[Mlir-commits] [llvm] [mlir] [MLIR][NVVM] Add globaltimer_lo support in NVVM Dialect and NVPTX backend (PR #154672)

[Guray Ozen]

================
@@ -267,6 +267,23 @@ define i64 @test_globaltimer() {
   ret i64 %ret
 }
 
+define i32 @test_globaltimer_lo(){
+; CHECK-LABEL: test_globaltimer_lo(
+; CHECK:       {
+; CHECK-NEXT:    .reg .b32 %r<4>;
+; CHECK-EMPTY:
+; CHECK-NEXT:  // %bb.0:
+; CHECK-NEXT:    mov.u32 %r1, %globaltimer_lo;
+; CHECK-NEXT:    mov.u32 %r2, %globaltimer_lo;
+; CHECK-NEXT:    add.s32 %r3, %r1, %r2;
+; CHECK-NEXT:    st.param.b32 [func_retval0], %r3;
+; CHECK-NEXT:    ret;
+  %a = tail call i32 @llvm.nvvm.read.ptx.sreg.globaltimer.lo()
+  %b = tail call i32 @llvm.nvvm.read.ptx.sreg.globaltimer.lo()
+  %ret = add i32 %a, %b
----------------
grypp wrote:

It's better to split llvm and mlir PRs. It's okay for now

https://github.com/llvm/llvm-project/pull/154672