100 lines
4.5 KiB
C
100 lines
4.5 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm %s -o - | FileCheck %s
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// Capture the type and name so matching later is cleaner.
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struct CompoundTy { int a; };
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// CHECK: @MyCLH ={{.*}} constant [[MY_CLH:[^,]+]]
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const struct CompoundTy *const MyCLH = &(struct CompoundTy){3};
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int* a = &(int){1};
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struct s {int a, b, c;} * b = &(struct s) {1, 2, 3};
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_Complex double * x = &(_Complex double){1.0f};
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typedef int v4i32 __attribute((vector_size(16)));
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v4i32 *y = &(v4i32){1,2,3,4};
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// Check generated code for GNU constant array init from compound literal,
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// for a global variable.
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// CHECK: @compound_array ={{.*}} global [8 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8]
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int compound_array[] = __extension__(__builtin_choose_expr(0, 0, _Generic(1, int: (int[]){1, 2, 3, 4, 5, 6, 7, 8})));
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void xxx() {
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int* a = &(int){1};
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struct s {int a, b, c;} * b = &(struct s) {1, 2, 3};
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_Complex double * x = &(_Complex double){1.0f};
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}
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// CHECK-LABEL: define{{.*}} void @f()
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void f() {
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typedef struct S { int x,y; } S;
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// CHECK: [[S:%[a-zA-Z0-9.]+]] = alloca [[STRUCT:%[a-zA-Z0-9.]+]],
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struct S s;
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// CHECK-NEXT: [[COMPOUNDLIT:%[a-zA-Z0-9.]+]] = alloca [[STRUCT]]
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// CHECK-NEXT: [[CX:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]], [[STRUCT]]* [[COMPOUNDLIT]], i32 0, i32 0
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// CHECK-NEXT: [[SY:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]], [[STRUCT]]* [[S]], i32 0, i32 1
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// CHECK-NEXT: [[TMP:%[a-zA-Z0-9.]+]] = load i32, i32* [[SY]]
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// CHECK-NEXT: store i32 [[TMP]], i32* [[CX]]
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// CHECK-NEXT: [[CY:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]], [[STRUCT]]* [[COMPOUNDLIT]], i32 0, i32 1
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// CHECK-NEXT: [[SX:%[a-zA-Z0-9.]+]] = getelementptr inbounds [[STRUCT]], [[STRUCT]]* [[S]], i32 0, i32 0
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// CHECK-NEXT: [[TMP:%[a-zA-Z0-9.]+]] = load i32, i32* [[SX]]
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// CHECK-NEXT: store i32 [[TMP]], i32* [[CY]]
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// CHECK-NEXT: [[SI8:%[a-zA-Z0-9.]+]] = bitcast [[STRUCT]]* [[S]] to i8*
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// CHECK-NEXT: [[COMPOUNDLITI8:%[a-zA-Z0-9.]+]] = bitcast [[STRUCT]]* [[COMPOUNDLIT]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy{{.*}}(i8* align {{[0-9]+}} [[SI8]], i8* align {{[0-9]+}} [[COMPOUNDLITI8]]
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s = (S){s.y,s.x};
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// CHECK-NEXT: ret void
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}
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// CHECK-LABEL: define{{.*}} i48 @g(
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struct G { short x, y, z; };
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struct G g(int x, int y, int z) {
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// CHECK: [[RESULT:%.*]] = alloca [[G:%.*]], align 2
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// CHECK-NEXT: [[X:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[Y:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[Z:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[COERCE_TEMP:%.*]] = alloca i48
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// CHECK-NEXT: store i32
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// CHECK-NEXT: store i32
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// CHECK-NEXT: store i32
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// Evaluate the compound literal directly in the result value slot.
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[G]], [[G]]* [[RESULT]], i32 0, i32 0
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// CHECK-NEXT: [[T1:%.*]] = load i32, i32* [[X]], align 4
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// CHECK-NEXT: [[T2:%.*]] = trunc i32 [[T1]] to i16
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// CHECK-NEXT: store i16 [[T2]], i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[G]], [[G]]* [[RESULT]], i32 0, i32 1
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// CHECK-NEXT: [[T1:%.*]] = load i32, i32* [[Y]], align 4
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// CHECK-NEXT: [[T2:%.*]] = trunc i32 [[T1]] to i16
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// CHECK-NEXT: store i16 [[T2]], i16* [[T0]], align 2
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// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[G]], [[G]]* [[RESULT]], i32 0, i32 2
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// CHECK-NEXT: [[T1:%.*]] = load i32, i32* [[Z]], align 4
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// CHECK-NEXT: [[T2:%.*]] = trunc i32 [[T1]] to i16
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// CHECK-NEXT: store i16 [[T2]], i16* [[T0]], align 2
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return (struct G) { x, y, z };
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// CHECK-NEXT: [[T0:%.*]] = bitcast i48* [[COERCE_TEMP]] to i8*
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// CHECK-NEXT: [[T1:%.*]] = bitcast [[G]]* [[RESULT]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align {{[0-9]+}} [[T0]], i8* align {{[0-9]+}} [[T1]], i64 6
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// CHECK-NEXT: [[T0:%.*]] = load i48, i48* [[COERCE_TEMP]]
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// CHECK-NEXT: ret i48 [[T0]]
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}
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// We had a bug where we'd emit a new GlobalVariable for each time we used a
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// const pointer to a variable initialized by a compound literal.
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// CHECK-LABEL: define{{.*}} i32 @compareMyCLH() #0
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int compareMyCLH() {
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// CHECK: store i8* bitcast ([[MY_CLH]] to i8*)
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const void *a = MyCLH;
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// CHECK: store i8* bitcast ([[MY_CLH]] to i8*)
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const void *b = MyCLH;
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return a == b;
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}
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// Check generated code for GNU constant array init from compound literal,
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// for a local variable.
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// CHECK-LABEL: define{{.*}} i32 @compound_array_fn()
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// CHECK: [[COMPOUND_ARRAY:%.*]] = alloca [8 x i32]
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}, i64 32, i1 false)
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int compound_array_fn() {
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int compound_array[] = (int[]){1,2,3,4,5,6,7,8};
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return compound_array[0];
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}
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