; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 ; RUN: opt < %s -S -passes=instcombine | FileCheck %s declare void @use64(i64) declare void @useptr(ptr) define ptr @test_zero(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_zero( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[BASE]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_nonzero(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_nonzero( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 4 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i64 %a, 2 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_or_disjoint(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_or_disjoint( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[BASE]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = or disjoint i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_zero_multiuse_index(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_zero_multiuse_index( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[INDEX:%.*]] = add i64 [[A]], 1 ; CHECK-NEXT: call void @use64(i64 [[INDEX]]) ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[BASE]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i64 %a, 1 call void @use64(i64 %index) %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_zero_multiuse_ptr(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_zero_multiuse_ptr( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: call void @useptr(ptr [[P1]]) ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[BASE]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 call void @useptr(ptr %p1) %index = add i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_zero_sext_add_nsw(ptr %base, i32 %a) { ; CHECK-LABEL: define ptr @test_zero_sext_add_nsw( ; CHECK-SAME: ptr [[BASE:%.*]], i32 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[A]] to i64 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[BASE]], i64 [[TMP0]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add nsw i32 %a, 1 %p2 = getelementptr i32, ptr %p1, i32 %index ret ptr %p2 } define ptr @test_zero_trunc_add(ptr %base, i128 %a) { ; CHECK-LABEL: define ptr @test_zero_trunc_add( ; CHECK-SAME: ptr [[BASE:%.*]], i128 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = trunc i128 [[A]] to i64 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[BASE]], i64 [[TMP0]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i128 %a, 1 %p2 = getelementptr i32, ptr %p1, i128 %index ret ptr %p2 } define ptr @test_non_i8(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_non_i8( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[A]] ; CHECK-NEXT: ret ptr [[TMP0]] ; entry: %p1 = getelementptr i16, ptr %base, i64 -4 %index = add i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_non_const(ptr %base, i64 %a, i64 %b) { ; CHECK-LABEL: define ptr @test_non_const( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]], i64 [[B:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 [[B]] ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[A]] ; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, ptr [[TMP0]], i64 4 ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 %b %index = add i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_too_many_indices(ptr %base, i64 %a, i64 %b) { ; CHECK-LABEL: define ptr @test_too_many_indices( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]], i64 [[B:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 [[B]] ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[P1]], i64 36 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 %b %index = add i64 %a, 1 %p2 = getelementptr [8 x i32], ptr %p1, i64 1, i64 %index ret ptr %p2 } define ptr @test_wrong_op(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_wrong_op( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: [[INDEX:%.*]] = xor i64 [[A]], 1 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[INDEX]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = xor i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_sext_add_without_nsw(ptr %base, i32 %a) { ; CHECK-LABEL: define ptr @test_sext_add_without_nsw( ; CHECK-SAME: ptr [[BASE:%.*]], i32 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: [[INDEX:%.*]] = add i32 [[A]], 1 ; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[INDEX]] to i64 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[TMP0]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i32 %a, 1 %p2 = getelementptr i32, ptr %p1, i32 %index ret ptr %p2 } define ptr @test_or_without_disjoint(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_or_without_disjoint( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: [[INDEX:%.*]] = or i64 [[A]], 1 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[INDEX]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = or i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_smul_overflow(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_smul_overflow( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -12 ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[A]] ; CHECK-NEXT: ret ptr [[TMP0]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i64 %a, 9223372036854775806 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_sadd_overflow(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_sadd_overflow( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -9223372036854775808 ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[A]] ; CHECK-NEXT: ret ptr [[TMP0]] ; entry: %p1 = getelementptr i8, ptr %base, i64 9223372036854775804 %index = add i64 %a, 1 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_nonzero_multiuse_index(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_nonzero_multiuse_index( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: [[INDEX:%.*]] = add i64 [[A]], 2 ; CHECK-NEXT: call void @use64(i64 [[INDEX]]) ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[INDEX]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i64 %a, 2 call void @use64(i64 %index) %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_nonzero_multiuse_ptr(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_nonzero_multiuse_ptr( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: call void @useptr(ptr [[P1]]) ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr [4 x i8], ptr [[P1]], i64 [[A]] ; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, ptr [[TMP0]], i64 8 ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 call void @useptr(ptr %p1) %index = add i64 %a, 2 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_scalable(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_scalable( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[P1:%.*]] = getelementptr i8, ptr [[BASE]], i64 -4 ; CHECK-NEXT: [[INDEX:%.*]] = add i64 [[A]], 1 ; CHECK-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64() ; CHECK-NEXT: [[TMP1:%.*]] = shl nuw i64 [[TMP0]], 4 ; CHECK-NEXT: [[P2_IDX:%.*]] = mul i64 [[INDEX]], [[TMP1]] ; CHECK-NEXT: [[P2:%.*]] = getelementptr i8, ptr [[P1]], i64 [[P2_IDX]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 -4 %index = add i64 %a, 1 %p2 = getelementptr , ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_nuw(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_nuw( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr nuw i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr nuw [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr nuw i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_partial_nuw1(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_partial_nuw1( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_partial_nuw2(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_partial_nuw2( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr nuw i8, ptr %base, i64 1 %index = add i64 %a, 2 %p2 = getelementptr nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_partial_nuw3(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_partial_nuw3( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr nuw i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_nuw_disjoint(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_nuw_disjoint( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr nuw i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr nuw [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr nuw i8, ptr %base, i64 1 %index = or disjoint i64 %a, 2 %p2 = getelementptr nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_inbounds_nuw(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_inbounds_nuw( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds nuw i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr inbounds nuw [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr inbounds nuw i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr inbounds nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_partial_inbounds1(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_partial_inbounds1( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr nuw i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr nuw [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr nuw i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr inbounds nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_partial_inbounds2(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_partial_inbounds2( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr nuw i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr nuw [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr inbounds nuw i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_inbounds_partial_nuw1(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_inbounds_partial_nuw1( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 7 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr inbounds i8, ptr %base, i64 -1 %index = add nuw i64 %a, 2 %p2 = getelementptr inbounds nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_inbounds_partial_nuw2(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_inbounds_partial_nuw2( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr inbounds nuw i8, ptr %base, i64 1 %index = add nuw i64 %a, 2 %p2 = getelementptr inbounds i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_inbounds_partial_nuw3(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_inbounds_partial_nuw3( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr inbounds nuw i8, ptr %base, i64 1 %index = add i64 %a, 2 %p2 = getelementptr inbounds nuw i32, ptr %p1, i64 %index ret ptr %p2 } define ptr @test_all_nusw_nuw(ptr %base, i64 %a) { ; CHECK-LABEL: define ptr @test_all_nusw_nuw( ; CHECK-SAME: ptr [[BASE:%.*]], i64 [[A:%.*]]) { ; CHECK-NEXT: entry: ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr nuw i8, ptr [[BASE]], i64 9 ; CHECK-NEXT: [[P2:%.*]] = getelementptr nuw [4 x i8], ptr [[TMP0]], i64 [[A]] ; CHECK-NEXT: ret ptr [[P2]] ; entry: %p1 = getelementptr nusw nuw i8, ptr %base, i64 1 %index = add nsw nuw i64 %a, 2 %p2 = getelementptr nusw nuw i32, ptr %p1, i64 %index ret ptr %p2 }