54 lines
1.3 KiB
LLVM
54 lines
1.3 KiB
LLVM
; RUN: opt -loop-unroll -debug-only=loop-unroll -disable-output < %s
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; REQUIRES: asserts
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; Compile this test with debug flag on to verify domtree right after loop unrolling.
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target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
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; PR27157
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define void @foo() {
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entry:
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br label %loop_header
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loop_header:
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%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
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br i1 undef, label %loop_latch, label %loop_exiting_bb1
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loop_exiting_bb1:
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br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
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loop_exiting_bb2:
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br i1 false, label %loop_latch, label %bb
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bb:
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br label %exit1
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loop_latch:
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%iv_next = add nuw nsw i64 %iv, 1
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%cmp = icmp ne i64 %iv_next, 2
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br i1 %cmp, label %loop_header, label %exit2
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exit1.loopexit:
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br label %exit1
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exit1:
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ret void
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exit2:
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ret void
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}
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define void @foo2() {
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entry:
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br label %loop.header
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loop.header:
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%iv = phi i32 [ 0, %entry ], [ %iv.inc, %latch ]
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%iv.inc = add i32 %iv, 1
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br i1 undef, label %diamond, label %latch
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diamond:
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br i1 undef, label %left, label %right
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left:
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br i1 undef, label %exit, label %merge
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right:
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br i1 undef, label %exit, label %merge
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merge:
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br label %latch
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latch:
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%end.cond = icmp eq i32 %iv, 1
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br i1 %end.cond, label %exit1, label %loop.header
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exit:
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ret void
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exit1:
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ret void
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}
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