| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -verify-scev -passes='loop(require<iv-users>),loop-mssa(loop-simplifycfg)' -S %s | FileCheck --check-prefixes=CHECK,IVUSERS %s |
| ; RUN: opt -verify-scev -passes="indvars,loop-simplifycfg" -S %s | FileCheck --check-prefixes=CHECK,INDVARS %s |
| |
| target datalayout = "p:16:16-n16:32" |
| |
| define void @test_pr58179_remove_dead_block_from_loop() { |
| ; CHECK-LABEL: @test_pr58179_remove_dead_block_from_loop( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[A:%.*]] = alloca [10 x i64], align 1 |
| ; CHECK-NEXT: br label [[OUTER_HEADER:%.*]] |
| ; CHECK: outer.header: |
| ; CHECK-NEXT: br label [[OUTER_HEADER]] |
| ; |
| entry: |
| %a = alloca [10 x i64], align 1 |
| br label %outer.header |
| |
| outer.header: |
| br i1 false, label %inner, label %outer.header |
| |
| inner: |
| %iv = phi i16 [ 0, %outer.header ], [ %iv.next, %inner ] |
| %gep = getelementptr inbounds [10 x i64], ptr %a, i32 0, i16 %iv |
| store i64 0, ptr %gep |
| %iv.next = add nsw i16 %iv, 1 |
| br i1 false, label %inner, label %outer.header |
| } |
| |
| define void @test_remove_instrs_in_exit_block() { |
| ; IVUSERS-LABEL: @test_remove_instrs_in_exit_block( |
| ; IVUSERS-NEXT: entry: |
| ; IVUSERS-NEXT: [[A:%.*]] = alloca [10 x i64], align 1 |
| ; IVUSERS-NEXT: br label [[OUTER_HEADER:%.*]] |
| ; IVUSERS: outer.header: |
| ; IVUSERS-NEXT: [[OUTER_IV:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[OUTER_IV_NEXT:%.*]], [[OUTER_LATCH:%.*]] ] |
| ; IVUSERS-NEXT: switch i32 0, label [[OUTER_HEADER_SPLIT:%.*]] [ |
| ; IVUSERS-NEXT: i32 1, label [[OUTER_LATCH]] |
| ; IVUSERS-NEXT: ] |
| ; IVUSERS: outer.header.split: |
| ; IVUSERS-NEXT: br label [[INNER:%.*]] |
| ; IVUSERS: inner: |
| ; IVUSERS-NEXT: [[IV:%.*]] = phi i16 [ 0, [[OUTER_HEADER_SPLIT]] ], [ [[IV_NEXT:%.*]], [[INNER]] ] |
| ; IVUSERS-NEXT: [[GEP:%.*]] = getelementptr inbounds [10 x i64], ptr [[A]], i32 0, i16 [[IV]] |
| ; IVUSERS-NEXT: store i64 0, ptr [[GEP]], align 4 |
| ; IVUSERS-NEXT: [[L:%.*]] = call i16 @get() |
| ; IVUSERS-NEXT: [[IV_NEXT]] = add nsw i16 [[IV]], 1 |
| ; IVUSERS-NEXT: br label [[INNER]] |
| ; IVUSERS: outer.latch: |
| ; IVUSERS-NEXT: [[OUTER_IV_NEXT]] = add nsw i16 [[OUTER_IV]], 1 |
| ; IVUSERS-NEXT: [[CMP_2:%.*]] = icmp eq i16 poison, [[OUTER_IV]] |
| ; IVUSERS-NEXT: br i1 [[CMP_2]], label [[OUTER_HEADER]], label [[EXIT:%.*]] |
| ; IVUSERS: exit: |
| ; IVUSERS-NEXT: ret void |
| ; |
| ; INDVARS-LABEL: @test_remove_instrs_in_exit_block( |
| ; INDVARS-NEXT: entry: |
| ; INDVARS-NEXT: [[A:%.*]] = alloca [10 x i64], align 1 |
| ; INDVARS-NEXT: br label [[OUTER_HEADER:%.*]] |
| ; INDVARS: outer.header: |
| ; INDVARS-NEXT: [[OUTER_IV:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[OUTER_IV_NEXT:%.*]], [[OUTER_LATCH:%.*]] ] |
| ; INDVARS-NEXT: switch i32 0, label [[OUTER_HEADER_SPLIT:%.*]] [ |
| ; INDVARS-NEXT: i32 1, label [[OUTER_LATCH]] |
| ; INDVARS-NEXT: ] |
| ; INDVARS: outer.header.split: |
| ; INDVARS-NEXT: br label [[INNER:%.*]] |
| ; INDVARS: inner: |
| ; INDVARS-NEXT: [[IV:%.*]] = phi i16 [ 0, [[OUTER_HEADER_SPLIT]] ], [ [[IV_NEXT:%.*]], [[INNER]] ] |
| ; INDVARS-NEXT: [[GEP:%.*]] = getelementptr inbounds [10 x i64], ptr [[A]], i32 0, i16 [[IV]] |
| ; INDVARS-NEXT: store i64 0, ptr [[GEP]], align 4 |
| ; INDVARS-NEXT: [[L:%.*]] = call i16 @get() |
| ; INDVARS-NEXT: [[IV_NEXT]] = add nuw nsw i16 [[IV]], 1 |
| ; INDVARS-NEXT: br label [[INNER]] |
| ; INDVARS: outer.latch: |
| ; INDVARS-NEXT: [[OUTER_IV_NEXT]] = add nuw nsw i16 [[OUTER_IV]], 1 |
| ; INDVARS-NEXT: [[CMP_2:%.*]] = icmp eq i16 poison, [[OUTER_IV]] |
| ; INDVARS-NEXT: br i1 [[CMP_2]], label [[OUTER_HEADER]], label [[EXIT:%.*]] |
| ; INDVARS: exit: |
| ; INDVARS-NEXT: ret void |
| ; |
| entry: |
| %a = alloca [10 x i64], align 1 |
| br label %outer.header |
| |
| outer.header: |
| %outer.iv = phi i16 [ 0, %entry ], [ %outer.iv.next, %outer.latch ] |
| br label %inner |
| |
| inner: |
| %iv = phi i16 [ 0, %outer.header ], [ %iv.next, %inner ] |
| %gep = getelementptr inbounds [10 x i64], ptr %a, i32 0, i16 %iv |
| store i64 0, ptr %gep |
| %l = call i16 @get() |
| %iv.next = add nsw i16 %iv, 1 |
| br i1 true, label %inner, label %outer.latch |
| |
| outer.latch: |
| %l.lcssa = phi i16 [ %l, %inner ] |
| %outer.iv.next = add nsw i16 %outer.iv, 1 |
| %cmp.2 = icmp eq i16 %l.lcssa, %outer.iv |
| br i1 %cmp.2, label %outer.header, label %exit |
| |
| exit: |
| ret void |
| } |
| |
| declare i16 @get() |
| |
| define i32 @test_pr58489(i32 %a) { |
| ; CHECK-LABEL: @test_pr58489( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[C_1:%.*]] = icmp slt i32 [[A:%.*]], -23 |
| ; CHECK-NEXT: call void @llvm.assume(i1 [[C_1]]) |
| ; CHECK-NEXT: switch i32 0, label [[ENTRY_SPLIT:%.*]] [ |
| ; CHECK-NEXT: i32 1, label [[EXIT:%.*]] |
| ; CHECK-NEXT: ] |
| ; CHECK: entry.split: |
| ; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] |
| ; CHECK: loop.header: |
| ; CHECK-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY_SPLIT]] ], [ [[SHIFT:%.*]], [[LOOP_HEADER]] ] |
| ; CHECK-NEXT: [[C_2:%.*]] = icmp ne i32 [[P]], 0 |
| ; CHECK-NEXT: [[C_2_EXT:%.*]] = zext i1 [[C_2]] to i16 |
| ; CHECK-NEXT: call void @use(i16 [[C_2_EXT]]) |
| ; CHECK-NEXT: [[SHIFT]] = ashr exact i32 [[A]], 16 |
| ; CHECK-NEXT: br label [[LOOP_HEADER]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret i32 poison |
| ; |
| entry: |
| %c.1 = icmp slt i32 %a, -23 |
| call void @llvm.assume(i1 %c.1) |
| br label %loop.header |
| |
| loop.header: |
| %p = phi i32 [ 0, %entry ], [ %shift, %loop.latch ] |
| br label %loop.latch |
| |
| loop.latch: |
| %c.2 = icmp ne i32 %p, 0 |
| %c.2.ext = zext i1 %c.2 to i16 |
| call void @use(i16 %c.2.ext) |
| %shift = ashr exact i32 %a, 16 |
| switch i32 50, label %exit [ |
| i32 50, label %loop.header |
| ] |
| |
| exit: |
| %shift.lcssa = phi i32 [ %shift, %loop.latch ] |
| ret i32 %shift.lcssa |
| } |
| |
| declare void @llvm.assume(i1 noundef) #0 |
| |
| declare void @use(i16) |