forked from OSchip/llvm-project
46 lines
1.6 KiB
LLVM
46 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -S -loop-flatten -verify-loop-info -verify-dom-info -verify-scev -verify | FileCheck %s
|
|
|
|
; Testcase of PR49571
|
|
; Previously we had an assertion that the incoming value from the
|
|
; loop latch (%inc) is the same as the operator in the compare
|
|
; statement (%0). This does not necessarily hold as demonstrated
|
|
; in the following case.
|
|
|
|
define dso_local void @main() {
|
|
; CHECK-LABEL: @main(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
|
|
; CHECK: for.body:
|
|
; CHECK-NEXT: [[A_03:%.*]] = phi i32 [ 0, [[FOR_COND]] ], [ [[INC:%.*]], [[FOR_INC:%.*]] ]
|
|
; CHECK-NEXT: br label [[FOR_INC]]
|
|
; CHECK: for.inc:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[A_03]], 1
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[TMP0]], 10
|
|
; CHECK-NEXT: [[INC]] = add nsw i32 [[A_03]], 1
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END:%.*]]
|
|
; CHECK: for.end:
|
|
; CHECK-NEXT: br label [[FOR_COND]]
|
|
;
|
|
entry:
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.end, %entry
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.inc, %for.cond
|
|
%a.03 = phi i32 [ 0, %for.cond ], [ %inc, %for.inc ]
|
|
br label %for.inc
|
|
|
|
for.inc: ; preds = %for.body
|
|
%0 = add i32 %a.03, 1
|
|
%cmp = icmp slt i32 %0, 10
|
|
%inc = add nsw i32 %a.03, 1
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.end: ; preds = %for.inc
|
|
br label %for.cond
|
|
}
|