[NFC][SYCL] Move llvm.fpbuiltin tests to Transforms (#16847)

This PR also adds a test that debug info is being reserved during
transformation.

Follow up for #16714

---------

Signed-off-by: Sidorov, Dmitry <[email protected]>

Author: MrSidims

llvm/test/CodeGen/Generic/fp-builtin-intrinsics-nomatch.ll renamed to llvm/test/Transforms/FPBuiltinFnSelection/Generic/fp-builtin-intrinsics-nomatch.ll

@@ -0,0 +1,45 @@
+; RUN: opt -fpbuiltin-fn-selection -S < %s | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64"
+target triple = "nvptx64-nvidia-cuda"
+
+; CHECK-LABEL: @test_fdiv
+; CHECK: %{{.*}} = call float @llvm.nvvm.div.approx.f(float %{{.*}}, float %{{.*}}){{.*}}, !dbg ![[#Loc1:]]
+; CHECK: %{{.*}} = fdiv float %{{.*}}, %{{.*}}, !dbg ![[#Loc2:]]
+; CHECK-DAG: [[#Loc1]] = !DILocation(line: 4, column: 1, scope: ![[#]])
+; CHECK-DAG: [[#Loc2]] = !DILocation(line: 5, column: 1, scope: ![[#]])
+define void @test_fdiv(float %d1, <2 x float> %v2d1,
+                       float %d2, <2 x float> %v2d2) {
+entry:
+  %t0 = call float @llvm.fpbuiltin.fdiv.f32(float %d1, float %d2) #0, !dbg !16
+  %t1 = call float @llvm.fpbuiltin.fdiv.f32(float %d1, float %d2) #1, !dbg !17
+  ret void
+}
+
+declare float @llvm.fpbuiltin.fdiv.f32(float, float)
+
+attributes #0 = { "fpbuiltin-max-error"="2.5" }
+attributes #1 = { "fpbuiltin-max-error"="0.5" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}
+!llvm.ident = !{!9}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 21.0.0git", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "example.c", directory: "/home")
+!2 = !{i32 7, !"Dwarf Version", i32 4}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = !{i32 1, !"wchar_size", i32 4}
+!5 = !{i32 8, !"PIC Level", i32 2}
+!6 = !{i32 7, !"PIE Level", i32 2}
+!7 = !{i32 7, !"uwtable", i32 2}
+!8 = !{i32 7, !"frame-pointer", i32 2}
+!9 = !{!"clang version 21.0.0git (https://github.com/llvm/llvm-project.git"}
+!10 = distinct !DISubprogram(name: "test_fdiv", scope: !11, file: !11, line: 3, type: !12, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !15)
+!11 = !DIFile(filename: "example.c", directory: "/home")
+!12 = !DISubroutineType(types: !13)
+!13 = !{null, !14, !14}
+!14 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)
+!15 = !{}
+!16 = !DILocation(line: 4, column: 1, scope: !10)
+!17 = !DILocation(line: 5, column: 1, scope: !10)