[llvm] [NVPTX] Emit prmt selection value in hex (PR #115049)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-devrel-x86-64` running on `ml-opt-devrel-x86-64-b2` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/175/builds/8053

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/NVPTX/load-store.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /b/ml-opt-devrel-x86-64-b1/build/bin/llc < /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll -march=nvptx64 -mcpu=sm_20 | /b/ml-opt-devrel-x86-64-b1/build/bin/FileCheck -check-prefixes=CHECK,SM60 /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll
+ /b/ml-opt-devrel-x86-64-b1/build/bin/FileCheck -check-prefixes=CHECK,SM60 /b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll
+ /b/ml-opt-devrel-x86-64-b1/build/bin/llc -march=nvptx64 -mcpu=sm_20
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll:178:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: prmt.b32 %r6, %r5, %r3, 13120;
              ^
<stdin>:141:24: note: scanning from here
 cvt.u32.u16 %r5, %rs4;
                       ^
<stdin>:142:2: note: possible intended match here
 prmt.b32 %r6, %r5, %r3, 0x3340U;
 ^
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll:522:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: prmt.b32 %r6, %r5, %r3, 13120;
              ^
<stdin>:432:24: note: scanning from here
 cvt.u32.u16 %r5, %rs4;
                       ^
<stdin>:433:2: note: possible intended match here
 prmt.b32 %r6, %r5, %r3, 0x3340U;
 ^
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll:1427:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: prmt.b32 %r6, %r5, %r3, 13120;
              ^
<stdin>:1103:24: note: scanning from here
 cvt.u32.u16 %r5, %rs4;
                       ^
<stdin>:1104:2: note: possible intended match here
 prmt.b32 %r6, %r5, %r3, 0x3340U;
 ^
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll:1752:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: prmt.b32 %r6, %r5, %r3, 13120;
              ^
<stdin>:1394:24: note: scanning from here
 cvt.u32.u16 %r5, %rs4;
                       ^
<stdin>:1395:2: note: possible intended match here
 prmt.b32 %r6, %r5, %r3, 0x3340U;
 ^
/b/ml-opt-devrel-x86-64-b1/llvm-project/llvm/test/CodeGen/NVPTX/load-store.ll:2799:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: prmt.b32 %r6, %r5, %r3, 13120;
              ^
<stdin>:2065:24: note: scanning from here
 cvt.u32.u16 %r5, %rs4;
                       ^
...

```

</details>

https://github.com/llvm/llvm-project/pull/115049