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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=indvars < %s | FileCheck %s
; The %tobool condition should not be optimized away.
define void @test() {
; CHECK-LABEL: define void @test() {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[LOOP:.*]]
; CHECK: [[LOOP]]:
; CHECK-NEXT: [[IV:%.*]] = phi i128 [ 3, %[[ENTRY]] ], [ [[IV_DEC:%.*]], %[[LOOP_LATCH:.*]] ]
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp ne i128 [[IV]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label %[[LOOP_LATCH]], label %[[IF:.*]]
; CHECK: [[IF]]:
; CHECK-NEXT: call void @foo()
; CHECK-NEXT: br label %[[LOOP_LATCH]]
; CHECK: [[LOOP_LATCH]]:
; CHECK-NEXT: [[IV_DEC]] = add nsw i128 [[IV]], -1
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i128 [[IV]], 0
; CHECK-NEXT: br i1 [[CMP]], label %[[LOOP]], label %[[EXIT:.*]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv = phi i128 [ 3, %entry ], [ %iv.dec, %loop.latch ]
%tobool = icmp ne i128 %iv, 0
br i1 %tobool, label %loop.latch, label %if
if:
call void @foo()
br label %loop.latch
loop.latch:
%iv.dec = add nsw i128 %iv, -1
%cmp = icmp sgt i128 %iv, 0
br i1 %cmp, label %loop, label %exit
exit:
ret void
}
declare void @foo()
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