1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3; 4; Verify that a constant with size in excess of 32-bit SIZE_MAX doesn't 5; cause trouble. This test exercises an internal limit set arbitrarily 6; at 64K for the largest supported zeroinitiazer. If the limit changes 7; the test might need to be adjusted. 8 9declare ptr @memrchr(ptr, i32, i64) 10 11@a = constant <{ i8, [4294967295 x i8] }> <{ i8 1, [4294967295 x i8] zeroinitializer }> 12 13; Verify reading an initializer INT32_MAX + 1 bytes large (starting at 14; offset 2147483647 into a which is UINT32_MAX bytes in size). 15 16define ptr @call_a_pi32max_p1() { 17; CHECK-LABEL: @call_a_pi32max_p1( 18; CHECK-NEXT: [[CHR:%.*]] = tail call ptr @memrchr(ptr noundef nonnull dereferenceable(2147483647) getelementptr inbounds nuw (i8, ptr @a, i64 2147483648), i32 0, i64 2147483647) 19; CHECK-NEXT: ret ptr [[CHR]] 20; 21 %ptr = getelementptr <{ i8, [4294967295 x i8] }>, ptr @a, i32 0, i32 1, i32 2147483647 22 %chr = tail call ptr @memrchr(ptr %ptr, i32 0, i64 2147483647) 23 ret ptr %chr 24} 25 26; Verify reading an initializer INT32_MAX bytes large (starting at offset 27; 2147483648 into a which is UINT32_MAX bytes in size). 28 29define ptr @call_a_pi32max() { 30; CHECK-LABEL: @call_a_pi32max( 31; CHECK-NEXT: [[CHR:%.*]] = tail call ptr @memrchr(ptr noundef nonnull dereferenceable(2147483647) getelementptr inbounds nuw (i8, ptr @a, i64 2147483649), i32 0, i64 2147483647) 32; CHECK-NEXT: ret ptr [[CHR]] 33; 34 %ptr = getelementptr <{ i8, [4294967295 x i8] }>, ptr @a, i32 0, i32 1, i64 2147483648 35 %chr = tail call ptr @memrchr(ptr %ptr, i32 0, i64 2147483647) 36 ret ptr %chr 37} 38 39 40; Verify reading an initializer UINT32_MAX bytes large (starting at offset 41; 1 into a). 42 43define ptr @call_a_pui32max() { 44; CHECK-LABEL: @call_a_pui32max( 45; CHECK-NEXT: [[CHR:%.*]] = tail call ptr @memrchr(ptr noundef nonnull dereferenceable(4294967295) getelementptr inbounds nuw (i8, ptr @a, i64 1), i32 0, i64 4294967295) 46; CHECK-NEXT: ret ptr [[CHR]] 47; 48 %ptr = getelementptr <{ i8, [4294967295 x i8] }>, ptr @a, i32 0, i32 1, i32 0 49 %chr = tail call ptr @memrchr(ptr %ptr, i32 0, i64 4294967295) 50 ret ptr %chr 51} 52 53; Verify reading an initializer UINT32_MAX + 1 bytes large (all of a). 54 55define ptr @call_a_puimax_p1() { 56; CHECK-LABEL: @call_a_puimax_p1( 57; CHECK-NEXT: [[CHR:%.*]] = tail call ptr @memrchr(ptr noundef nonnull dereferenceable(4294967296) @a, i32 0, i64 4294967296) 58; CHECK-NEXT: ret ptr [[CHR]] 59; 60 %ptr = getelementptr <{ i8, [4294967295 x i8] }>, ptr @a, i32 0, i32 0 61 %chr = tail call ptr @memrchr(ptr %ptr, i32 0, i64 4294967296) 62 ret ptr %chr 63} 64