101 lines
4.4 KiB
LLVM
101 lines
4.4 KiB
LLVM
;
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; There should be just a single copy of loop when strictest mutiplier candidates
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; formula (unscaled candidates == 0) is enforced:
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \
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; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=8 \
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; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \
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; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=8 \
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; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
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;
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; With relaxed candidates multiplier (unscaled candidates == 8) we should allow
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; some unswitches to happen until siblings multiplier starts kicking in:
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; With relaxed candidates multiplier (unscaled candidates == 8) we should allow
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; some unswitches to happen until siblings multiplier starts kicking in:
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=1 \
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; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP5
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=1 \
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; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP5
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;
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; With relaxed candidates multiplier (unscaled candidates == 8) and with relaxed
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; siblings multiplier for top-level loops (toplevel-div == 8) we should get
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; 2^(num conds) == 2^5 == 32
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; copies of the loop:
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=8 \
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; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP32
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
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; RUN: -unswitch-num-initial-unscaled-candidates=8 -unswitch-siblings-toplevel-div=8 \
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; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP32
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;
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; Similarly get
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; 2^(num conds) == 2^5 == 32
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; copies of the loop when cost multiplier is disabled:
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=false \
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; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP32
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;
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; RUN: opt < %s -enable-unswitch-cost-multiplier=false \
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; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP32
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;
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; Single loop, not unswitched
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; LOOP1: Loop at depth 1 containing:
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; LOOP1-NOT: Loop at depth 1 containing:
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; 5 loops, unswitched 4 times
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; LOOP5-COUNT-5: Loop at depth 1 containing:
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; LOOP5-NOT: Loop at depth 1 containing:
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; 32 loops, fully unswitched
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; LOOP32-COUNT-32: Loop at depth 1 containing:
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; LOOP32-NOT: Loop at depth 1 containing:
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define void @loop_simple5(i32* %addr, i1 %c1, i1 %c2, i1 %c3, i1 %c4, i1 %c5) {
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entry:
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br label %loop
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loop:
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%iv = phi i32 [0, %entry], [%iv.next, %loop_latch]
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%iv.next = add i32 %iv, 1
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br i1 %c1, label %loop_next1, label %loop_next1_right
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loop_next1_right:
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br label %loop_next1
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loop_next1:
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br i1 %c2, label %loop_next2, label %loop_next2_right
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loop_next2_right:
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br label %loop_next2
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loop_next2:
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br i1 %c3, label %loop_next3, label %loop_next3_right
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loop_next3_right:
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br label %loop_next3
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loop_next3:
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br i1 %c4, label %loop_next4, label %loop_next4_right
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loop_next4_right:
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br label %loop_next4
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loop_next4:
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br i1 %c5, label %loop_latch, label %loop_latch_right
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loop_latch_right:
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br label %loop_latch
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loop_latch:
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store volatile i32 0, i32* %addr
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%test_loop = icmp slt i32 %iv, 50
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br i1 %test_loop, label %loop, label %exit
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exit:
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ret void
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}
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