Files
RedBear-OS/local/recipes/dev/libclc/source/clang/test/CodeGen/vla.c
T
vasilito cb424d7448 build: static patch-sanity linter (shift-left the malformed-patch class)
verify-patch-sanity.py validates every active recipe .patch has internally-
consistent hunk line counts — catching the 'malformed patch at line N' failure
at commit/CI/preflight time instead of hours into a cook. This cycle hit that
class three times (qtwaylandscanner, sddm, xwayland), each only discovered when
cookbook tried to apply the patch.

Running it across the repo found 29 latent malformed patches (validated against
GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22').
They were harmless only because they sit in vendored recipes (baked, not re-
applied) — but would fail on any version-bump re-derivation. --fix recounts the
hunk headers (body untouched) and repaired all 29.

Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test
(test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats
(empty placeholders, bare-@@ git hunks).
2026-08-01 05:13:02 +03:00

220 lines
7.6 KiB
C

// RUN: %clang_cc1 -Wno-int-conversion -triple i386-unknown-unknown %s -emit-llvm -o - | FileCheck %s -check-prefixes=CHECK,NULL-INVALID
// RUN: %clang_cc1 -Wno-int-conversion -triple i386-unknown-unknown %s -emit-llvm -fno-delete-null-pointer-checks -o - | FileCheck %s -check-prefixes=CHECK,NULL-VALID
int b(char* x);
// Extremely basic VLA test
void a(int x) {
char arry[x];
arry[0] = 10;
b(arry);
}
int c(int n)
{
return sizeof(int[n]);
}
int f0(int x) {
int vla[x];
return vla[x-1];
}
void
f(int count)
{
int a[count];
do { } while (0);
if (a[0] != 3) {
}
}
void g(int count) {
// Make sure we emit sizes correctly in some obscure cases
int (*a[5])[count];
int (*b)[][count];
}
// CHECK-LABEL: define{{.*}} void @f_8403108
void f_8403108(unsigned x) {
// CHECK: call ptr @llvm.stacksave.p0()
char s1[x];
while (1) {
// CHECK: call ptr @llvm.stacksave.p0()
char s2[x];
if (1)
break;
// CHECK: call void @llvm.stackrestore.p0(ptr
}
// CHECK: call void @llvm.stackrestore.p0(ptr
}
// pr7827
void function(short width, int data[][width]) {} // expected-note {{passing argument to parameter 'data' here}}
void test(void) {
int bork[4][13];
// CHECK: call void @function(i16 noundef signext 1, ptr noundef null)
function(1, 0);
// CHECK: call void @function(i16 noundef signext 1, ptr noundef inttoptr
function(1, 0xbadbeef); // expected-warning {{incompatible integer to pointer conversion passing}}
// CHECK: call void @function(i16 noundef signext 1, ptr noundef {{.*}})
function(1, bork);
}
void function1(short width, int data[][width][width]) {}
void test1(void) {
int bork[4][13][15];
// CHECK: call void @function1(i16 noundef signext 1, ptr noundef {{.*}})
function1(1, bork);
// CHECK: call void @function(i16 noundef signext 1, ptr noundef {{.*}})
function(1, bork[2]);
}
static int GLOB;
int test2(int n)
{
GLOB = 0;
char b[1][n+3]; /* Variable length array. */
// CHECK: [[tmp_1:%.*]] = load i32, ptr @GLOB, align 4
// CHECK-NEXT: add nsw i32 [[tmp_1]], 1
__typeof__(b[GLOB++]) c;
return GLOB;
}
// http://llvm.org/PR8567
// CHECK-LABEL: define{{.*}} double @test_PR8567
double test_PR8567(int n, double (*p)[n][5]) {
// CHECK: [[NV:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[PV:%.*]] = alloca ptr, align 4
// CHECK-NEXT: store
// CHECK-NEXT: store
// CHECK-NEXT: [[N:%.*]] = load i32, ptr [[NV]], align 4
// CHECK-NEXT: [[P:%.*]] = load ptr, ptr [[PV]], align 4
// CHECK-NEXT: [[T0:%.*]] = mul nsw i32 1, [[N]]
// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [5 x double], ptr [[P]], i32 [[T0]]
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [5 x double], ptr [[T1]], i32 2
// CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds [5 x double], ptr [[T2]], i32 0, i32 3
// CHECK-NEXT: [[T4:%.*]] = load double, ptr [[T3]]
// CHECK-NEXT: ret double [[T4]]
return p[1][2][3];
}
int test4(unsigned n, char (*p)[n][n+1][6]) {
// CHECK-LABEL: define{{.*}} i32 @test4(
// CHECK: [[N:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[P:%.*]] = alloca ptr, align 4
// CHECK-NEXT: [[P2:%.*]] = alloca ptr, align 4
// CHECK-NEXT: store i32
// CHECK-NEXT: store ptr
// VLA captures.
// CHECK-NEXT: [[DIM0:%.*]] = load i32, ptr [[N]], align 4
// CHECK-NEXT: [[T0:%.*]] = load i32, ptr [[N]], align 4
// CHECK-NEXT: [[DIM1:%.*]] = add i32 [[T0]], 1
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[P]], align 4
// CHECK-NEXT: [[T1:%.*]] = load i32, ptr [[N]], align 4
// CHECK-NEXT: [[T2:%.*]] = udiv i32 [[T1]], 2
// CHECK-NEXT: [[T3:%.*]] = mul nuw i32 [[DIM0]], [[DIM1]]
// CHECK-NEXT: [[T4:%.*]] = mul nsw i32 [[T2]], [[T3]]
// CHECK-NEXT: [[T5:%.*]] = getelementptr inbounds nuw [6 x i8], ptr [[T0]], i32 [[T4]]
// CHECK-NEXT: [[T6:%.*]] = load i32, ptr [[N]], align 4
// CHECK-NEXT: [[T7:%.*]] = udiv i32 [[T6]], 4
// CHECK-NEXT: [[T8:%.*]] = sub i32 0, [[T7]]
// CHECK-NEXT: [[T9:%.*]] = mul nuw i32 [[DIM0]], [[DIM1]]
// CHECK-NEXT: [[T10:%.*]] = mul nsw i32 [[T8]], [[T9]]
// CHECK-NEXT: [[T11:%.*]] = getelementptr inbounds [6 x i8], ptr [[T5]], i32 [[T10]]
// CHECK-NEXT: store ptr [[T11]], ptr [[P2]], align 4
__typeof(p) p2 = (p + n/2) - n/4;
// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[P2]], align 4
// CHECK-NEXT: [[T1:%.*]] = load ptr, ptr [[P]], align 4
// CHECK-NEXT: [[T2:%.*]] = ptrtoint ptr [[T0]] to i32
// CHECK-NEXT: [[T3:%.*]] = ptrtoint ptr [[T1]] to i32
// CHECK-NEXT: [[T4:%.*]] = sub i32 [[T2]], [[T3]]
// CHECK-NEXT: [[T5:%.*]] = mul nuw i32 [[DIM0]], [[DIM1]]
// CHECK-NEXT: [[T6:%.*]] = mul nuw i32 6, [[T5]]
// CHECK-NEXT: [[T7:%.*]] = sdiv exact i32 [[T4]], [[T6]]
// CHECK-NEXT: ret i32 [[T7]]
return p2 - p;
}
void test5(void)
{
// CHECK-LABEL: define{{.*}} void @test5(
int a[5], i = 0;
// CHECK: [[A:%.*]] = alloca [5 x i32], align 4
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[CL:%.*]] = alloca ptr, align 4
// CHECK-NEXT: store i32 0, ptr [[I]], align 4
(typeof(++i, (int (*)[i])a)){&a} += 0;
// CHECK-NEXT: [[Z:%.*]] = load i32, ptr [[I]], align 4
// CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[Z]], 1
// CHECK-NEXT: store i32 [[INC]], ptr [[I]], align 4
// CHECK-NEXT: [[O:%.*]] = load i32, ptr [[I]], align 4
// CHECK-NEXT: [[AR:%.*]] = getelementptr inbounds [5 x i32], ptr [[A]], i32 0, i32 0
// CHECK-NEXT: store ptr [[A]], ptr [[CL]]
// CHECK-NEXT: [[TH:%.*]] = load ptr, ptr [[CL]]
// CHECK-NEXT: [[VLAIX:%.*]] = mul nsw i32 0, [[O]]
// CHECK-NEXT: [[ADDPTR:%.*]] = getelementptr inbounds i32, ptr [[TH]], i32 [[VLAIX]]
// CHECK-NEXT: store ptr [[ADDPTR]], ptr [[CL]]
}
void test6(void)
{
// CHECK-LABEL: define{{.*}} void @test6(
int n = 20, **a, i=0;
// CHECK: [[N:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[A:%.*]] = alloca ptr, align 4
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
(int (**)[i]){&a}[0][1][5] = 0;
// CHECK-NEXT: [[CL:%.*]] = alloca ptr, align 4
// CHECK-NEXT: store i32 20, ptr [[N]], align 4
// CHECK-NEXT: store i32 0, ptr [[I]], align 4
// CHECK-NEXT: [[Z:%.*]] = load i32, ptr [[I]], align 4
// CHECK-NEXT: store ptr [[A]], ptr [[CL]]
// CHECK-NEXT: [[T:%.*]] = load ptr, ptr [[CL]]
// CHECK-NEXT: [[IX:%.*]] = getelementptr inbounds ptr, ptr [[T]], i32 0
// CHECK-NEXT: [[TH:%.*]] = load ptr, ptr [[IX]], align 4
// CHECK-NEXT: [[F:%.*]] = mul nsw i32 1, [[Z]]
// CHECK-NEXT: [[IX1:%.*]] = getelementptr inbounds i32, ptr [[TH]], i32 [[F]]
// CHECK-NEXT: [[IX2:%.*]] = getelementptr inbounds i32, ptr [[IX1]], i32 5
// CHECK-NEXT: store i32 0, ptr [[IX2]], align 4
}
// Follow gcc's behavior for VLAs in parameter lists. PR9559.
void test7(int a[b(0)]) {
// CHECK-LABEL: define{{.*}} void @test7(
// CHECK: call i32 @b(ptr noundef null)
}
// Make sure we emit dereferenceable or nonnull when the static keyword is
// provided.
void test8(int a[static 3]) { }
// CHECK: define{{.*}} void @test8(ptr noundef align 4 dereferenceable(12) %a)
void test9(int n, int a[static n]) { }
// NULL-INVALID: define{{.*}} void @test9(i32 noundef %n, ptr noundef nonnull align 4 %a)
// NULL-VALID: define{{.*}} void @test9(i32 noundef %n, ptr noundef align 4 %a)
// Make sure a zero-sized static array extent is still required to be nonnull.
void test10(int a[static 0]) {}
// NULL-INVALID: define{{.*}} void @test10(ptr noundef nonnull align 4 %a)
// NULL-VALID: define{{.*}} void @test10(ptr noundef align 4 %a)
const int constant = 32;
// CHECK: define {{.*}}pr44406(
int pr44406(void) {
int n = 0;
// Do not fold this VLA to an array of constant bound; that would miscompile
// this testcase.
char c[1][(constant - constant) + 3];
// CHECK: store i32 1,
sizeof(c[n = 1]);
return n;
}