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[tests] Add some basic coverage of multiple exit unrolling
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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
| ; RUN: opt -loop-unroll -S < %s | FileCheck %s | ||
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| declare void @bar() | ||
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| ; TODO: We should unroll by 10, not 20 here | ||
| define void @test1() { | ||
| ; CHECK-LABEL: @test1( | ||
| ; CHECK-NEXT: entry: | ||
| ; CHECK-NEXT: br label [[LOOP:%.*]] | ||
| ; CHECK: loop: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH:%.*]], label [[EXIT:%.*]] | ||
| ; CHECK: latch: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_1:%.*]], label [[EXIT]] | ||
| ; CHECK: exit: | ||
| ; CHECK-NEXT: ret void | ||
| ; CHECK: latch.1: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_2:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.2: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_3:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.3: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_4:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.4: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_5:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.5: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_6:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.6: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_7:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.7: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_8:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.8: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 true, label [[LATCH_9:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.9: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_10:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.10: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_11:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.11: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_12:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.12: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_13:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.13: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_14:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.14: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_15:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.15: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_16:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.16: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_17:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.17: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_18:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.18: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_19:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.19: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br i1 false, label [[LATCH_20:%.*]], label [[EXIT]] | ||
| ; CHECK: latch.20: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: br label [[EXIT]] | ||
| ; | ||
| entry: | ||
| br label %loop | ||
| loop: | ||
| %iv = phi i64 [0, %entry], [%iv.next, %latch] | ||
| %iv.next = add i64 %iv, 1 | ||
| call void @bar() | ||
| %cmp1 = icmp ult i64 %iv, 10 | ||
| br i1 %cmp1, label %latch, label %exit | ||
| latch: | ||
| call void @bar() | ||
| %cmp2 = icmp ult i64 %iv, 20 | ||
| br i1 %cmp2, label %loop, label %exit | ||
| exit: | ||
| ret void | ||
| } | ||
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||
| ; TODO: We should fully unroll this by 10, leave the unrolled latch | ||
| ; tests since we don't know if %N < 10, and break the backedge. | ||
| define void @test2(i64 %N) { | ||
| ; CHECK-LABEL: @test2( | ||
| ; CHECK-NEXT: entry: | ||
| ; CHECK-NEXT: br label [[LOOP:%.*]] | ||
| ; CHECK: loop: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ] | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ule i64 [[IV]], 10 | ||
| ; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT:%.*]] | ||
| ; CHECK: latch: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp ule i64 [[IV]], [[N:%.*]] | ||
| ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT]] | ||
| ; CHECK: exit: | ||
| ; CHECK-NEXT: ret void | ||
| ; | ||
| entry: | ||
| br label %loop | ||
| loop: | ||
| %iv = phi i64 [0, %entry], [%iv.next, %latch] | ||
| %iv.next = add i64 %iv, 1 | ||
| call void @bar() | ||
| %cmp1 = icmp ule i64 %iv, 10 | ||
| br i1 %cmp1, label %latch, label %exit | ||
| latch: | ||
| call void @bar() | ||
| %cmp2 = icmp ule i64 %iv, %N | ||
| br i1 %cmp2, label %loop, label %exit | ||
| exit: | ||
| ret void | ||
| } | ||
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| ; TODO: We could partially unroll this by 2. | ||
| define void @test3(i64 %N, i64 %M) { | ||
| ; CHECK-LABEL: @test3( | ||
| ; CHECK-NEXT: entry: | ||
| ; CHECK-NEXT: [[N_MASKED:%.*]] = and i64 [[N:%.*]], 65520 | ||
| ; CHECK-NEXT: [[M_MASKED:%.*]] = and i64 [[M:%.*]], 65520 | ||
| ; CHECK-NEXT: br label [[LOOP:%.*]] | ||
| ; CHECK: loop: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ] | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1 | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: [[CMP1:%.*]] = icmp ule i64 [[IV]], [[N_MASKED]] | ||
| ; CHECK-NEXT: br i1 [[CMP1]], label [[LATCH]], label [[EXIT:%.*]] | ||
| ; CHECK: latch: | ||
| ; CHECK-NEXT: call void @bar() | ||
| ; CHECK-NEXT: [[CMP2:%.*]] = icmp ule i64 [[IV]], [[M_MASKED]] | ||
| ; CHECK-NEXT: br i1 [[CMP2]], label [[LOOP]], label [[EXIT]] | ||
| ; CHECK: exit: | ||
| ; CHECK-NEXT: ret void | ||
| ; | ||
| entry: | ||
| %N.masked = and i64 %N, 65520 ; 0xfff0 | ||
| %M.masked = and i64 %M, 65520 ; 0xfff0 | ||
| br label %loop | ||
| loop: | ||
| %iv = phi i64 [0, %entry], [%iv.next, %latch] | ||
| %iv.next = add i64 %iv, 1 | ||
| call void @bar() | ||
| %cmp1 = icmp ule i64 %iv, %N.masked | ||
| br i1 %cmp1, label %latch, label %exit | ||
| latch: | ||
| call void @bar() | ||
| %cmp2 = icmp ule i64 %iv, %M.masked | ||
| br i1 %cmp2, label %loop, label %exit | ||
| exit: | ||
| ret void | ||
| } |