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llvm-mirror/test/Transforms/LoopUnswitch/2011-11-18-TwoSwitches.ll

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Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 06:52:47 +02:00
; REQUIRES: asserts
[NewPM][LoopUnswitch] Pin loop-unswitch to legacy PM or use simple-loop-unswitch As mentioned in http://lists.llvm.org/pipermail/llvm-dev/2020-July/143395.html, loop-unswitch has not been ported to the NPM. Instead people are using simple-loop-unswitch. Pin all tests in Transforms/LoopUnswitch to legacy PM and replace all other uses of loop-unswitch with simple-loop-unswitch. One test that didn't fit into the above was 2014-06-21-congruent-constant.ll which seems to only pass with loop-unswitch. That is also pinned to legacy PM. Now all tests containing "-loop-unswitch" anywhere in the test succeed with NPM turned on by default. Reviewed By: ychen Differential Revision: https://reviews.llvm.org/D85360
2020-08-05 22:49:00 +02:00
; RUN: opt -loop-unswitch -enable-new-pm=0 -loop-unswitch-threshold 1000 -disable-output -stats -info-output-file - < %s | FileCheck --check-prefix=STATS %s
; RUN: opt -S -loop-unswitch -enable-new-pm=0 -loop-unswitch-threshold 1000 -verify-loop-info -verify-dom-info < %s | FileCheck %s
; RUN: opt -S -loop-unswitch -enable-new-pm=0 -loop-unswitch-threshold 1000 -verify-loop-info -verify-dom-info -enable-mssa-loop-dependency=true -verify-memoryssa < %s | FileCheck %s
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 06:52:47 +02:00
; STATS: 3 loop-unswitch - Number of switches unswitched
; CHECK: %1 = icmp eq i32 %c, 1
; CHECK-NEXT: br i1 %1, label %.split.us, label %..split_crit_edge
; CHECK: ..split_crit_edge: ; preds = %0
; CHECK-NEXT: br label %.split
; CHECK: .split.us: ; preds = %0
; CHECK-NEXT: %2 = icmp eq i32 %d, 1
; CHECK-NEXT: br i1 %2, label %.split.us.split.us, label %.split.us..split.us.split_crit_edge
; CHECK: .split.us..split.us.split_crit_edge: ; preds = %.split.us
; CHECK-NEXT: br label %.split.us.split
; CHECK: .split.us.split.us: ; preds = %.split.us
; CHECK-NEXT: br label %loop_begin.us.us
; CHECK: loop_begin.us.us: ; preds = %loop_begin.backedge.us.us, %.split.us.split.us
; CHECK-NEXT: %var_val.us.us = load i32, i32* %var
; CHECK-NEXT: switch i32 1, label %second_switch.us.us [
; CHECK-NEXT: i32 1, label %inc.us.us
; CHECK: second_switch.us.us: ; preds = %loop_begin.us.us
; CHECK-NEXT: switch i32 1, label %default.us.us [
; CHECK-NEXT: i32 1, label %inc.us.us
; CHECK: inc.us.us: ; preds = %second_switch.us.us, %loop_begin.us.us
; CHECK-NEXT: call void @incf() [[NOR_NUW:#[0-9]+]]
; CHECK-NEXT: br label %loop_begin.backedge.us.us
; CHECK: .split.us.split: ; preds = %.split.us..split.us.split_crit_edge
; CHECK-NEXT: br label %loop_begin.us
; CHECK: loop_begin.us: ; preds = %loop_begin.backedge.us, %.split.us.split
; CHECK-NEXT: %var_val.us = load i32, i32* %var
; CHECK-NEXT: switch i32 1, label %second_switch.us [
; CHECK-NEXT: i32 1, label %inc.us
; CHECK: second_switch.us: ; preds = %loop_begin.us
; CHECK-NEXT: switch i32 %d, label %default.us [
; CHECK-NEXT: i32 1, label %second_switch.us.inc.us_crit_edge
; CHECK-NEXT: ]
; CHECK: second_switch.us.inc.us_crit_edge: ; preds = %second_switch.us
; CHECK-NEXT: br i1 true, label %us-unreachable8, label %inc.us
; CHECK: inc.us: ; preds = %second_switch.us.inc.us_crit_edge, %loop_begin.us
; CHECK-NEXT: call void @incf() [[NOR_NUW]]
; CHECK-NEXT: br label %loop_begin.backedge.us
; CHECK: .split: ; preds = %..split_crit_edge
; CHECK-NEXT: %3 = icmp eq i32 %d, 1
; CHECK-NEXT: br i1 %3, label %.split.split.us, label %.split..split.split_crit_edge
; CHECK: .split..split.split_crit_edge: ; preds = %.split
; CHECK-NEXT: br label %.split.split
; CHECK: .split.split.us: ; preds = %.split
; CHECK-NEXT: br label %loop_begin.us1
; CHECK: loop_begin.us1: ; preds = %loop_begin.backedge.us6, %.split.split.us
; CHECK-NEXT: %var_val.us2 = load i32, i32* %var
; CHECK-NEXT: switch i32 %c, label %second_switch.us3 [
; CHECK-NEXT: i32 1, label %loop_begin.inc_crit_edge.us
; CHECK-NEXT: ]
; CHECK: second_switch.us3: ; preds = %loop_begin.us1
; CHECK-NEXT: switch i32 1, label %default.us5 [
; CHECK-NEXT: i32 1, label %inc.us4
; CHECK-NEXT: ]
; CHECK: inc.us4: ; preds = %loop_begin.inc_crit_edge.us, %second_switch.us3
; CHECK-NEXT: call void @incf() [[NOR_NUW]]
; CHECK-NEXT: br label %loop_begin.backedge.us6
; CHECK: loop_begin.inc_crit_edge.us: ; preds = %loop_begin.us1
; CHECK-NEXT: br i1 true, label %us-unreachable.us-lcssa.us, label %inc.us4
; CHECK: .split.split: ; preds = %.split..split.split_crit_edge
; CHECK-NEXT: br label %loop_begin
; CHECK: loop_begin: ; preds = %loop_begin.backedge, %.split.split
; CHECK-NEXT: %var_val = load i32, i32* %var
; CHECK-NEXT: switch i32 %c, label %second_switch [
; CHECK-NEXT: i32 1, label %loop_begin.inc_crit_edge
; CHECK-NEXT: ]
; CHECK: loop_begin.inc_crit_edge: ; preds = %loop_begin
; CHECK-NEXT: br i1 true, label %us-unreachable.us-lcssa, label %inc
; CHECK: second_switch: ; preds = %loop_begin
; CHECK-NEXT: switch i32 %d, label %default [
; CHECK-NEXT: i32 1, label %second_switch.inc_crit_edge
; CHECK-NEXT: ]
; CHECK: second_switch.inc_crit_edge: ; preds = %second_switch
; CHECK-NEXT: br i1 true, label %us-unreachable7, label %inc
define i32 @test(i32* %var) {
%mem = alloca i32
store i32 2, i32* %mem
%c = load i32, i32* %mem
%d = load i32, i32* %mem
br label %loop_begin
loop_begin:
%var_val = load i32, i32* %var
switch i32 %c, label %second_switch [
i32 1, label %inc
]
second_switch:
switch i32 %d, label %default [
i32 1, label %inc
]
inc:
call void @incf() noreturn nounwind
br label %loop_begin
default:
br label %loop_begin
loop_exit:
ret i32 0
}
declare void @incf() noreturn
declare void @decf() noreturn
; CHECK: attributes #0 = { noreturn }
; CHECK: attributes [[NOR_NUW]] = { noreturn nounwind }
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