1 ; RUN: llc -start-after=codegenprepare -stop-before=finalize-isel -o - < %s \
2 ; RUN: -experimental-debug-variable-locations=false \
3 ; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE
4 ; RUN: llc -start-after=codegenprepare -stop-before=finalize-isel -o - < %s \
5 ; RUN: -experimental-debug-variable-locations=true \
6 ; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF
8 ;; Test for correct placement of DBG_VALUE, which in PR40427 is placed before
9 ;; the load instruction it refers to. The circumstance replicated here is where
10 ;; two instructions in a row, trunc and add, begin with no-op Copy{To,From}Reg
11 ;; SDNodes that produce no instructions.
12 ;; The DBG_VALUE instruction should come immediately after the load instruction
13 ;; because the truncate is optimised out, and the DBG_VALUE should be placed
14 ;; in front of the first instruction that occurs after the dbg.value.
17 ; CHECK: ![[DBGVAR:[0-9]+]] = !DILocalVariable(name: "bees",
19 target triple = "x86_64-unknown-linux-gnu"
21 define i16 @lolwat(i1 %spoons, ptr %bees, i16 %yellow, ptr %more) {
23 br i1 %spoons, label %trueb, label %falseb
29 ; CHECK: [[PHIREG:%[0-9]+]]:gr64 = PHI %6, %bb.2, %4, %bb.1
30 ; CHECK-NEXT: [[LOADR:%[0-9]+]]:gr16 = MOV16rm %0,
31 ; INSTRREF-SAME: debug-instr-number 1
32 ; DBGVALUE-NEXT: DBG_VALUE [[LOADR]], $noreg, ![[DBGVAR]]
33 ; INSTRREF-NEXT: DBG_INSTR_REF ![[DBGVAR]], {{.+}}, dbg-instr-ref(1, 0)
34 ; CHECK-NEXT: %{{[0-9]+}}:gr32 = IMPLICIT_DEF
35 %foo = phi ptr[%bees, %trueb], [%more, %falseb]
36 %ret = load i32, ptr %foo, !dbg !6
37 %cast = trunc i32 %ret to i16, !dbg !6
38 call void @llvm.dbg.value(metadata i16 %cast, metadata !1, metadata !DIExpression()), !dbg !6
39 %orly2 = add i16 %yellow, 1
42 %cheese = add i16 %orly2, %cast
43 ret i16 %cheese, !dbg !6
46 declare void @llvm.dbg.value(metadata, metadata, metadata)
48 !llvm.module.flags = !{!4}
50 !1 = !DILocalVariable(name: "bees", scope: !5, type: null)
51 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "beards", isOptimized: true, runtimeVersion: 4, emissionKind: FullDebug)
52 !3 = !DIFile(filename: "bees.cpp", directory: "")
53 !4 = !{i32 2, !"Debug Info Version", i32 3}
54 !5 = distinct !DISubprogram(name: "nope", scope: !2, file: !3, line: 1, unit: !2)
55 !6 = !DILocation(line: 0, scope: !5)
56 !7 = !DILocalVariable(name: "flannel", scope: !5, type: null)