53 lines
1.3 KiB
LLVM
53 lines
1.3 KiB
LLVM
; RUN: opt < %s -S -O2 -unroll-runtime=true -unroll-runtime-epilog=true | FileCheck %s -check-prefix=EPILOG
|
|
; RUN: opt < %s -S -O2 -unroll-runtime=true -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
|
|
|
|
; Check runtime unrolling prologue can be promoted by LICM pass.
|
|
|
|
; EPILOG: entry:
|
|
; EPILOG: %xtraiter
|
|
; EPILOG: %lcmp.mod
|
|
; EPILOG: loop1:
|
|
; EPILOG: br i1 %lcmp.mod
|
|
; EPILOG: loop2.epil:
|
|
|
|
; PROLOG: entry:
|
|
; PROLOG: %xtraiter
|
|
; PROLOG: %lcmp.mod
|
|
; PROLOG: loop1:
|
|
; PROLOG: br i1 %lcmp.mod
|
|
; PROLOG: loop2.prol:
|
|
|
|
define void @unroll(i32 %iter, i32* %addr1, i32* %addr2) nounwind {
|
|
entry:
|
|
br label %loop1
|
|
|
|
loop1:
|
|
%iv1 = phi i32 [ 0, %entry ], [ %inc1, %loop1.latch ]
|
|
%offset1 = getelementptr i32, i32* %addr1, i32 %iv1
|
|
store i32 %iv1, i32* %offset1, align 4
|
|
br label %loop2.header
|
|
|
|
loop2.header:
|
|
%e = icmp uge i32 %iter, 1
|
|
br i1 %e, label %loop2, label %exit2
|
|
|
|
loop2:
|
|
%iv2 = phi i32 [ 0, %loop2.header ], [ %inc2, %loop2 ]
|
|
%offset2 = getelementptr i32, i32* %addr2, i32 %iv2
|
|
store i32 %iv2, i32* %offset2, align 4
|
|
%inc2 = add i32 %iv2, 1
|
|
%exitcnd2 = icmp uge i32 %inc2, %iter
|
|
br i1 %exitcnd2, label %exit2, label %loop2
|
|
|
|
exit2:
|
|
br label %loop1.latch
|
|
|
|
loop1.latch:
|
|
%inc1 = add i32 %iv1, 1
|
|
%exitcnd1 = icmp uge i32 %inc1, 1024
|
|
br i1 %exitcnd1, label %exit, label %loop1
|
|
|
|
exit:
|
|
ret void
|
|
}
|