; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=indvars -S < %s | FileCheck %s
declare i1 @cond()
define void @test_01(i32 %x) {
; CHECK-LABEL: @test_01(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 true, label [[LOOP_1_PREHEADER:%.*]], label [[LOOP_2_PREHEADER:%.*]]
; CHECK: loop.2.preheader:
; CHECK-NEXT: br label [[LOOP_2:%.*]]
; CHECK: loop.1.preheader:
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: [[IV_1:%.*]] = phi i32 [ [[IV_NEXT_1:%.*]], [[GUARDED_1:%.*]] ], [ 0, [[LOOP_1_PREHEADER]] ]
; CHECK-NEXT: [[CHECK_1:%.*]] = icmp slt i32 [[IV_1]], [[X:%.*]]
; CHECK-NEXT: br i1 [[CHECK_1]], label [[GUARDED_1]], label [[FAIL_LOOPEXIT:%.*]]
; CHECK: guarded.1:
; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i32 [[IV_1]], 1
; CHECK-NEXT: [[LOOP_COND_1:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_1]], label [[LOOP_1]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: loop.2:
; CHECK-NEXT: br i1 true, label [[GUARDED_2:%.*]], label [[FAIL_LOOPEXIT1:%.*]]
; CHECK: guarded.2:
; CHECK-NEXT: [[LOOP_COND_2:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_2]], label [[LOOP_2]], label [[EXIT_LOOPEXIT2:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit.loopexit2:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: fail.loopexit:
; CHECK-NEXT: br label [[FAIL:%.*]]
; CHECK: fail.loopexit1:
; CHECK-NEXT: br label [[FAIL]]
; CHECK: fail:
; CHECK-NEXT: unreachable
;
entry:
br i1 true, label %loop.1, label %loop.2
loop.1:
%iv.1 = phi i32 [0, %entry], [%iv.next.1, %guarded.1]
%check.1 = icmp slt i32 %iv.1, %x
br i1 %check.1, label %guarded.1, label %fail
guarded.1:
%iv.next.1 = add i32 %iv.1, 1
%loop.cond.1 = call i1 @cond()
br i1 %loop.cond.1, label %loop.1, label %exit
loop.2:
%iv.2 = phi i32 [0, %entry], [%iv.next.2, %guarded.2]
%check.2 = icmp slt i32 %iv.2, %x
br i1 %check.2, label %guarded.2, label %fail
guarded.2:
%iv.next.2 = add i32 %iv.2, 1
%loop.cond.2 = call i1 @cond()
br i1 %loop.cond.2, label %loop.2, label %exit
exit:
ret void
fail:
unreachable
}
define void @test_02(i32 %x) {
; CHECK-LABEL: @test_02(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[LOOP_1_PREHEADER:%.*]], label [[LOOP_2_PREHEADER:%.*]]
; CHECK: loop.2.preheader:
; CHECK-NEXT: br label [[LOOP_2:%.*]]
; CHECK: loop.1.preheader:
; CHECK-NEXT: br label [[LOOP_1:%.*]]
; CHECK: loop.1:
; CHECK-NEXT: br i1 true, label [[GUARDED_1:%.*]], label [[FAIL_LOOPEXIT:%.*]]
; CHECK: guarded.1:
; CHECK-NEXT: [[LOOP_COND_1:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_1]], label [[LOOP_1]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: loop.2:
; CHECK-NEXT: [[IV_2:%.*]] = phi i32 [ [[IV_NEXT_2:%.*]], [[GUARDED_2:%.*]] ], [ 0, [[LOOP_2_PREHEADER]] ]
; CHECK-NEXT: [[CHECK_2:%.*]] = icmp slt i32 [[IV_2]], [[X:%.*]]
; CHECK-NEXT: br i1 [[CHECK_2]], label [[GUARDED_2]], label [[FAIL_LOOPEXIT1:%.*]]
; CHECK: guarded.2:
; CHECK-NEXT: [[IV_NEXT_2]] = add nuw nsw i32 [[IV_2]], 1
; CHECK-NEXT: [[LOOP_COND_2:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[LOOP_COND_2]], label [[LOOP_2]], label [[EXIT_LOOPEXIT2:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: exit.loopexit2:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
; CHECK: fail.loopexit:
; CHECK-NEXT: br label [[FAIL:%.*]]
; CHECK: fail.loopexit1:
; CHECK-NEXT: br label [[FAIL]]
; CHECK: fail:
; CHECK-NEXT: unreachable
;
entry:
br i1 false, label %loop.1, label %loop.2
loop.1:
%iv.1 = phi i32 [0, %entry], [%iv.next.1, %guarded.1]
%check.1 = icmp slt i32 %iv.1, %x
br i1 %check.1, label %guarded.1, label %fail
guarded.1:
%iv.next.1 = add i32 %iv.1, 1
%loop.cond.1 = call i1 @cond()
br i1 %loop.cond.1, label %loop.1, label %exit
loop.2:
%iv.2 = phi i32 [0, %entry], [%iv.next.2, %guarded.2]
%check.2 = icmp slt i32 %iv.2, %x
br i1 %check.2, label %guarded.2, label %fail
guarded.2:
%iv.next.2 = add i32 %iv.2, 1
%loop.cond.2 = call i1 @cond()
br i1 %loop.cond.2, label %loop.2, label %exit
exit:
ret void
fail:
unreachable
}
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