1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
2 ; RUN: opt -S '-passes=separate-const-offset-from-gep<lower-gep>' < %s | FileCheck %s
4 ; These tests check that this pass does not incorrectly handle negative offsets.
6 @c = internal constant [4 x i32] [i32 0, i32 1, i32 2, i32 3]
8 ; FIXME: We could optimize this case, but we don't currently. This test just
9 ; checks that we don't miscompile it.
10 define i32 @sub_positive(i32 %a, i32 %b, ptr %ptr) {
11 ; CHECK-LABEL: define i32 @sub_positive
12 ; CHECK-SAME: (i32 [[A:%.*]], i32 [[B:%.*]], ptr [[PTR:%.*]]) {
14 ; CHECK-NEXT: [[TMP0:%.*]] = sub nuw nsw i32 15, [[A]]
15 ; CHECK-NEXT: [[TMP1:%.*]] = sub nuw nsw i32 [[B]], [[TMP0]]
16 ; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[TMP1]] to i64
17 ; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [4 x i32], ptr [[PTR]], i64 0, i64 [[TMP2]]
18 ; CHECK-NEXT: [[TMP4:%.*]] = load i32, ptr [[TMP3]], align 4
19 ; CHECK-NEXT: ret i32 [[TMP4]]
22 %0 = sub nuw nsw i32 15, %a
23 %1 = sub nuw nsw i32 %b, %0
24 %2 = zext i32 %1 to i64
25 %3 = getelementptr inbounds [4 x i32], ptr %ptr, i64 0, i64 %2