0, $1, ${2:y}", "=r,r,I"(i32 7, i32 4) ;
+  ret i32 0
+}
+
 ; z with -3
 define void @constraint_z_0() nounwind {
 entry: