160 lines
6.2 KiB
LLVM
160 lines
6.2 KiB
LLVM
;
|
|
; There should be just a single copy of each loop when strictest mutiplier
|
|
; candidates formula (unscaled candidates == 0) is enforced:
|
|
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \
|
|
; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=16 \
|
|
; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=1 \
|
|
; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=0 -unswitch-siblings-toplevel-div=16 \
|
|
; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | FileCheck %s --check-prefixes=LOOP1
|
|
;
|
|
; When we relax the candidates part of a multiplier formula
|
|
; (unscaled candidates == 4) we start getting some unswitches,
|
|
; which leads to siblings multiplier kicking in.
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=4 -unswitch-siblings-toplevel-div=1 \
|
|
; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | \
|
|
; RUN: sort -b -k 1 | FileCheck %s --check-prefixes=LOOP-UNSCALE4-DIV1
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=4 -unswitch-siblings-toplevel-div=1 \
|
|
; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | \
|
|
; RUN: sort -b -k 1 | FileCheck %s --check-prefixes=LOOP-UNSCALE4-DIV1
|
|
;
|
|
; NB: sort -b is essential here and below, otherwise blanks might lead to different
|
|
; order depending on locale.
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=4 -unswitch-siblings-toplevel-div=2 \
|
|
; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | \
|
|
; RUN: sort -b -k 1 | FileCheck %s --check-prefixes=LOOP-UNSCALE4-DIV2
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=true \
|
|
; RUN: -unswitch-num-initial-unscaled-candidates=4 -unswitch-siblings-toplevel-div=2 \
|
|
; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | \
|
|
; RUN: sort -b -k 1 | FileCheck %s --check-prefixes=LOOP-UNSCALE4-DIV2
|
|
;
|
|
; Get
|
|
; 2^(num conds) == 2^5 = 32
|
|
; loop nests when cost multiplier is disabled:
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=false \
|
|
; RUN: -passes='loop(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | \
|
|
; RUN: sort -b -k 1 | FileCheck %s --check-prefixes=LOOP32
|
|
;
|
|
; RUN: opt < %s -enable-unswitch-cost-multiplier=false \
|
|
; RUN: -passes='loop-mssa(unswitch<nontrivial>),print<loops>' -disable-output 2>&1 | \
|
|
; RUN: sort -b -k 1 | FileCheck %s --check-prefixes=LOOP32
|
|
;
|
|
; Single loop nest, not unswitched
|
|
; LOOP1: Loop at depth 1 containing:
|
|
; LOOP1: Loop at depth 2 containing:
|
|
; LOOP1: Loop at depth 3 containing:
|
|
; LOOP1-NOT: Loop at depth {{[0-9]+}} containing:
|
|
;
|
|
; Half unswitched loop nests, with unscaled4 and div1 it gets less depth1 loops unswitched
|
|
; since they have more cost.
|
|
; LOOP-UNSCALE4-DIV1-COUNT-6: Loop at depth 1 containing:
|
|
; LOOP-UNSCALE4-DIV1-COUNT-19: Loop at depth 2 containing:
|
|
; LOOP-UNSCALE4-DIV1-COUNT-29: Loop at depth 3 containing:
|
|
; LOOP-UNSCALE4-DIV1-NOT: Loop at depth {{[0-9]+}} containing:
|
|
;
|
|
; Half unswitched loop nests, with unscaled4 and div2 it gets more depth1 loops unswitched
|
|
; as div2 kicks in.
|
|
; LOOP-UNSCALE4-DIV2-COUNT-11: Loop at depth 1 containing:
|
|
; LOOP-UNSCALE4-DIV2-COUNT-22: Loop at depth 2 containing:
|
|
; LOOP-UNSCALE4-DIV2-COUNT-29: Loop at depth 3 containing:
|
|
; LOOP-UNSCALE4-DIV2-NOT: Loop at depth {{[0-9]+}} containing:
|
|
;
|
|
; 32 loop nests, fully unswitched
|
|
; LOOP32-COUNT-32: Loop at depth 1 containing:
|
|
; LOOP32-COUNT-32: Loop at depth 2 containing:
|
|
; LOOP32-COUNT-32: Loop at depth 3 containing:
|
|
; LOOP32-NOT: Loop at depth {{[0-9]+}} containing:
|
|
|
|
declare void @bar()
|
|
|
|
define void @loop_nested3_conds5(i32* %addr, i1 %c1, i1 %c2, i1 %c3, i1 %c4, i1 %c5) {
|
|
entry:
|
|
%addr1 = getelementptr i32, i32* %addr, i64 0
|
|
%addr2 = getelementptr i32, i32* %addr, i64 1
|
|
%addr3 = getelementptr i32, i32* %addr, i64 2
|
|
br label %outer
|
|
outer:
|
|
%iv1 = phi i32 [0, %entry], [%iv1.next, %outer_latch]
|
|
%iv1.next = add i32 %iv1, 1
|
|
;; skip nontrivial unswitch
|
|
call void @bar()
|
|
br label %middle
|
|
middle:
|
|
%iv2 = phi i32 [0, %outer], [%iv2.next, %middle_latch]
|
|
%iv2.next = add i32 %iv2, 1
|
|
;; skip nontrivial unswitch
|
|
call void @bar()
|
|
br label %loop
|
|
loop:
|
|
%iv3 = phi i32 [0, %middle], [%iv3.next, %loop_latch]
|
|
%iv3.next = add i32 %iv3, 1
|
|
;; skip nontrivial unswitch
|
|
call void @bar()
|
|
br i1 %c1, label %loop_next1_left, label %loop_next1_right
|
|
loop_next1_left:
|
|
br label %loop_next1
|
|
loop_next1_right:
|
|
br label %loop_next1
|
|
|
|
loop_next1:
|
|
br i1 %c2, label %loop_next2_left, label %loop_next2_right
|
|
loop_next2_left:
|
|
br label %loop_next2
|
|
loop_next2_right:
|
|
br label %loop_next2
|
|
|
|
loop_next2:
|
|
br i1 %c3, label %loop_next3_left, label %loop_next3_right
|
|
loop_next3_left:
|
|
br label %loop_next3
|
|
loop_next3_right:
|
|
br label %loop_next3
|
|
|
|
loop_next3:
|
|
br i1 %c4, label %loop_next4_left, label %loop_next4_right
|
|
loop_next4_left:
|
|
br label %loop_next4
|
|
loop_next4_right:
|
|
br label %loop_next4
|
|
|
|
loop_next4:
|
|
br i1 %c5, label %loop_latch_left, label %loop_latch_right
|
|
loop_latch_left:
|
|
br label %loop_latch
|
|
loop_latch_right:
|
|
br label %loop_latch
|
|
|
|
loop_latch:
|
|
store volatile i32 0, i32* %addr1
|
|
%test_loop = icmp slt i32 %iv3, 50
|
|
br i1 %test_loop, label %loop, label %middle_latch
|
|
middle_latch:
|
|
store volatile i32 0, i32* %addr2
|
|
%test_middle = icmp slt i32 %iv2, 50
|
|
br i1 %test_middle, label %middle, label %outer_latch
|
|
outer_latch:
|
|
store volatile i32 0, i32* %addr3
|
|
%test_outer = icmp slt i32 %iv1, 50
|
|
br i1 %test_outer, label %outer, label %exit
|
|
exit:
|
|
ret void
|
|
}
|