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; RUN: llc < %s -verify-machineinstrs -no-phi-elim-live-out-early-exit | FileCheck %s
target triple = "x86_64-apple-macosx10.8.0"
; The critical edge from for.cond to if.end2 should be split to avoid injecting
; copies into the loop. The use of %b after the loop causes interference that
; makes a copy necessary.
; <rdar://problem/11561842>
;
; CHECK: split_loop_exit
; CHECK: %for.cond
; CHECK-NOT: mov
; CHECK: je
define i32 @split_loop_exit(i32 %a, i32 %b, i8* nocapture %p) nounwind uwtable readonly ssp {
entry:
%cmp = icmp sgt i32 %a, 10
br i1 %cmp, label %for.cond, label %if.end2
for.cond: ; preds = %entry, %for.cond
%p.addr.0 = phi i8* [ %incdec.ptr, %for.cond ], [ %p, %entry ]
%incdec.ptr = getelementptr inbounds i8, i8* %p.addr.0, i64 1
%0 = load i8, i8* %p.addr.0, align 1
%tobool = icmp eq i8 %0, 0
br i1 %tobool, label %for.cond, label %if.end2
if.end2: ; preds = %for.cond, %entry
%r.0 = phi i32 [ %a, %entry ], [ %b, %for.cond ]
%add = add nsw i32 %r.0, %b
ret i32 %add
}
; CHECK: split_live_out
; CHECK: %while.body
; CHECK: cmp
; CHECK-NEXT: ja
define i8* @split_live_out(i32 %value, i8* %target) nounwind uwtable readonly ssp {
entry:
%cmp10 = icmp ugt i32 %value, 127
br i1 %cmp10, label %while.body.preheader, label %while.end
while.body.preheader: ; preds = %entry
br label %while.body
while.body: ; preds = %while.body.preheader, %while.body
%target.addr.012 = phi i8* [ %incdec.ptr, %while.body ], [ %target, %while.body.preheader ]
%value.addr.011 = phi i32 [ %shr, %while.body ], [ %value, %while.body.preheader ]
%or = or i32 %value.addr.011, 128
%conv = trunc i32 %or to i8
store i8 %conv, i8* %target.addr.012, align 1
%shr = lshr i32 %value.addr.011, 7
%incdec.ptr = getelementptr inbounds i8, i8* %target.addr.012, i64 1
%cmp = icmp ugt i32 %value.addr.011, 16383
br i1 %cmp, label %while.body, label %while.end.loopexit
while.end.loopexit: ; preds = %while.body
%incdec.ptr.lcssa = phi i8* [ %incdec.ptr, %while.body ]
%shr.lcssa = phi i32 [ %shr, %while.body ]
br label %while.end
while.end: ; preds = %while.end.loopexit, %entry
%target.addr.0.lcssa = phi i8* [ %target, %entry ], [ %incdec.ptr.lcssa, %while.end.loopexit ]
%value.addr.0.lcssa = phi i32 [ %value, %entry ], [ %shr.lcssa, %while.end.loopexit ]
%conv1 = trunc i32 %value.addr.0.lcssa to i8
store i8 %conv1, i8* %target.addr.0.lcssa, align 1
%incdec.ptr3 = getelementptr inbounds i8, i8* %target.addr.0.lcssa, i64 1
ret i8* %incdec.ptr3
}
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