1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -O3 -S < %s                    | FileCheck %s
3; RUN: opt -passes='default<O3>' -S < %s  | FileCheck %s
4
5; This should become a single funnel shift through a combination
6; of aggressive-instcombine, simplifycfg, and instcombine.
7; https://bugs.llvm.org/show_bug.cgi?id=34924
8
9define i32 @rotl(i32 %a, i32 %b) {
10; CHECK-LABEL: @rotl(
11; CHECK-NEXT:  entry:
12; CHECK-NEXT:    [[COND:%.*]] = tail call i32 @llvm.fshl.i32(i32 [[A:%.*]], i32 [[A]], i32 [[B:%.*]])
13; CHECK-NEXT:    ret i32 [[COND]]
14;
15entry:
16  %cmp = icmp eq i32 %b, 0
17  br i1 %cmp, label %end, label %rotbb
18
19rotbb:
20  %sub = sub i32 32, %b
21  %shr = lshr i32 %a, %sub
22  %shl = shl i32 %a, %b
23  %or = or i32 %shr, %shl
24  br label %end
25
26end:
27  %cond = phi i32 [ %or, %rotbb ], [ %a, %entry ]
28  ret i32 %cond
29}
30