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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=indvars -S < %s | FileCheck %s
; indvars should transform the phi node pair from the for-loop
@c = common global i32 0, align 4
define i32 @main() #0 {
; CHECK-LABEL: @main(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @c, align 4
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[TMP0]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label [[FOR_BODY_PREHEADER:%.*]], label [[EXIT:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: br label [[FOR_INC:%.*]]
; CHECK: for.inc:
; CHECK-NEXT: br i1 false, label [[FOR_BODY]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK: exit.loopexit:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RET:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 0, [[EXIT_LOOPEXIT]] ]
; CHECK-NEXT: ret i32 [[RET]]
;
entry:
%0 = load i32, ptr @c, align 4
%tobool = icmp eq i32 %0, 0
br i1 %tobool, label %for.body, label %exit
for.body:
%inc2 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%sub = add i32 %inc2, -1
%cmp1 = icmp uge i32 %sub, %inc2
%conv = zext i1 %cmp1 to i32
br label %for.inc
for.inc:
%inc = add nsw i32 %inc2, 1
%cmp = icmp slt i32 %inc, 5
br i1 %cmp, label %for.body, label %exit
exit:
%ret = phi i32 [ 0, %entry ], [ %conv, %for.inc ]
ret i32 %ret
}
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