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| ; RUN: llc -mtriple=x86_64-apple-darwin < %s | FileCheck %s
; A MOV32ri is inside a loop, it has two successors, one successor is inside the
; same loop, the other successor is outside the loop. We should be able to sink
; MOV32ri outside the loop.
; rdar://11980766
define i32 @sink_succ(i32 %argc, i8** nocapture %argv) nounwind uwtable ssp {
; CHECK-LABEL: sink_succ
; CHECK: [[OUTER_LN1:LBB0_[0-9]+]]: ## %preheader
; CHECK: %exit
; CHECK-NOT: movl
; CHECK: jne [[OUTER_LN1]]
; CHECK: movl
; CHECK: [[LN2:LBB0_[0-9]+]]: ## %for.body2
; CHECK: jne [[LN2]]
; CHECK: ret
entry:
br label %preheader
preheader:
%i.127 = phi i32 [ 0, %entry ], [ %inc9, %exit ]
br label %for.body1.lr
for.body1.lr:
%iv30 = phi i32 [ 1, %preheader ], [ %iv.next31, %for.inc40.i ]
br label %for.body1
for.body1:
%iv.i = phi i64 [ 0, %for.body1.lr ], [ %iv.next.i, %for.body1 ]
%iv.next.i = add i64 %iv.i, 1
%lftr.wideiv32 = trunc i64 %iv.next.i to i32
%exitcond33 = icmp eq i32 %lftr.wideiv32, %iv30
br i1 %exitcond33, label %for.inc40.i, label %for.body1
for.inc40.i:
%iv.next31 = add i32 %iv30, 1
%exitcond49.i = icmp eq i32 %iv.next31, 32
br i1 %exitcond49.i, label %exit, label %for.body1.lr
exit:
%inc9 = add nsw i32 %i.127, 1
%exitcond34 = icmp eq i32 %inc9, 10
br i1 %exitcond34, label %for.body2, label %preheader
for.body2:
%iv = phi i64 [ %iv.next, %for.body2 ], [ 0, %exit ]
%iv.next = add i64 %iv, 1
%lftr.wideiv = trunc i64 %iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 2048
br i1 %exitcond, label %for.end20, label %for.body2
for.end20:
ret i32 0
}
define i32 @sink_out_of_loop(i32 %n, i32* %output) {
; CHECK-LABEL: sink_out_of_loop:
entry:
br label %loop
loop:
%i = phi i32 [ 0, %entry ], [ %i2, %loop ]
%j = mul i32 %i, %i
%addr = getelementptr i32, i32* %output, i32 %i
store i32 %i, i32* %addr
%i2 = add i32 %i, 1
%exit_cond = icmp sge i32 %i2, %n
br i1 %exit_cond, label %exit, label %loop
exit:
; CHECK: %bb.2
; CHECK: imull %eax, %eax
; CHECK: retq
ret i32 %j
}
|