1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -passes=loop-vectorize -S | FileCheck %s
4 ; This is a bugpoint reduction of a test from PR43582:
5 ; https://bugs.llvm.org/show_bug.cgi?id=43582
7 ; ...but it's over-simplifying the underlying question:
8 ; TODO: Should this be vectorized rather than allowing the backend to load combine?
9 ; The original code is a bswap pattern.
11 target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
12 target triple = "x86_64-w64-windows-gnu"
14 define void @cff_index_load_offsets(i1 %cond, i8 %x, ptr %p) #0 {
15 ; CHECK-LABEL: @cff_index_load_offsets(
17 ; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[EXIT:%.*]]
19 ; CHECK-NEXT: br label [[FOR_BODY68:%.*]]
21 ; CHECK-NEXT: [[P_359:%.*]] = phi ptr [ [[ADD_PTR86:%.*]], [[FOR_BODY68]] ], [ null, [[IF_THEN]] ]
22 ; CHECK-NEXT: [[CONV70:%.*]] = zext i8 [[X:%.*]] to i32
23 ; CHECK-NEXT: [[SHL71:%.*]] = shl nuw i32 [[CONV70]], 24
24 ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[P:%.*]], align 1, !tbaa [[TBAA1:![0-9]+]]
25 ; CHECK-NEXT: [[CONV73:%.*]] = zext i8 [[TMP0]] to i32
26 ; CHECK-NEXT: [[SHL74:%.*]] = shl nuw nsw i32 [[CONV73]], 16
27 ; CHECK-NEXT: [[OR75:%.*]] = or i32 [[SHL74]], [[SHL71]]
28 ; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr undef, align 1, !tbaa [[TBAA1]]
29 ; CHECK-NEXT: [[SHL78:%.*]] = shl nuw nsw i32 undef, 8
30 ; CHECK-NEXT: [[OR79:%.*]] = or i32 [[OR75]], [[SHL78]]
31 ; CHECK-NEXT: [[CONV81:%.*]] = zext i8 [[TMP1]] to i32
32 ; CHECK-NEXT: [[OR83:%.*]] = or i32 [[OR79]], [[CONV81]]
33 ; CHECK-NEXT: store i32 [[OR83]], ptr undef, align 4, !tbaa [[TBAA4:![0-9]+]]
34 ; CHECK-NEXT: [[ADD_PTR86]] = getelementptr inbounds i8, ptr [[P_359]], i64 4
35 ; CHECK-NEXT: [[CMP66:%.*]] = icmp ult ptr [[ADD_PTR86]], undef
36 ; CHECK-NEXT: br i1 [[CMP66]], label [[FOR_BODY68]], label [[SW_EPILOG:%.*]]
38 ; CHECK-NEXT: unreachable
40 ; CHECK-NEXT: ret void
43 br i1 %cond, label %if.then, label %Exit
45 if.then: ; preds = %entry
48 for.body68: ; preds = %for.body68, %if.then
49 %p.359 = phi ptr [ %add.ptr86, %for.body68 ], [ null, %if.then ]
50 %conv70 = zext i8 %x to i32
51 %shl71 = shl nuw i32 %conv70, 24
52 %0 = load i8, ptr %p, align 1, !tbaa !1
53 %conv73 = zext i8 %0 to i32
54 %shl74 = shl nuw nsw i32 %conv73, 16
55 %or75 = or i32 %shl74, %shl71
56 %1 = load i8, ptr undef, align 1, !tbaa !1
57 %shl78 = shl nuw nsw i32 undef, 8
58 %or79 = or i32 %or75, %shl78
59 %conv81 = zext i8 %1 to i32
60 %or83 = or i32 %or79, %conv81
61 store i32 %or83, ptr undef, align 4, !tbaa !4
62 %add.ptr86 = getelementptr inbounds i8, ptr %p.359, i64 4
63 %cmp66 = icmp ult ptr %add.ptr86, undef
64 br i1 %cmp66, label %for.body68, label %sw.epilog
66 sw.epilog: ; preds = %for.body68
69 Exit: ; preds = %entry
73 attributes #0 = { "use-soft-float"="false" }
77 !0 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 0fedc26a0dc0066f3968b9fea6a4e1f746c8d5a4)"}
79 !2 = !{!"omnipotent char", !3, i64 0}
80 !3 = !{!"Simple C/C++ TBAA"}
82 !5 = !{!"long", !2, i64 0}