forked from OSchip/llvm-project
38 lines
1.4 KiB
LLVM
38 lines
1.4 KiB
LLVM
; RUN: opt -verify-loop-info -irce -irce-print-range-checks -irce-print-changed-loops %s -S 2>&1 | FileCheck %s
|
|
; RUN: opt -verify-loop-info -passes='require<branch-prob>,loop(irce)' -irce-print-range-checks -irce-print-changed-loops %s -S 2>&1 | FileCheck %s
|
|
|
|
; CHECK: irce: loop has 1 inductive range checks:
|
|
; CHECK-NEXT:InductiveRangeCheck:
|
|
; CHECK-NEXT: Begin: %offset Step: 1 End: %len
|
|
; CHECK-NEXT: CheckUse: br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 Operand: 0
|
|
; CHECK-NEXT: irce: in function incrementing: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
|
|
|
|
define void @incrementing(i32 *%arr, i32 *%a_len_ptr, i32 %n, i32 %offset) {
|
|
entry:
|
|
%len = load i32, 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
|
|
%array.idx = add i32 %idx, %offset
|
|
%abc = icmp slt i32 %array.idx, %len
|
|
br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1
|
|
|
|
in.bounds:
|
|
%addr = getelementptr i32, 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}
|
|
!1 = !{!"branch_weights", i32 64, i32 4}
|