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TheRock/compiler/amd-llvm/llvm/test/Transforms/LoopDeletion/invalidation.ll
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

43 lines
1.1 KiB
LLVM

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