47 lines
1.4 KiB
LLVM
47 lines
1.4 KiB
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||
|
|
; RUN: opt -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, i32* @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, i32* @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
|
||
|
|
}
|