43 lines
1.1 KiB
LLVM
43 lines
1.1 KiB
LLVM
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; Ensure we don't run analyses over loops after they've been deleted. We run
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; one version with a no-op loop pass to make sure that the loop doesn't get
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; simplified away.
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;
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; RUN: opt < %s -passes='require<iv-users>,no-op-loop,require<iv-users>' -S \
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; RUN: | FileCheck %s --check-prefixes=CHECK,BEFORE
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; RUN: opt < %s -passes='require<iv-users>,loop-deletion,require<iv-users>' -S \
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; RUN: | FileCheck %s --check-prefixes=CHECK,AFTER
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define void @foo(i64 %n, i64 %m) nounwind {
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; CHECK-LABEL: @foo(
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entry:
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br label %bb
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; CHECK: entry:
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; BEFORE-NEXT: br label %bb
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; AFTER-NEXT: br label %return
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bb:
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%x.0 = phi i64 [ 0, %entry ], [ %t0, %bb2 ]
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%t0 = add i64 %x.0, 1
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%t1 = icmp slt i64 %x.0, %n
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br i1 %t1, label %bb2, label %return
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; BEFORE: bb:
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; BEFORE: br i1 {{.*}}, label %bb2, label %return
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; AFTER-NOT: bb:
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; AFTER-NOT: br
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bb2:
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%t2 = icmp slt i64 %x.0, %m
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br i1 %t1, label %bb, label %return
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; BEFORE: bb2:
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; BEFORE: br i1 {{.*}}, label %bb, label %return
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; AFTER-NOT: bb2:
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; AFTER-NOT: br
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return:
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ret void
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; CHECK: return:
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; CHECK-NEXT: ret void
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}
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