mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
38 lines
1.0 KiB
LLVM
38 lines
1.0 KiB
LLVM
|
; RUN: opt -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
|
||
|
|
|
||
|
|
; Demonstrates that we don't currently handle the general expression
|
||
|
|
; `A * I + B'.
|
||
|
|
|
||
|
|
define void @general_affine_expressions(i32 *%arr, i32 *%a_len_ptr, i32 %n,
|
||
|
|
i32 %scale, i32 %offset) {
|
||
|
|
; CHECK-NOT: constrained Loop at depth
|
||
|
|
entry:
|
||
|
|
%len = load i32* %a_len_ptr, !range !0
|
||
|
|
%first.itr.check = icmp sgt i32 %n, 0
|
||
|
|
br i1 %first.itr.check, label %loop, label %exit
|
||
|
|
|
||
|
|
loop:
|
||
|
|
%idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ]
|
||
|
|
%idx.next = add i32 %idx, 1
|
||
|
|
%idx.mul = mul i32 %idx, %scale
|
||
|
|
%array.idx = add i32 %idx.mul, %offset
|
||
|
|
%abc.high = icmp slt i32 %array.idx, %len
|
||
|
|
%abc.low = icmp sge i32 %array.idx, 0
|
||
|
|
%abc = and i1 %abc.low, %abc.high
|
||
|
|
br i1 %abc, label %in.bounds, label %out.of.bounds
|
||
|
|
|
||
|
|
in.bounds:
|
||
|
|
%addr = getelementptr i32* %arr, i32 %array.idx
|
||
|
|
store i32 0, i32* %addr
|
||
|
|
%next = icmp slt i32 %idx.next, %n
|
||
|
|
br i1 %next, label %loop, label %exit
|
||
|
|
|
||
|
|
out.of.bounds:
|
||
|
|
ret void
|
||
|
|
|
||
|
|
exit:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
!0 = !{i32 0, i32 2147483647}
|