[llvm] [llvm][NVPTX] Don't reorder MIs that construct a PTX function call (PR #116522)

[Youngsuk Kim via llvm-commits]

================
@@ -0,0 +1,28 @@
+; RUN: llc -O3 -march=nvptx64 -enable-misched %s -o - | FileCheck %s
+
+target datalayout = "e-i64:64-i128:128-v16:16-v32:32-n16:32:64"
+target triple = "nvptx64-nvidia-cuda"
+
+define ptx_kernel void @my_kernel(i32 %arg_0, i32 %arg_3.tr, i32 %"$$i_l40_0_t23.0") {
+Entry_BB:
+  br label %BB1692
+
+BB1692:                                           ; preds = %BB1692, %Entry_BB
+  %"$$i_l40_0_t23.02" = phi i32 [ 0, %Entry_BB ], [ 1, %BB1692 ]
----------------
JOE1994 wrote:

Thanks for your feedback! I've pushed a commit that updates the test (used instnamer pass).

Running `update_llc_test_checks.py` generates too many unnecessary checks as below.
Is there a way to control or remove some unneeded checks?

```diff
--- a/llvm/test/CodeGen/NVPTX/misched_func_call.ll
+++ b/llvm/test/CodeGen/NVPTX/misched_func_call.ll
@@ -1,19 +1,50 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc -O3 -march=nvptx64 -enable-misched %s -o - | FileCheck %s

 target datalayout = "e-i64:64-i128:128-v16:16-v32:32-n16:32:64"
 target triple = "nvptx64-nvidia-cuda"

 define ptx_kernel void @wombat(i32 %arg, i32 %arg1, i32 %arg2) {
+; CHECK-LABEL: wombat(
+; CHECK:       {
+; CHECK-NEXT:    .reg .b32 %r<11>;
+; CHECK-NEXT:    .reg .b64 %rd<2>;
+; CHECK-NEXT:    .reg .f64 %fd<6>;
+; CHECK-EMPTY:
+; CHECK-NEXT:  // %bb.0: // %bb
+; CHECK-NEXT:    ld.param.u32 %r4, [wombat_param_2];
+; CHECK-NEXT:    ld.param.u32 %r3, [wombat_param_1];
+; CHECK-NEXT:    ld.param.u32 %r2, [wombat_param_0];
+; CHECK-NEXT:    mov.b32 %r10, 0;
+; CHECK-NEXT:    mov.u64 %rd1, 0;
+; CHECK-NEXT:    mov.b32 %r6, 1;
+; CHECK-NEXT:  $L__BB0_1: // %bb3
+; CHECK-NEXT:    // =>This Inner Loop Header: Depth=1
+; CHECK-NEXT:    { // callseq 0, 0
+; CHECK-NEXT:    .param .b64 param0;
+; CHECK-NEXT:    st.param.f64 [param0], 0d0000000000000000;
+; CHECK-NEXT:    .param .b64 retval0;
+; CHECK-NEXT:    call.uni (retval0),
+; CHECK-NEXT:    quux,
+; CHECK-NEXT:    (
+; CHECK-NEXT:    param0
+; CHECK-NEXT:    );
+; CHECK-NEXT:    mul.lo.s32 %r7, %r10, %r3;
+; CHECK-NEXT:    or.b32 %r8, %r4, %r7;
+; CHECK-NEXT:    mul.lo.s32 %r9, %r2, %r8;
+; CHECK-NEXT:    cvt.rn.f64.s32 %fd3, %r9;
+; CHECK-NEXT:    ld.param.f64 %fd1, [retval0];
+; CHECK-NEXT:    } // callseq 0
+; CHECK-NEXT:    cvt.rn.f64.u32 %fd4, %r10;
+; CHECK-NEXT:    add.rn.f64 %fd5, %fd4, %fd3;
+; CHECK-NEXT:    st.global.f64 [%rd1], %fd5;
+; CHECK-NEXT:    mov.u32 %r10, %r6;
+; CHECK-NEXT:    bra.uni $L__BB0_1;
 bb:
   br label %bb3

 bb3:                                              ; preds = %bb3, %bb
   %phi = phi i32 [ 0, %bb ], [ 1, %bb3 ]
-  ; CHECK:      call.uni (retval0),
-  ; CHECK-NEXT: quux,
-  ; CHECK-NEXT: (
-  ; CHECK-NEXT: param0
-  ; CHECK-NEXT: );
   %call = tail call double @quux(double 0.000000e+00)
   %mul = mul i32 %phi, %arg1
   %or = or i32 %arg2, %mul
```

https://github.com/llvm/llvm-project/pull/116522