mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-10 06:54:54 +00:00
30 lines
1007 B
LLVM
30 lines
1007 B
LLVM
|
; RUN: llvm-as < %s | opt -scalar-evolution -analyze |& grep "Loop bb: ( -1 + ( -1 * %x) + %y) iterations!"
|
||
|
|
||
|
define i32 @f(i32 %x, i32 %y) {
|
||
|
entry:
|
||
|
%tmp63 = icmp ult i32 %x, %y ; <i1> [#uses=1]
|
||
|
br i1 %tmp63, label %bb.preheader, label %bb8
|
||
|
|
||
|
bb.preheader: ; preds = %entry
|
||
|
br label %bb
|
||
|
|
||
|
bb: ; preds = %bb3, %bb.preheader
|
||
|
%x_addr.0 = phi i32 [ %tmp2, %bb3 ], [ %x, %bb.preheader ] ; <i32> [#uses=1]
|
||
|
%tmp2 = add i32 %x_addr.0, 1 ; <i32> [#uses=3]
|
||
|
br label %bb3
|
||
|
|
||
|
bb3: ; preds = %bb
|
||
|
%tmp6 = icmp ult i32 %tmp2, %y ; <i1> [#uses=1]
|
||
|
br i1 %tmp6, label %bb, label %bb8.loopexit
|
||
|
|
||
|
bb8.loopexit: ; preds = %bb3
|
||
|
br label %bb8
|
||
|
|
||
|
bb8: ; preds = %bb8.loopexit, %entry
|
||
|
%x_addr.1 = phi i32 [ %x, %entry ], [ %tmp2, %bb8.loopexit ] ; <i32> [#uses=1]
|
||
|
br label %return
|
||
|
|
||
|
return: ; preds = %bb8
|
||
|
ret i32 %x_addr.1
|
||
|
}
|