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