Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/AddDiscriminators/memcpy-discriminator.ll

@@ -1,104 +0,0 @@
-; RUN: opt < %s -add-discriminators -sroa -S | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-
-; Test case obtained from the following C code:
-
-; struct A {
-;  int field1;
-;  short field2;
-; };
-;
-; struct B {
-;   struct A field1;
-;   int field2;
-; };
-;
-;
-; extern struct B g_b;
-; extern int bar(struct B b, int c);
-;
-; int foo(int cond) {
-;   int result = cond ? bar(g_b, 33) : 42;
-;   return result;
-; }
-
-; In this test, global variable g_b is passed by copy to function bar. That
-; copy is located on the stack (see alloca %g_b.coerce), and it is initialized
-; by a memcpy call.
-;
-; SROA would split alloca %g_b.coerce into two (smaller disjoint) slices:
-; slice [0,8) and slice [8, 12). Users of the original alloca are rewritten
-; as users of the new alloca slices.
-; In particular, the memcpy is rewritten by SROA as two load/store pairs.
-;
-; Later on, mem2reg successfully promotes the new alloca slices to registers,
-; and loads %3 and %5 are made redundant by the loads obtained from the memcpy
-; intrinsic expansion.
-;
-; If pass AddDiscriminators doesn't assign a discriminator to the intrinsic
-; memcpy call, then the loads obtained from the memcpy expansion would not have
-; a correct discriminator.
-;
-; This test checks that the two new loads inserted by SROA in %cond.true
-; correctly reference a debug location with a non-zero discriminator. This test
-; also checks that the same discriminator is used by all instructions from
-; basic block %cond.true.
-
-%struct.B = type { %struct.A, i32 }
-%struct.A = type { i32, i16 }
-
-@g_b = external global %struct.B, align 4
-
-define i32 @foo(i32 %cond) #0 !dbg !5 {
-entry:
-  %g_b.coerce = alloca { i64, i32 }, align 4
-  %tobool = icmp ne i32 %cond, 0, !dbg !7
-  br i1 %tobool, label %cond.true, label %cond.end, !dbg !7
-
-cond.true:
-; CHECK-LABEL: cond.true:
-; CHECK:       load i64, {{.*}}, !dbg ![[LOC:[0-9]+]]
-; CHECK-NEXT:  load i32, {{.*}}, !dbg ![[LOC]]
-; CHECK-NEXT:  %call = call i32 @bar({{.*}}), !dbg ![[LOC]]
-; CHECK-NEXT:  br label %cond.end, !dbg ![[BR_LOC:[0-9]+]]
-
-; CHECK-DAG: ![[LOC]] = !DILocation(line: 16, column: 23, scope: ![[SCOPE:[0-9]+]])
-; CHECK-DAG: ![[SCOPE]] = !DILexicalBlockFile({{.*}}, discriminator: 2)
-; CHECK-DAG: ![[BR_LOC]] = !DILocation(line: 16, column: 16, scope: ![[SCOPE]])
-
-  %0 = bitcast { i64, i32 }* %g_b.coerce to i8*, !dbg !8
-  %1 = bitcast %struct.B* @g_b to i8*, !dbg !8
-  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 12, i32 4, i1 false), !dbg !8
-  %2 = getelementptr inbounds { i64, i32 }, { i64, i32 }* %g_b.coerce, i32 0, i32 0, !dbg !8
-  %3 = load i64, i64* %2, align 4, !dbg !8
-  %4 = getelementptr inbounds { i64, i32 }, { i64, i32 }* %g_b.coerce, i32 0, i32 1, !dbg !8
-  %5 = load i32, i32* %4, align 4, !dbg !8
-  %call = call i32 @bar(i64 %3, i32 %5, i32 33), !dbg !8
-  br label %cond.end, !dbg !7
-
-cond.end:                                         ; preds = %entry, %cond.true
-  %cond1 = phi i32 [ %call, %cond.true ], [ 42, %entry ], !dbg !7
-  ret i32 %cond1, !dbg !9
-}
-
-declare i32 @bar(i64, i32, i32)
-
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1) #1
-
-attributes #0 = { noinline nounwind uwtable }
-attributes #1 = { argmemonly nounwind }
-
-!llvm.dbg.cu = !{!0}
-!llvm.module.flags = !{!3, !4}
-
-!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
-!1 = !DIFile(filename: "test.c", directory: ".")
-!2 = !{}
-!3 = !{i32 2, !"Dwarf Version", i32 4}
-!4 = !{i32 2, !"Debug Info Version", i32 3}
-!5 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 15, type: !6, isLocal: false, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
-!6 = !DISubroutineType(types: !2)
-!7 = !DILocation(line: 16, column: 16, scope: !5)
-!8 = !DILocation(line: 16, column: 23, scope: !5)
-!9 = !DILocation(line: 17, column: 3, scope: !5)