xref: /llvm-project/llvm/test/Transforms/LoopStrengthReduce/X86/lsr-overflow.ll (revision cee313d288a4faf0355d76fb6e0e927e211d08a5)
1*cee313d2SEric Christopher; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2*cee313d2SEric Christopher; RUN: opt -lsr-complexity-limit=50 -loop-reduce -S %s | FileCheck %s
3*cee313d2SEric Christopher
4*cee313d2SEric Christophertarget triple = "x86_64-apple-macosx10.14.0"
5*cee313d2SEric Christophertarget datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
6*cee313d2SEric Christopher
7*cee313d2SEric Christopherdefine void @overflow1(i64 %a) {
8*cee313d2SEric Christopher; CHECK-LABEL: @overflow1(
9*cee313d2SEric Christopher; CHECK-NEXT:  bb:
10*cee313d2SEric Christopher; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[A:%.*]], -1
11*cee313d2SEric Christopher; CHECK-NEXT:    br label [[BB1:%.*]]
12*cee313d2SEric Christopher; CHECK:       bb1:
13*cee313d2SEric Christopher; CHECK-NEXT:    [[LSR_IV:%.*]] = phi i64 [ [[LSR_IV_NEXT:%.*]], [[BB1]] ], [ [[TMP0]], [[BB:%.*]] ]
14*cee313d2SEric Christopher; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[LSR_IV]], -9223372036854775808
15*cee313d2SEric Christopher; CHECK-NEXT:    [[TMP4:%.*]] = icmp ne i64 [[TMP1]], -1
16*cee313d2SEric Christopher; CHECK-NEXT:    [[TMP5:%.*]] = and i1 [[TMP4]], true
17*cee313d2SEric Christopher; CHECK-NEXT:    [[LSR_IV_NEXT]] = add i64 [[LSR_IV]], 1
18*cee313d2SEric Christopher; CHECK-NEXT:    br i1 [[TMP5]], label [[BB1]], label [[BB7:%.*]]
19*cee313d2SEric Christopher; CHECK:       bb7:
20*cee313d2SEric Christopher; CHECK-NEXT:    [[TMP9:%.*]] = and i64 [[LSR_IV_NEXT]], 1
21*cee313d2SEric Christopher; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i64 [[TMP9]], 0
22*cee313d2SEric Christopher; CHECK-NEXT:    unreachable
23*cee313d2SEric Christopher;
24*cee313d2SEric Christopherbb:
25*cee313d2SEric Christopher  br label %bb1
26*cee313d2SEric Christopher
27*cee313d2SEric Christopherbb1:                                              ; preds = %bb1, %bb
28*cee313d2SEric Christopher  %tmp = phi i64 [ %a, %bb ], [ %tmp6, %bb1 ]
29*cee313d2SEric Christopher  %tmp4 = icmp ne i64 %tmp, -9223372036854775808
30*cee313d2SEric Christopher  %tmp5 = and i1 %tmp4, 1
31*cee313d2SEric Christopher  %tmp6 = add i64 %tmp, 1
32*cee313d2SEric Christopher  br i1 %tmp5, label %bb1, label %bb7
33*cee313d2SEric Christopher
34*cee313d2SEric Christopherbb7:                                              ; preds = %bb1
35*cee313d2SEric Christopher  %tmp9 = and i64 %tmp, 1
36*cee313d2SEric Christopher  %tmp10 = icmp eq i64 %tmp9, 0
37*cee313d2SEric Christopher  unreachable
38*cee313d2SEric Christopher}
39