derek.holloway
7502bf64a4
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221 lines
11 KiB
C
221 lines
11 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
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// RUN: %clang_cc1 -std=c2y -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-64
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// RUN: %clang_cc1 -std=c2y -triple aarch64-unknown-unknown -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-64
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// RUN: %clang_cc1 -std=c2y -triple ppc64le-unknown-unknown -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-64
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// RUN: %clang_cc1 -std=c2y -triple i686-unknown-unknown -emit-llvm -o - %s | FileCheck %s --check-prefix=CHECK-32
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// This tests the codegen behavior for VLA use in _Countof, which builds upon
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// the code generation for sizeof. It tests a limited set of triples due to
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// variations in VLA handling between platforms, but this test should
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// generalize to all targets.
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typedef typeof(sizeof(0)) size_t;
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// CHECK-64-LABEL: define dso_local i64 @test1(
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// CHECK-64-SAME: i32 noundef{{( signext)?}} [[N:%.*]]) #[[ATTR0:[0-9]+]] {
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// CHECK-64-NEXT: [[ENTRY:.*:]]
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// CHECK-64-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[SAVED_STACK:%.*]] = alloca ptr, align
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// CHECK-64-NEXT: [[__VLA_EXPR0:%.*]] = alloca i64, align
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// CHECK-64-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64
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// CHECK-64-NEXT: [[TMP2:%.*]] = call ptr @llvm.stacksave.p0()
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// CHECK-64-NEXT: store ptr [[TMP2]], ptr [[SAVED_STACK]], align
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// CHECK-64-NEXT: [[VLA:%.*]] = alloca i32, i64 [[TMP1]], align
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// CHECK-64-NEXT: store i64 [[TMP1]], ptr [[__VLA_EXPR0]], align
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// CHECK-64-NEXT: [[TMP3:%.*]] = load ptr, ptr [[SAVED_STACK]], align
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// CHECK-64-NEXT: call void @llvm.stackrestore.p0(ptr [[TMP3]])
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// CHECK-64-NEXT: ret i64 [[TMP1]]
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//
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// CHECK-32-LABEL: define dso_local i32 @test1(
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// CHECK-32-SAME: i32 noundef [[N:%.*]]) #[[ATTR0:[0-9]+]] {
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// CHECK-32-NEXT: [[ENTRY:.*:]]
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// CHECK-32-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[SAVED_STACK:%.*]] = alloca ptr, align
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// CHECK-32-NEXT: [[__VLA_EXPR0:%.*]] = alloca i32, align
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// CHECK-32-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-32-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-32-NEXT: [[TMP1:%.*]] = call ptr @llvm.stacksave.p0()
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// CHECK-32-NEXT: store ptr [[TMP1]], ptr [[SAVED_STACK]], align
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// CHECK-32-NEXT: [[VLA:%.*]] = alloca i32, i32 [[TMP0]], align
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// CHECK-32-NEXT: store i32 [[TMP0]], ptr [[__VLA_EXPR0]], align
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// CHECK-32-NEXT: [[TMP2:%.*]] = load ptr, ptr [[SAVED_STACK]], align
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// CHECK-32-NEXT: call void @llvm.stackrestore.p0(ptr [[TMP2]])
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// CHECK-32-NEXT: ret i32 [[TMP0]]
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//
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size_t test1(int n) {
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int array[n];
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return _Countof(array);
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}
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// CHECK-64-LABEL: define dso_local i64 @test2(
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// CHECK-64-SAME: i32 noundef{{( signext)?}} [[N:%.*]]) #[[ATTR0]] {
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// CHECK-64-NEXT: [[ENTRY:.*:]]
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// CHECK-64-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-64-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64
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// CHECK-64-NEXT: ret i64 [[TMP1]]
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//
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// CHECK-32-LABEL: define dso_local i32 @test2(
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// CHECK-32-SAME: i32 noundef [[N:%.*]]) #[[ATTR0]] {
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// CHECK-32-NEXT: [[ENTRY:.*:]]
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// CHECK-32-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-32-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-32-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-32-NEXT: ret i32 [[TMP0]]
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//
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size_t test2(int n) {
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return _Countof(int[n]);
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}
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// CHECK-64-LABEL: define dso_local i64 @test3(
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// CHECK-64-SAME: i32 noundef{{( signext)?}} [[N:%.*]]) #[[ATTR0]] {
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// CHECK-64-NEXT: [[ENTRY:.*:]]
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// CHECK-64-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[SAVED_STACK:%.*]] = alloca ptr, align
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// CHECK-64-NEXT: [[__VLA_EXPR0:%.*]] = alloca i64, align
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// CHECK-64-NEXT: [[X:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[Y:%.*]] = alloca i32, align
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// CHECK-64-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64
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// CHECK-64-NEXT: [[TMP2:%.*]] = call ptr @llvm.stacksave.p0()
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// CHECK-64-NEXT: store ptr [[TMP2]], ptr [[SAVED_STACK]], align
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// CHECK-64-NEXT: [[VLA:%.*]] = alloca [7 x i32], i64 [[TMP1]], align
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// CHECK-64-NEXT: store i64 [[TMP1]], ptr [[__VLA_EXPR0]], align
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// CHECK-64-NEXT: [[CONV:%.*]] = trunc i64 [[TMP1]] to i32
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// CHECK-64-NEXT: store i32 [[CONV]], ptr [[X]], align
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// CHECK-64-NEXT: store i32 7, ptr [[Y]], align
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// CHECK-64-NEXT: [[TMP3:%.*]] = load i32, ptr [[X]], align
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// CHECK-64-NEXT: [[TMP4:%.*]] = load i32, ptr [[Y]], align
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// CHECK-64-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP3]], [[TMP4]]
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// CHECK-64-NEXT: [[CONV1:%.*]] = sext i32 [[ADD]] to i64
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// CHECK-64-NEXT: [[TMP5:%.*]] = load ptr, ptr [[SAVED_STACK]], align
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// CHECK-64-NEXT: call void @llvm.stackrestore.p0(ptr [[TMP5]])
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// CHECK-64-NEXT: ret i64 [[CONV1]]
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//
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// CHECK-32-LABEL: define dso_local i32 @test3(
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// CHECK-32-SAME: i32 noundef [[N:%.*]]) #[[ATTR0]] {
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// CHECK-32-NEXT: [[ENTRY:.*:]]
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// CHECK-32-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[SAVED_STACK:%.*]] = alloca ptr, align
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// CHECK-32-NEXT: [[__VLA_EXPR0:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[X:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[Y:%.*]] = alloca i32, align
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// CHECK-32-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-32-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-32-NEXT: [[TMP1:%.*]] = call ptr @llvm.stacksave.p0()
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// CHECK-32-NEXT: store ptr [[TMP1]], ptr [[SAVED_STACK]], align
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// CHECK-32-NEXT: [[VLA:%.*]] = alloca [7 x i32], i32 [[TMP0]], align
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// CHECK-32-NEXT: store i32 [[TMP0]], ptr [[__VLA_EXPR0]], align
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// CHECK-32-NEXT: store i32 [[TMP0]], ptr [[X]], align
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// CHECK-32-NEXT: store i32 7, ptr [[Y]], align
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// CHECK-32-NEXT: [[TMP2:%.*]] = load i32, ptr [[X]], align
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// CHECK-32-NEXT: [[TMP3:%.*]] = load i32, ptr [[Y]], align
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// CHECK-32-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP2]], [[TMP3]]
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// CHECK-32-NEXT: [[TMP4:%.*]] = load ptr, ptr [[SAVED_STACK]], align
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// CHECK-32-NEXT: call void @llvm.stackrestore.p0(ptr [[TMP4]])
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// CHECK-32-NEXT: ret i32 [[ADD]]
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//
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size_t test3(int n) {
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int array[n][7];
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int x = _Countof(array);
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int y = _Countof(*array);
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return x + y;
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}
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// CHECK-64-LABEL: define dso_local void @test4(
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// CHECK-64-SAME: i32 noundef{{( signext)?}} [[N:%.*]]) #[[ATTR0]] {
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// CHECK-64-NEXT: [[ENTRY:.*:]]
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// CHECK-64-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[X:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[Y:%.*]] = alloca i32, align
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// CHECK-64-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-64-NEXT: store i32 7, ptr [[X]], align
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// CHECK-64-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[INC:%.*]] = add nsw i32 [[TMP0]], 1
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// CHECK-64-NEXT: store i32 [[INC]], ptr [[N_ADDR]], align
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// CHECK-64-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64
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// CHECK-64-NEXT: [[CONV:%.*]] = trunc i64 [[TMP1]] to i32
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// CHECK-64-NEXT: store i32 [[CONV]], ptr [[Y]], align
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// CHECK-64-NEXT: ret void
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//
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// CHECK-32-LABEL: define dso_local void @test4(
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// CHECK-32-SAME: i32 noundef [[N:%.*]]) #[[ATTR0]] {
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// CHECK-32-NEXT: [[ENTRY:.*:]]
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// CHECK-32-NEXT: [[N_ADDR:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[X:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[Y:%.*]] = alloca i32, align
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// CHECK-32-NEXT: store i32 [[N]], ptr [[N_ADDR]], align
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// CHECK-32-NEXT: store i32 7, ptr [[X]], align
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// CHECK-32-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align
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// CHECK-32-NEXT: [[INC:%.*]] = add nsw i32 [[TMP0]], 1
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// CHECK-32-NEXT: store i32 [[INC]], ptr [[N_ADDR]], align
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// CHECK-32-NEXT: store i32 [[TMP0]], ptr [[Y]], align
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// CHECK-32-NEXT: ret void
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//
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void test4(int n) {
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// n should not be evaluated in this case because the operator does not need
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// to evaluate it to know the result is 7.
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int x = _Countof(int[7][n++]);
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// n should be evaluated in this case, however.
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int y = _Countof(int[n++][7]);
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}
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// CHECK-64-LABEL: define dso_local void @test5(
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// CHECK-64-SAME: ) #[[ATTR0]] {
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// CHECK-64-NEXT: [[ENTRY:.*:]]
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// CHECK-64-NEXT: [[J:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[SAVED_STACK:%.*]] = alloca ptr, align
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// CHECK-64-NEXT: [[A:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[B:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[C:%.*]] = alloca i32, align
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// CHECK-64-NEXT: [[D:%.*]] = alloca i32, align
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// CHECK-64-NEXT: store i32 2, ptr [[J]], align
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// CHECK-64-NEXT: [[TMP0:%.*]] = call ptr @llvm.stacksave.p0()
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// CHECK-64-NEXT: store ptr [[TMP0]], ptr [[SAVED_STACK]], align
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// CHECK-64-NEXT: [[VLA:%.*]] = alloca i32, i64 120, align
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// CHECK-64-NEXT: store i32 1, ptr [[A]], align
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// CHECK-64-NEXT: store i32 4, ptr [[B]], align
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// CHECK-64-NEXT: store i32 5, ptr [[C]], align
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// CHECK-64-NEXT: store i32 6, ptr [[D]], align
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// CHECK-64-NEXT: [[TMP1:%.*]] = load ptr, ptr [[SAVED_STACK]], align
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// CHECK-64-NEXT: call void @llvm.stackrestore.p0(ptr [[TMP1]])
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// CHECK-64-NEXT: ret void
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//
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// CHECK-32-LABEL: define dso_local void @test5(
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// CHECK-32-SAME: ) #[[ATTR0]] {
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// CHECK-32-NEXT: [[ENTRY:.*:]]
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// CHECK-32-NEXT: [[J:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[SAVED_STACK:%.*]] = alloca ptr, align
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// CHECK-32-NEXT: [[A:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[B:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[C:%.*]] = alloca i32, align
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// CHECK-32-NEXT: [[D:%.*]] = alloca i32, align
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// CHECK-32-NEXT: store i32 2, ptr [[J]], align
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// CHECK-32-NEXT: [[TMP0:%.*]] = call ptr @llvm.stacksave.p0()
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// CHECK-32-NEXT: store ptr [[TMP0]], ptr [[SAVED_STACK]], align
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// CHECK-32-NEXT: [[VLA:%.*]] = alloca i32, i32 120, align
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// CHECK-32-NEXT: store i32 1, ptr [[A]], align
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// CHECK-32-NEXT: store i32 4, ptr [[B]], align
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// CHECK-32-NEXT: store i32 5, ptr [[C]], align
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// CHECK-32-NEXT: store i32 6, ptr [[D]], align
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// CHECK-32-NEXT: [[TMP1:%.*]] = load ptr, ptr [[SAVED_STACK]], align
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// CHECK-32-NEXT: call void @llvm.stackrestore.p0(ptr [[TMP1]])
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// CHECK-32-NEXT: ret void
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//
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void test5() {
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// Ensure we're getting the variable-length dimensions correctly. We were
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// previously returning the size of all VLA dimensions multiplied together
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// to get the total element count rather than the element count for a single
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// array rank. See GH141409
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const int j = 2;
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int arr[1][j + 2][j + 3][j + 4];
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int a = _Countof arr;
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int b = _Countof *arr;
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int c = _Countof **arr;
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int d = _Countof ***arr;
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}
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