1 files changed, 56 insertions, 0 deletions
diff --git a/llvm/test/Transforms/DivRemPairs/X86/preserving-debugloc-realrem.ll b/llvm/test/Transforms/DivRemPairs/X86/preserving-debugloc-realrem.ll
new file mode 100644
index 0000000..d74c8b9
--- /dev/null
+++ b/llvm/test/Transforms/DivRemPairs/X86/preserving-debugloc-realrem.ll
@@ -0,0 +1,56 @@
+; RUN: opt -S -passes=div-rem-pairs -mtriple=x86_64-unknown-unknown < %s | FileCheck %s
+
+; Check that DivRemPairs's optimizeDivRem() propagates the debug location of
+; replaced `%rem` to the new srem or urem instruction.
+; @decompose_illegal_srem_same_block tests it when the operands of `%rem` is signed.
+; @decompose_illegal_urem_same_block tests it when the operands of `%rem` is unsigned.
+
+define void @decompose_illegal_srem_same_block(i32 %a, i32 %b) !dbg !5 {
+; CHECK-LABEL: define void @decompose_illegal_srem_same_block(
+; CHECK:         %rem.recomposed = srem i32 [[A:%.*]], [[B:%.*]], !dbg [[DBG10:![0-9]+]]
+  %div = sdiv i32 %a, %b, !dbg !8
+  %t0 = mul i32 %div, %b, !dbg !9
+  %rem = sub i32 %a, %t0, !dbg !10
+  call void @foo(i32 %rem, i32 %div), !dbg !11
+  ret void, !dbg !12
+}
+
+define void @decompose_illegal_urem_same_block(i32 %a, i32 %b) !dbg !13 {
+; CHECK-LABEL: define void @decompose_illegal_urem_same_block(
+; CHECK:         %rem.recomposed = urem i32 [[A:%.*]], [[B:%.*]], !dbg [[DBG16:![0-9]+]]
+  %div = udiv i32 %a, %b, !dbg !14
+  %t0 = mul i32 %div, %b, !dbg !15
+  %rem = sub i32 %a, %t0, !dbg !16
+  call void @foo(i32 %rem, i32 %div), !dbg !17
+  ret void, !dbg !18
+}
+
+declare void @foo(i32, i32)
+
+!llvm.dbg.cu = !{!0}
+!llvm.debugify = !{!2, !3}
+!llvm.module.flags = !{!4}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
+!1 = !DIFile(filename: "realrem_preverse.ll", directory: "/")
+!2 = !{i32 10}
+!3 = !{i32 0}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = distinct !DISubprogram(name: "decompose_illegal_srem_same_block", linkageName: "decompose_illegal_srem_same_block", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
+!6 = !DISubroutineType(types: !7)
+!7 = !{}
+!8 = !DILocation(line: 1, column: 1, scope: !5)
+!9 = !DILocation(line: 2, column: 1, scope: !5)
+!10 = !DILocation(line: 3, column: 1, scope: !5)
+!11 = !DILocation(line: 4, column: 1, scope: !5)
+!12 = !DILocation(line: 5, column: 1, scope: !5)
+!13 = distinct !DISubprogram(name: "decompose_illegal_urem_same_block", linkageName: "decompose_illegal_urem_same_block", scope: null, file: !1, line: 6, type: !6, scopeLine: 6, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
+!14 = !DILocation(line: 6, column: 1, scope: !13)
+!15 = !DILocation(line: 7, column: 1, scope: !13)
+!16 = !DILocation(line: 8, column: 1, scope: !13)
+!17 = !DILocation(line: 9, column: 1, scope: !13)
+!18 = !DILocation(line: 10, column: 1, scope: !13)
+
+; CHECK: [[DBG10]] = !DILocation(line: 3,
+; CHECK: [[DBG16]] = !DILocation(line: 8,
+