mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-02 11:30:10 +00:00
One motivating example is to sink an instruction from a basic block which has two successors: one outside the loop, the other inside the loop. We should try to sink the instruction outside the loop. rdar://11980766 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161062 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.6 KiB
LLVM
55 lines
1.6 KiB
LLVM
; 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: 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
|
|
}
|