forked from OSchip/llvm-project
198 lines
6.5 KiB
C
198 lines
6.5 KiB
C
// RUN: %clang_cc1 -triple i386-unknown-unknown %s -emit-llvm -o - | FileCheck %s
|
|
|
|
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];
|
|
}
|
|
|
|
// rdar://8403108
|
|
// CHECK-LABEL: define void @f_8403108
|
|
void f_8403108(unsigned x) {
|
|
// CHECK: call i8* @llvm.stacksave()
|
|
char s1[x];
|
|
while (1) {
|
|
// CHECK: call i8* @llvm.stacksave()
|
|
char s2[x];
|
|
if (1)
|
|
break;
|
|
// CHECK: call void @llvm.stackrestore(i8*
|
|
}
|
|
// CHECK: call void @llvm.stackrestore(i8*
|
|
}
|
|
|
|
// pr7827
|
|
void function(short width, int data[][width]) {} // expected-note {{passing argument to parameter 'data' here}}
|
|
|
|
void test() {
|
|
int bork[4][13];
|
|
// CHECK: call void @function(i16 signext 1, i32* null)
|
|
function(1, 0);
|
|
// CHECK: call void @function(i16 signext 1, i32* inttoptr
|
|
function(1, 0xbadbeef); // expected-warning {{incompatible integer to pointer conversion passing}}
|
|
// CHECK: call void @function(i16 signext 1, i32* {{.*}})
|
|
function(1, bork);
|
|
}
|
|
|
|
void function1(short width, int data[][width][width]) {}
|
|
void test1() {
|
|
int bork[4][13][15];
|
|
// CHECK: call void @function1(i16 signext 1, i32* {{.*}})
|
|
function1(1, bork);
|
|
// CHECK: call void @function(i16 signext 1, i32* {{.*}})
|
|
function(1, bork[2]);
|
|
}
|
|
|
|
// rdar://8476159
|
|
static int GLOB;
|
|
int test2(int n)
|
|
{
|
|
GLOB = 0;
|
|
char b[1][n+3]; /* Variable length array. */
|
|
// CHECK: [[tmp_1:%.*]] = load i32* @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 [5 x double]*, align 4
|
|
// CHECK-NEXT: store
|
|
// CHECK-NEXT: store
|
|
// CHECK-NEXT: [[N:%.*]] = load i32* [[NV]], align 4
|
|
// CHECK-NEXT: [[P:%.*]] = load [5 x double]** [[PV]], align 4
|
|
// CHECK-NEXT: [[T0:%.*]] = mul nsw i32 1, [[N]]
|
|
// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [5 x double]* [[P]], i32 [[T0]]
|
|
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [5 x double]* [[T1]], i32 2
|
|
// CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds [5 x double]* [[T2]], i32 0, i32 3
|
|
// CHECK-NEXT: [[T4:%.*]] = load double* [[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 [6 x i8]*, align 4
|
|
// CHECK-NEXT: [[P2:%.*]] = alloca [6 x i8]*, align 4
|
|
// CHECK-NEXT: store i32
|
|
// CHECK-NEXT: store [6 x i8]*
|
|
|
|
// VLA captures.
|
|
// CHECK-NEXT: [[DIM0:%.*]] = load i32* [[N]], align 4
|
|
// CHECK-NEXT: [[T0:%.*]] = load i32* [[N]], align 4
|
|
// CHECK-NEXT: [[DIM1:%.*]] = add i32 [[T0]], 1
|
|
|
|
// CHECK-NEXT: [[T0:%.*]] = load [6 x i8]** [[P]], align 4
|
|
// CHECK-NEXT: [[T1:%.*]] = load i32* [[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 [6 x i8]* [[T0]], i32 [[T4]]
|
|
// CHECK-NEXT: [[T6:%.*]] = load i32* [[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]* [[T5]], i32 [[T10]]
|
|
// CHECK-NEXT: store [6 x i8]* [[T11]], [6 x i8]** [[P2]], align 4
|
|
__typeof(p) p2 = (p + n/2) - n/4;
|
|
|
|
// CHECK-NEXT: [[T0:%.*]] = load [6 x i8]** [[P2]], align 4
|
|
// CHECK-NEXT: [[T1:%.*]] = load [6 x i8]** [[P]], align 4
|
|
// CHECK-NEXT: [[T2:%.*]] = ptrtoint [6 x i8]* [[T0]] to i32
|
|
// CHECK-NEXT: [[T3:%.*]] = ptrtoint [6 x i8]* [[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;
|
|
}
|
|
|
|
// rdar://11485774
|
|
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 i32*, align 4
|
|
// CHECK-NEXT: store i32 0, i32* [[I]], align 4
|
|
|
|
(typeof(++i, (int (*)[i])a)){&a} += 0;
|
|
// CHECK-NEXT: [[Z:%.*]] = load i32* [[I]], align 4
|
|
// CHECK-NEXT: [[INC:%.*]] = add nsw i32 [[Z]], 1
|
|
// CHECK-NEXT: store i32 [[INC]], i32* [[I]], align 4
|
|
// CHECK-NEXT: [[O:%.*]] = load i32* [[I]], align 4
|
|
// CHECK-NEXT: [[AR:%.*]] = getelementptr inbounds [5 x i32]* [[A]], i32 0, i32 0
|
|
// CHECK-NEXT: [[T:%.*]] = bitcast [5 x i32]* [[A]] to i32*
|
|
// CHECK-NEXT: store i32* [[T]], i32** [[CL]]
|
|
// CHECK-NEXT: [[TH:%.*]] = load i32** [[CL]]
|
|
// CHECK-NEXT: [[VLAIX:%.*]] = mul nsw i32 0, [[O]]
|
|
// CHECK-NEXT: [[ADDPTR:%.*]] = getelementptr inbounds i32* [[TH]], i32 [[VLAIX]]
|
|
// CHECK-NEXT: store i32* [[ADDPTR]], i32** [[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 i32**, align 4
|
|
// CHECK-NEXT: [[I:%.*]] = alloca i32, align 4
|
|
(int (**)[i]){&a}[0][1][5] = 0;
|
|
// CHECK-NEXT: [[CL:%.*]] = alloca i32**, align 4
|
|
// CHECK-NEXT: store i32 20, i32* [[N]], align 4
|
|
// CHECK-NEXT: store i32 0, i32* [[I]], align 4
|
|
// CHECK-NEXT: [[Z:%.*]] = load i32* [[I]], align 4
|
|
// CHECK-NEXT: [[O:%.*]] = bitcast i32*** [[A]] to i32**
|
|
// CHECK-NEXT: store i32** [[O]], i32*** [[CL]]
|
|
// CHECK-NEXT: [[T:%.*]] = load i32*** [[CL]]
|
|
// CHECK-NEXT: [[IX:%.*]] = getelementptr inbounds i32** [[T]], i32 0
|
|
// CHECK-NEXT: [[TH:%.*]] = load i32** [[IX]], align 4
|
|
// CHECK-NEXT: [[F:%.*]] = mul nsw i32 1, [[Z]]
|
|
// CHECK-NEXT: [[IX1:%.*]] = getelementptr inbounds i32* [[TH]], i32 [[F]]
|
|
// CHECK-NEXT: [[IX2:%.*]] = getelementptr inbounds i32* [[IX1]], i32 5
|
|
// CHECK-NEXT: store i32 0, i32* [[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(i8* null)
|
|
}
|