| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -S -o - -basic-aa -domtree -gvn %s | FileCheck %s |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| |
| %struct.S1 = type { i32, i32 } |
| |
| @a2 = common global i32* null, align 8 |
| @a = common global i32* null, align 8 |
| @s1 = common global %struct.S1 zeroinitializer, align 8 |
| |
| ; Check that GVN doesn't determine %2 is partially redundant. |
| |
| define i32 @volatile_load(i32 %n) { |
| ; CHECK-LABEL: @volatile_load( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP6:%.*]] = icmp sgt i32 [[N:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[CMP6]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]] |
| ; CHECK: for.body.lr.ph: |
| ; CHECK-NEXT: [[TMP0:%.*]] = load i32*, i32** @a2, align 8, !tbaa [[TBAA5:![0-9]+]] |
| ; CHECK-NEXT: [[TMP1:%.*]] = load i32*, i32** @a, align 8, !tbaa [[TBAA5]] |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_LR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: [[S_09:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH]] ], [ [[ADD:%.*]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: [[P_08:%.*]] = phi i32* [ [[TMP0]], [[FOR_BODY_LR_PH]] ], [ [[INCDEC_PTR:%.*]], [[FOR_BODY]] ] |
| ; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[P_08]], align 4, !tbaa [[TBAA9:![0-9]+]] |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[TMP1]], i64 [[INDVARS_IV]] |
| ; CHECK-NEXT: store i32 [[TMP2]], i32* [[ARRAYIDX]], align 4, !tbaa [[TBAA9]] |
| ; CHECK-NEXT: [[TMP3:%.*]] = load volatile i32, i32* [[P_08]], align 4, !tbaa [[TBAA9]] |
| ; CHECK-NEXT: [[ADD]] = add nsw i32 [[TMP3]], [[S_09]] |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i32, i32* [[P_08]], i64 1 |
| ; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[N]] |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]] |
| ; CHECK: for.cond.for.end_crit_edge: |
| ; CHECK-NEXT: br label [[FOR_END]] |
| ; CHECK: for.end: |
| ; CHECK-NEXT: [[S_0_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_COND_FOR_END_CRIT_EDGE]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: ret i32 [[S_0_LCSSA]] |
| ; |
| entry: |
| %cmp6 = icmp sgt i32 %n, 0 |
| br i1 %cmp6, label %for.body.lr.ph, label %for.end |
| |
| for.body.lr.ph: |
| %0 = load i32*, i32** @a2, align 8, !tbaa !1 |
| %1 = load i32*, i32** @a, align 8, !tbaa !1 |
| br label %for.body |
| |
| for.body: |
| %indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ] |
| %s.09 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ] |
| %p.08 = phi i32* [ %0, %for.body.lr.ph ], [ %incdec.ptr, %for.body ] |
| %2 = load i32, i32* %p.08, align 4, !tbaa !5 |
| %arrayidx = getelementptr inbounds i32, i32* %1, i64 %indvars.iv |
| store i32 %2, i32* %arrayidx, align 4, !tbaa !5 |
| %3 = load volatile i32, i32* %p.08, align 4, !tbaa !5 |
| %add = add nsw i32 %3, %s.09 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %incdec.ptr = getelementptr inbounds i32, i32* %p.08, i64 1 |
| %lftr.wideiv = trunc i64 %indvars.iv.next to i32 |
| %exitcond = icmp ne i32 %lftr.wideiv, %n |
| br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge |
| |
| for.cond.for.end_crit_edge: |
| %add.lcssa = phi i32 [ %add, %for.body ] |
| br label %for.end |
| |
| for.end: |
| %s.0.lcssa = phi i32 [ %add.lcssa, %for.cond.for.end_crit_edge ], [ 0, %entry ] |
| ret i32 %s.0.lcssa |
| } |
| |
| ; %1 is partially redundant if %0 can be widened to a 64-bit load. |
| ; But we should not widen %0 to 64-bit load. |
| |
| define i32 @overaligned_load(i32 %a, i32* nocapture %b) !dbg !13 { |
| ; CHECK-LABEL: @overaligned_load( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A:%.*]], 0, !dbg [[DBG14:![0-9]+]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]], !dbg [[DBG14]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* getelementptr inbounds ([[STRUCT_S1:%.*]], %struct.S1* @s1, i64 0, i32 0), align 8, !dbg [[DBG15:![0-9]+]], !tbaa [[TBAA9]] |
| ; CHECK-NEXT: br label [[IF_END:%.*]], !dbg [[DBG15]] |
| ; CHECK: if.else: |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 2, !dbg [[DBG16:![0-9]+]] |
| ; CHECK-NEXT: store i32 10, i32* [[ARRAYIDX]], align 4, !dbg [[DBG16]], !tbaa [[TBAA9]] |
| ; CHECK-NEXT: br label [[IF_END]], !dbg [[DBG16]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ [[TMP0]], [[IF_THEN]] ], [ 0, [[IF_ELSE]] ] |
| ; CHECK-NEXT: [[P_0:%.*]] = phi i32* [ getelementptr inbounds ([[STRUCT_S1]], %struct.S1* @s1, i64 0, i32 0), [[IF_THEN]] ], [ [[B]], [[IF_ELSE]] ] |
| ; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, i32* [[P_0]], i64 1, !dbg [[DBG17:![0-9]+]] |
| ; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ADD_PTR]], align 4, !dbg [[DBG17]], !tbaa [[TBAA9]] |
| ; CHECK-NEXT: [[ADD1:%.*]] = add nsw i32 [[TMP1]], [[I_0]], !dbg [[DBG17]] |
| ; CHECK-NEXT: ret i32 [[ADD1]], !dbg [[DBG17]] |
| ; |
| entry: |
| %cmp = icmp sgt i32 %a, 0, !dbg !14 |
| br i1 %cmp, label %if.then, label %if.else, !dbg !14 |
| |
| if.then: |
| %0 = load i32, i32* getelementptr inbounds (%struct.S1, %struct.S1* @s1, i64 0, i32 0), align 8, !tbaa !5, !dbg !15 |
| br label %if.end, !dbg !15 |
| |
| if.else: |
| %arrayidx = getelementptr inbounds i32, i32* %b, i64 2, !dbg !16 |
| store i32 10, i32* %arrayidx, align 4, !tbaa !5, !dbg !16 |
| br label %if.end, !dbg !16 |
| |
| if.end: |
| %i.0 = phi i32 [ %0, %if.then ], [ 0, %if.else ] |
| %p.0 = phi i32* [ getelementptr inbounds (%struct.S1, %struct.S1* @s1, i64 0, i32 0), %if.then ], [ %b, %if.else ] |
| %add.ptr = getelementptr inbounds i32, i32* %p.0, i64 1, !dbg !17 |
| %1 = load i32, i32* %add.ptr, align 4, !tbaa !5, !dbg !17 |
| %add1 = add nsw i32 %1, %i.0, !dbg !17 |
| ret i32 %add1, !dbg !17 |
| } |
| |
| !1 = !{!2, !2, i64 0} |
| !2 = !{!"any pointer", !3, i64 0} |
| !3 = !{!"omnipotent char", !4, i64 0} |
| !4 = !{!"Simple C/C++ TBAA"} |
| !5 = !{!6, !6, i64 0} |
| !6 = !{!"int", !3, i64 0} |
| |
| !llvm.module.flags = !{!7, !8, !9} |
| !llvm.dbg.cu = !{!18} |
| !7 = !{i32 2, !"Dwarf Version", i32 4} |
| !8 = !{i32 2, !"Debug Info Version", i32 3} |
| !9 = !{i32 1, !"PIC Level", i32 2} |
| |
| !10 = !{} |
| !11 = !DISubroutineType(types: !10) |
| !12 = !DIFile(filename: "test.cpp", directory: "/tmp") |
| !13 = distinct !DISubprogram(name: "test", scope: !12, file: !12, line: 99, type: !11, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, unit: !18, retainedNodes: !10) |
| !14 = !DILocation(line: 100, column: 1, scope: !13) |
| !15 = !DILocation(line: 101, column: 1, scope: !13) |
| !16 = !DILocation(line: 102, column: 1, scope: !13) |
| !17 = !DILocation(line: 103, column: 1, scope: !13) |
| !18 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang", |
| file: !12, |
| isOptimized: true, flags: "-O2", |
| splitDebugFilename: "abc.debug", emissionKind: 2) |