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39d55321bd
Pointer arithmetic on void pointers (a GNU extension) was going through a different code path and bypassed the pointer-overflow sanitizer. Fixes https://github.com/llvm/llvm-project/issues/66451.
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm < %s | FileCheck -enable-var-scope -check-prefixes=CHECK,X86 %s
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// RUN: %clang_cc1 -triple amdgcn -emit-llvm < %s | FileCheck -enable-var-scope -check-prefixes=CHECK,AMDGCN %s
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// CHECK: @foo ={{.*}} addrspace(1) global
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int foo __attribute__((address_space(1)));
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// CHECK: @ban ={{.*}} addrspace(1) global
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int ban[10] __attribute__((address_space(1)));
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// CHECK: @a ={{.*}} global
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int a __attribute__((address_space(0)));
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// CHECK-LABEL: define{{.*}} i32 @test1()
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// CHECK: load i32, ptr addrspace(1) @foo
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int test1(void) { return foo; }
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// CHECK-LABEL: define{{.*}} i32 @test2(i32 noundef %i)
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// CHECK: load i32, ptr addrspace(1)
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// CHECK-NEXT: ret i32
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int test2(int i) { return ban[i]; }
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// Both A and B point into addrspace(2).
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__attribute__((address_space(2))) int *A, *B;
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// CHECK-LABEL: define{{.*}} void @test3()
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// X86: load ptr addrspace(2), ptr @B
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// AMDGCN: load ptr addrspace(2), ptr addrspacecast (ptr addrspace(1) @B to ptr)
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// CHECK: load i32, ptr addrspace(2)
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// X86: load ptr addrspace(2), ptr @A
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// AMDGCN: load ptr addrspace(2), ptr addrspacecast (ptr addrspace(1) @A to ptr)
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// CHECK: store i32 {{.*}}, ptr addrspace(2)
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void test3(void) {
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*A = *B;
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}
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// PR7437
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typedef struct {
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float aData[1];
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} MyStruct;
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// CHECK-LABEL: define{{.*}} void @test4(
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// CHECK: call void @llvm.memcpy.p0.p2
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// CHECK: call void @llvm.memcpy.p2.p0
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void test4(MyStruct __attribute__((address_space(2))) *pPtr) {
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MyStruct s = pPtr[0];
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pPtr[0] = s;
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}
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// Make sure the right address space is used when doing arithmetic on a void
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// pointer. Make sure no invalid bitcast is introduced.
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// CHECK-LABEL: @void_ptr_arithmetic_test(
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// X86: [[ALLOCA:%.*]] = alloca ptr addrspace(1)
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// X86-NEXT: store ptr addrspace(1) %arg, ptr [[ALLOCA]]
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// X86-NEXT: load ptr addrspace(1), ptr [[ALLOCA]]
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// X86-NEXT: getelementptr inbounds i8, ptr addrspace(1)
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// X86-NEXT: ret ptr addrspace(1)
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void __attribute__((address_space(1)))*
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void_ptr_arithmetic_test(void __attribute__((address_space(1))) *arg) {
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return arg + 4;
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}
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// CHECK-LABEL: define{{.*}} ptr @test5(
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const unsigned *test5(void) {
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// Intentionally leave a part of an array uninitialized. This triggers a
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// different code path contrary to a fully initialized array.
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// X86: ret ptr @test5.bars
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// AMDGCN: ret ptr addrspacecast (ptr addrspace(4) @test5.bars to ptr)
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static const unsigned bars[256] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
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11, 12, 13, 14, 15, 16, 17, 18, 19, 20};
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return &bars[0];
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}
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