[llvm] [RISCV] Fix duplicate test cases for G_UNMERGE_VALUES (PR #94622)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-globalisel

Author: Gábor Spaits (spaits)

<details>
<summary>Changes</summary>

`unmerge_i64` and `unmerge_i32` were exactly the same test cases. This PR would fix that, so  `unmerge_i32` would actually unmerge a 32 bit value into two 16 bit values.

---
Full diff: https://github.com/llvm/llvm-project/pull/94622.diff


1 Files Affected:

- (modified) llvm/test/CodeGen/RISCV/GlobalISel/legalizer/merge-unmerge-rv32.mir (+6-4) 


``````````diff
diff --git a/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/merge-unmerge-rv32.mir b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/merge-unmerge-rv32.mir
index 2e4a39c468111..46a7df4495582 100644
--- a/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/merge-unmerge-rv32.mir
+++ b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/merge-unmerge-rv32.mir
@@ -68,12 +68,14 @@ body:             |
     ; RV32: liveins: $x10
     ; RV32-NEXT: {{  $}}
     ; RV32-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $x10
-    ; RV32-NEXT: $x10 = COPY [[COPY]](s32)
+    ; RV32-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; RV32-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY]], [[C]]
+    ; RV32-NEXT: $x10 = COPY [[AND]](s32)
     ; RV32-NEXT: PseudoRET implicit $x10
     %0:_(s32) = COPY $x10
-    %1:_(s64) = G_ZEXT %0(s32)
-    %2:_(s32), %3:_(s32) = G_UNMERGE_VALUES %1(s64)
-    $x10 = COPY %2(s32)
+    %2:_(s16), %3:_(s16) = G_UNMERGE_VALUES %0(s32)
+    %4:_(s32) = G_ZEXT %2(s16)
+    $x10 = COPY %4(s32)
     PseudoRET implicit $x10
 ...
 ---

``````````

</details>


https://github.com/llvm/llvm-project/pull/94622