Rename tests

Author: wangpc-pp

llvm/test/CodeGen/RISCV/macro-fusions.mir

@@ -38,10 +38,10 @@ body:             |
     PseudoRET
 ...
 
-# CHECK: slli_srli
+# CHECK: slli_srli_shifted_zext
 # CHECK: Macro fuse: {{.*}}SLLI - SRLI
 ---
-name: slli_srli
+name: shifted_zext
 tracksRegLiveness: true
 body:             |
   bb.0.entry:
@@ -55,10 +55,10 @@ body:             |
     PseudoRET
 ...
 
-# CHECK: slli_srli_48
+# CHECK: slli_srli_zexth
 # CHECK: Macro fuse: {{.*}}SLLI - SRLI
 ---
-name: slli_srli_48
+name: zexth
 tracksRegLiveness: true
 body:             |
   bb.0.entry:
@@ -72,6 +72,23 @@ body:             |
     PseudoRET
 ...
 
+# CHECK: slli_srli_zextw
+# CHECK: Macro fuse: {{.*}}SLLI - SRLI
+---
+name: zextw
+tracksRegLiveness: true
+body:             |
+  bb.0.entry:
+    liveins: $x10
+    %1:gpr = COPY $x10
+    %2:gpr = SLLI %1, 32
+    %3:gpr = XORI %1, 3
+    %4:gpr = SRLI %2, 32
+    $x10 = COPY %3
+    $x11 = COPY %4
+    PseudoRET
+...
+
 # CHECK: slli_srli_no_fusion_0
 # CHECK-NOT: Macro fuse: {{.*}}SLLI - SRLI
 ---