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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes='lowerswitch,unify-loop-exits' -S | FileCheck %s
define void @loop_1(i1 %PredEntry, i1 %PredB, i1 %PredC, i1 %PredD) {
; CHECK-LABEL: @loop_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[PREDENTRY:%.*]], label [[A:%.*]], label [[G:%.*]]
; CHECK: A:
; CHECK-NEXT: br label [[B:%.*]]
; CHECK: B:
; CHECK-NEXT: br i1 [[PREDB:%.*]], label [[C:%.*]], label [[LOOP_EXIT_GUARD:%.*]]
; CHECK: C:
; CHECK-NEXT: br i1 [[PREDC:%.*]], label [[D:%.*]], label [[LOOP_EXIT_GUARD]]
; CHECK: D:
; CHECK-NEXT: br i1 [[PREDD:%.*]], label [[A]], label [[LOOP_EXIT_GUARD]]
; CHECK: E:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: F:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: G:
; CHECK-NEXT: br label [[F:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: loop.exit.guard:
; CHECK-NEXT: [[GUARD_E:%.*]] = phi i1 [ true, [[B]] ], [ false, [[C]] ], [ false, [[D]] ]
; CHECK-NEXT: br i1 [[GUARD_E]], label [[E:%.*]], label [[F]]
;
entry:
br i1 %PredEntry, label %A, label %G
A:
br label %B
B:
br i1 %PredB, label %C, label %E
C:
br i1 %PredC, label %D, label %F
D:
br i1 %PredD, label %A, label %F
E:
br label %exit
F:
br label %exit
G:
br label %F
exit:
ret void
}
define void @loop_2(i1 %PredA, i1 %PredB, i1 %PredC) {
; CHECK-LABEL: @loop_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[A:%.*]]
; CHECK: A:
; CHECK-NEXT: br i1 [[PREDA:%.*]], label [[B:%.*]], label [[LOOP_EXIT_GUARD:%.*]]
; CHECK: B:
; CHECK-NEXT: br i1 [[PREDB:%.*]], label [[C:%.*]], label [[LOOP_EXIT_GUARD]]
; CHECK: C:
; CHECK-NEXT: br i1 [[PREDC:%.*]], label [[D:%.*]], label [[LOOP_EXIT_GUARD]]
; CHECK: D:
; CHECK-NEXT: br label [[A]]
; CHECK: X:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: Y:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: Z:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: loop.exit.guard:
; CHECK-NEXT: [[GUARD_X:%.*]] = phi i1 [ true, [[A]] ], [ false, [[B]] ], [ false, [[C]] ]
; CHECK-NEXT: [[GUARD_Y:%.*]] = phi i1 [ false, [[A]] ], [ true, [[B]] ], [ false, [[C]] ]
; CHECK-NEXT: br i1 [[GUARD_X]], label [[X:%.*]], label [[LOOP_EXIT_GUARD1:%.*]]
; CHECK: loop.exit.guard1:
; CHECK-NEXT: br i1 [[GUARD_Y]], label [[Y:%.*]], label [[Z:%.*]]
;
entry:
br label %A
A:
br i1 %PredA, label %B, label %X
B:
br i1 %PredB, label %C, label %Y
C:
br i1 %PredC, label %D, label %Z
D:
br label %A
X:
br label %exit
Y:
br label %exit
Z:
br label %exit
exit:
ret void
}
|
