3a57152d85
getExpr is missing a check to make sure the result is invertible. This can lead to incorrect results, so return nullptr in those cases like in other places in IVUsers. Fixes #62660. Reviewed By: qcolombet Differential Revision: https://reviews.llvm.org/D153202
42 lines
1.5 KiB
LLVM
42 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
|
|
; RUN: opt -loop-reduce -verify-scev -S %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-apple-macos"
|
|
|
|
define i64 @test_pr62660() {
|
|
; CHECK-LABEL: define i64 @test_pr62660() {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[LSR_IV:%.*]] = phi i64 [ [[LSR_IV_NEXT:%.*]], [[LOOP]] ], [ -1, [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
|
|
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[LSR_IV]], 1
|
|
; CHECK-NEXT: [[TMP:%.*]] = trunc i64 [[TMP0]] to i32
|
|
; CHECK-NEXT: [[CONV1:%.*]] = and i32 [[TMP]], 65535
|
|
; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[IV]], -1
|
|
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[ADD]], [[CONV1]]
|
|
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
|
|
; CHECK-NEXT: [[LSR_IV_NEXT]] = add nsw i64 [[LSR_IV]], 1
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[SUB]], 8
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP]], label [[EXIT:%.*]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: ret i64 [[LSR_IV_NEXT]]
|
|
;
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
|
|
%conv1 = and i32 %iv, 65535
|
|
%add = add nsw i32 %iv, -1
|
|
%sub = add i32 %add, %conv1
|
|
%cmp = icmp sgt i32 %sub, 8
|
|
%iv.next = add nuw nsw i32 %iv, 1
|
|
br i1 %cmp, label %loop, label %exit
|
|
|
|
exit:
|
|
%conv5 = zext i32 %iv to i64
|
|
ret i64 %conv5
|
|
}
|