3ef33066bb
If UnJ completely unrolls a loop and removes it entirely, the loop remains in the current loop nest. If the loop nest gets reused the loops will no longer be valid. As there is no way to remove a loop from a LoopNest, this patch removes the preserve of the LoopNestAnalysis so that it will be regenerated. Fixes #124518
37 lines
1.3 KiB
LLVM
37 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes="loop(invalidate<all>,loop-unroll-and-jam,loop-unroll-and-jam)" -allow-unroll-and-jam -unroll-and-jam-count=4 < %s -S | FileCheck %s
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; This test completely unrolls the middle loop out of a 3-deep loop nest.
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define i16 @test_it() {
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; CHECK-LABEL: define i16 @test_it() {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br label %[[FOR_COND:.*]]
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; CHECK: [[FOR_COND_LOOPEXIT:.*]]:
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; CHECK-NEXT: br label %[[FOR_COND]]
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; CHECK: [[FOR_COND]]:
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; CHECK-NEXT: br label %[[DO_BODY2:.*]]
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; CHECK: [[DO_BODY2]]:
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; CHECK-NEXT: br label %[[WHILE_COND3:.*]]
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; CHECK: [[WHILE_COND3]]:
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; CHECK-NEXT: br i1 true, label %[[DO_COND:.*]], label %[[WHILE_COND3]]
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; CHECK: [[DO_COND]]:
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; CHECK-NEXT: br label %[[FOR_COND_LOOPEXIT]]
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;
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entry:
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br label %for.cond
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for.cond: ; preds = %do.cond, %entry
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br label %do.body2
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do.body2: ; preds = %do.cond, %for.cond
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br label %while.cond3
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while.cond3: ; preds = %while.cond3, %do.body2
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br i1 true, label %do.cond, label %while.cond3
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do.cond: ; preds = %while.cond3
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br i1 true, label %for.cond, label %do.body2
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}
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