101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
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// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | opt -S -strip -o %t
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// RUN: FileCheck --check-prefix=CHECK-GLOBAL < %t %s
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// RUN: FileCheck --check-prefix=CHECK-FUNCTIONS < %t %s
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struct s0 {
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int x;
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int y __attribute__((packed));
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};
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// CHECK-GLOBAL: @s0_align_x = global i32 4
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// CHECK-GLOBAL: @s0_align_y = global i32 1
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// CHECK-GLOBAL: @s0_align = global i32 4
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int s0_align_x = __alignof(((struct s0*)0)->x);
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int s0_align_y = __alignof(((struct s0*)0)->y);
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int s0_align = __alignof(struct s0);
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// CHECK-FUNCTIONS-LABEL: define i32 @s0_load_x
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// CHECK-FUNCTIONS: [[s0_load_x:%.*]] = load i32* {{.*}}, align 4
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// CHECK-FUNCTIONS: ret i32 [[s0_load_x]]
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int s0_load_x(struct s0 *a) { return a->x; }
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// FIXME: This seems like it should be align 1. This is actually something which
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// has changed in llvm-gcc recently, previously both x and y would be loaded
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// with align 1 (in 2363.1 at least).
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//
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// CHECK-FUNCTIONS-LABEL: define i32 @s0_load_y
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// CHECK-FUNCTIONS: [[s0_load_y:%.*]] = load i32* {{.*}}, align 1
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// CHECK-FUNCTIONS: ret i32 [[s0_load_y]]
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int s0_load_y(struct s0 *a) { return a->y; }
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// CHECK-FUNCTIONS-LABEL: define void @s0_copy
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// CHECK-FUNCTIONS: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* {{.*}}, i64 8, i32 4, i1 false)
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void s0_copy(struct s0 *a, struct s0 *b) { *b = *a; }
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//
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struct s1 {
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int x;
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int y;
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} __attribute__((packed));
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// CHECK-GLOBAL: @s1_align_x = global i32 1
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// CHECK-GLOBAL: @s1_align_y = global i32 1
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// CHECK-GLOBAL: @s1_align = global i32 1
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int s1_align_x = __alignof(((struct s1*)0)->x);
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int s1_align_y = __alignof(((struct s1*)0)->y);
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int s1_align = __alignof(struct s1);
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// CHECK-FUNCTIONS-LABEL: define i32 @s1_load_x
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// CHECK-FUNCTIONS: [[s1_load_x:%.*]] = load i32* {{.*}}, align 1
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// CHECK-FUNCTIONS: ret i32 [[s1_load_x]]
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int s1_load_x(struct s1 *a) { return a->x; }
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// CHECK-FUNCTIONS-LABEL: define i32 @s1_load_y
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// CHECK-FUNCTIONS: [[s1_load_y:%.*]] = load i32* {{.*}}, align 1
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// CHECK-FUNCTIONS: ret i32 [[s1_load_y]]
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int s1_load_y(struct s1 *a) { return a->y; }
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// CHECK-FUNCTIONS-LABEL: define void @s1_copy
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// CHECK-FUNCTIONS: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* {{.*}}, i64 8, i32 1, i1 false)
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void s1_copy(struct s1 *a, struct s1 *b) { *b = *a; }
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//
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#pragma pack(push,2)
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struct s2 {
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int x;
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int y;
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};
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#pragma pack(pop)
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// CHECK-GLOBAL: @s2_align_x = global i32 2
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// CHECK-GLOBAL: @s2_align_y = global i32 2
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// CHECK-GLOBAL: @s2_align = global i32 2
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int s2_align_x = __alignof(((struct s2*)0)->x);
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int s2_align_y = __alignof(((struct s2*)0)->y);
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int s2_align = __alignof(struct s2);
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// CHECK-FUNCTIONS-LABEL: define i32 @s2_load_x
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// CHECK-FUNCTIONS: [[s2_load_y:%.*]] = load i32* {{.*}}, align 2
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// CHECK-FUNCTIONS: ret i32 [[s2_load_y]]
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int s2_load_x(struct s2 *a) { return a->x; }
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// CHECK-FUNCTIONS-LABEL: define i32 @s2_load_y
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// CHECK-FUNCTIONS: [[s2_load_y:%.*]] = load i32* {{.*}}, align 2
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// CHECK-FUNCTIONS: ret i32 [[s2_load_y]]
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int s2_load_y(struct s2 *a) { return a->y; }
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// CHECK-FUNCTIONS-LABEL: define void @s2_copy
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// CHECK-FUNCTIONS: call void @llvm.memcpy.p0i8.p0i8.i64(i8* {{.*}}, i8* {{.*}}, i64 8, i32 2, i1 false)
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void s2_copy(struct s2 *a, struct s2 *b) { *b = *a; }
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struct __attribute__((packed, aligned)) s3 {
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short aShort;
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int anInt;
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};
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// CHECK-GLOBAL: @s3_1 = global i32 1
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int s3_1 = __alignof(((struct s3*) 0)->anInt);
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// CHECK-FUNCTIONS-LABEL: define i32 @test3(
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int test3(struct s3 *ptr) {
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// CHECK-FUNCTIONS: [[PTR:%.*]] = getelementptr inbounds {{%.*}}* {{%.*}}, i32 0, i32 1
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// CHECK-FUNCTIONS-NEXT: load i32* [[PTR]], align 1
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return ptr->anInt;
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}
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