101 lines · plain
1;2; There should be just a single copy of loop when strictest mutiplier candidates3; formula (unscaled candidates == 0) is enforced:4;5; RUN: opt < %s -enable-unswitch-cost-multiplier=true \6; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \7; RUN: -passes='loop(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP18;9; RUN: opt < %s -enable-unswitch-cost-multiplier=true \10; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=8 \11; RUN: -passes='loop(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP112;13; RUN: opt < %s -enable-unswitch-cost-multiplier=true \14; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \15; RUN: -passes='loop-mssa(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP116;17; RUN: opt < %s -enable-unswitch-cost-multiplier=true \18; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=8 \19; RUN: -passes='loop-mssa(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP120;21; With relaxed candidates multiplier (unscaled candidates == 8) we should allow22; some unswitches to happen until siblings multiplier starts kicking in:23; With relaxed candidates multiplier (unscaled candidates == 8) we should allow24; some unswitches to happen until siblings multiplier starts kicking in:25;26; RUN: opt < %s -enable-unswitch-cost-multiplier=true \27; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=1 \28; RUN: -passes='loop(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP529;30; RUN: opt < %s -enable-unswitch-cost-multiplier=true \31; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=1 \32; RUN: -passes='loop-mssa(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP533;34; With relaxed candidates multiplier (unscaled candidates == 8) and with relaxed35; siblings multiplier for top-level loops (toplevel-div == 8) we should get36; 2^(num conds) == 2^5 == 3237; copies of the loop:38;39; RUN: opt < %s -enable-unswitch-cost-multiplier=true \40; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=8 \41; RUN: -passes='loop(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP3242;43; RUN: opt < %s -enable-unswitch-cost-multiplier=true \44; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=8 \45; RUN: -passes='loop-mssa(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP3246;47; Similarly get48; 2^(num conds) == 2^5 == 3249; copies of the loop when cost multiplier is disabled:50;51; RUN: opt < %s -enable-unswitch-cost-multiplier=false \52; RUN: -passes='loop(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP3253;54; RUN: opt < %s -enable-unswitch-cost-multiplier=false \55; RUN: -passes='loop-mssa(simple-loop-unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP3256;57; Single loop, not unswitched58; LOOP1: Loop at depth 1 containing:59; LOOP1-NOT: Loop at depth 1 containing:60 61; 5 loops, unswitched 4 times62; LOOP5-COUNT-5: Loop at depth 1 containing:63; LOOP5-NOT: Loop at depth 1 containing:64 65; 32 loops, fully unswitched66; LOOP32-COUNT-32: Loop at depth 1 containing:67; LOOP32-NOT: Loop at depth 1 containing:68 69define void @loop_simple5(ptr %addr, i1 %c1, i1 %c2, i1 %c3, i1 %c4, i1 %c5) {70entry:71 br label %loop72loop:73 %iv = phi i32 [0, %entry], [%iv.next, %loop_latch]74 %iv.next = add i32 %iv, 175 br i1 %c1, label %loop_next1, label %loop_next1_right76loop_next1_right:77 br label %loop_next178loop_next1:79 br i1 %c2, label %loop_next2, label %loop_next2_right80loop_next2_right:81 br label %loop_next282loop_next2:83 br i1 %c3, label %loop_next3, label %loop_next3_right84loop_next3_right:85 br label %loop_next386loop_next3:87 br i1 %c4, label %loop_next4, label %loop_next4_right88loop_next4_right:89 br label %loop_next490loop_next4:91 br i1 %c5, label %loop_latch, label %loop_latch_right92loop_latch_right:93 br label %loop_latch94loop_latch:95 store volatile i32 0, ptr %addr96 %test_loop = icmp slt i32 %iv, 5097 br i1 %test_loop, label %loop, label %exit98exit:99 ret void100}101