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; REQUIRES: asserts
; RUN: opt < %s -S -debug-only=loop-unroll -passes=loop-unroll -unroll-runtime 2>&1 | FileCheck %s
; RUN: opt < %s -S -debug-only=loop-unroll -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s
; Regression test for setting the correct idom for exit blocks.
; CHECK: Loop Unroll: F[basic]
; CHECK: PEELING loop %for.body with iteration count 2!
define i32 @basic(ptr %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 {
entry:
br label %for.body
for.body:
%i.05 = phi i32 [ 0, %entry ], [ %inc, %latch ]
%p.addr.04 = phi ptr [ %p, %entry ], [ %incdec.ptr, %latch ]
%incdec.ptr = getelementptr inbounds i32, ptr %p.addr.04, i32 1
store i32 %i.05, ptr %p.addr.04, align 4
%inc = add nsw i32 %i.05, 1
%cmp = icmp slt i32 %inc, %k
br i1 %c1, label %left, label %right
left:
br label %latch
right:
br i1 %c1, label %latch, label %side_exit, !prof !2
latch:
br i1 %cmp, label %for.body, label %for.end, !prof !1
for.end:
ret i32 %inc
side_exit:
%rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]
ret i32 %rval
}
declare i32 @llvm.experimental.deoptimize.i32(...)
attributes #0 = { nounwind }
!1 = !{!"branch_weights", i32 1, i32 1}
!2 = !{!"branch_weights", i32 1, i32 0}
!3 = !{!"function_entry_count", i64 1}
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