158d72d728
Set the writable and dead_on_unwind attributes for sret arguments. These indicate that the argument points to writable memory (and it's legal to introduce spurious writes to it on entry to the function) and that the argument memory will not be used if the call unwinds. This enables additional MemCpyOpt/DSE/LICM optimizations.
231 lines
9.9 KiB
C
231 lines
9.9 KiB
C
// REQUIRES: arm-registered-target
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// RUN: %clang_cc1 -triple armv7---eabi -target-abi aapcs -mfloat-abi hard -emit-llvm %s -o - | FileCheck %s
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// RUN: %clang_cc1 -triple arm64-apple-darwin9 -target-abi darwinpcs \
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// RUN: -ffreestanding -emit-llvm -w -o - %s | FileCheck -check-prefix=CHECK64 %s
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// RUN: %clang_cc1 -triple arm64-linux-gnu -ffreestanding -emit-llvm -w -o - %s \
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// RUN: | FileCheck --check-prefix=CHECK64 %s
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typedef long long int64_t;
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typedef unsigned int uint32_t;
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/* This is not a homogenous aggregate - fundamental types are different */
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typedef union {
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float f[4];
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uint32_t i[4];
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} union_with_first_floats;
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union_with_first_floats g_u_f;
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extern void takes_union_with_first_floats(union_with_first_floats a);
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extern union_with_first_floats returns_union_with_first_floats(void);
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void test_union_with_first_floats(void) {
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takes_union_with_first_floats(g_u_f);
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_union_with_first_floats([4 x i32])
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void test_return_union_with_first_floats(void) {
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g_u_f = returns_union_with_first_floats();
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}
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// CHECK: declare arm_aapcs_vfpcc void @returns_union_with_first_floats(ptr dead_on_unwind writable sret(%union.union_with_first_floats) align 4)
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/* This is not a homogenous aggregate - fundamental types are different */
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typedef union {
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uint32_t i[4];
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float f[4];
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} union_with_non_first_floats;
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union_with_non_first_floats g_u_nf_f;
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extern void takes_union_with_non_first_floats(union_with_non_first_floats a);
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extern union_with_non_first_floats returns_union_with_non_first_floats(void);
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void test_union_with_non_first_floats(void) {
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takes_union_with_non_first_floats(g_u_nf_f);
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_union_with_non_first_floats([4 x i32])
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void test_return_union_with_non_first_floats(void) {
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g_u_nf_f = returns_union_with_non_first_floats();
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}
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// CHECK: declare arm_aapcs_vfpcc void @returns_union_with_non_first_floats(ptr dead_on_unwind writable sret(%union.union_with_non_first_floats) align 4)
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/* This is not a homogenous aggregate - fundamental types are different */
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typedef struct {
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float a;
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union_with_first_floats b;
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} struct_with_union_with_first_floats;
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struct_with_union_with_first_floats g_s_f;
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extern void takes_struct_with_union_with_first_floats(struct_with_union_with_first_floats a);
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extern struct_with_union_with_first_floats returns_struct_with_union_with_first_floats(void);
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void test_struct_with_union_with_first_floats(void) {
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takes_struct_with_union_with_first_floats(g_s_f);
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_struct_with_union_with_first_floats([5 x i32])
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void test_return_struct_with_union_with_first_floats(void) {
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g_s_f = returns_struct_with_union_with_first_floats();
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}
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// CHECK: declare arm_aapcs_vfpcc void @returns_struct_with_union_with_first_floats(ptr dead_on_unwind writable sret(%struct.struct_with_union_with_first_floats) align 4)
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/* This is not a homogenous aggregate - fundamental types are different */
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typedef struct {
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float a;
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union_with_non_first_floats b;
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} struct_with_union_with_non_first_floats;
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struct_with_union_with_non_first_floats g_s_nf_f;
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extern void takes_struct_with_union_with_non_first_floats(struct_with_union_with_non_first_floats a);
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extern struct_with_union_with_non_first_floats returns_struct_with_union_with_non_first_floats(void);
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void test_struct_with_union_with_non_first_floats(void) {
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takes_struct_with_union_with_non_first_floats(g_s_nf_f);
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_struct_with_union_with_non_first_floats([5 x i32])
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void test_return_struct_with_union_with_non_first_floats(void) {
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g_s_nf_f = returns_struct_with_union_with_non_first_floats();
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}
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// CHECK: declare arm_aapcs_vfpcc void @returns_struct_with_union_with_non_first_floats(ptr dead_on_unwind writable sret(%struct.struct_with_union_with_non_first_floats) align 4)
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/* Plain array is not a homogenous aggregate */
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extern void takes_array_of_floats(float a[4]);
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void test_array_of_floats(void) {
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float a[4] = {1.0, 2.0, 3.0, 4.0};
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takes_array_of_floats(a);
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_array_of_floats(ptr noundef)
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/* Struct-type homogenous aggregate */
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typedef struct {
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float x, y, z, w;
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} struct_with_fundamental_elems;
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struct_with_fundamental_elems g_s;
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extern void takes_struct_with_fundamental_elems(struct_with_fundamental_elems a);
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extern struct_with_fundamental_elems returns_struct_with_fundamental_elems(void);
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void test_struct_with_fundamental_elems(void) {
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takes_struct_with_fundamental_elems(g_s);
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// CHECK: call arm_aapcs_vfpcc void @takes_struct_with_fundamental_elems(%struct.struct_with_fundamental_elems {{.*}})
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_struct_with_fundamental_elems(%struct.struct_with_fundamental_elems)
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void test_return_struct_with_fundamental_elems(void) {
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g_s = returns_struct_with_fundamental_elems();
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// CHECK: call arm_aapcs_vfpcc %struct.struct_with_fundamental_elems @returns_struct_with_fundamental_elems()
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}
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// CHECK: declare arm_aapcs_vfpcc %struct.struct_with_fundamental_elems @returns_struct_with_fundamental_elems()
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/* Array-type homogenous aggregate */
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typedef struct {
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float xyzw[4];
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} struct_with_array;
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struct_with_array g_s_a;
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extern void takes_struct_with_array(struct_with_array a);
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extern struct_with_array returns_struct_with_array(void);
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void test_struct_with_array(void) {
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takes_struct_with_array(g_s_a);
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// CHECK: call arm_aapcs_vfpcc void @takes_struct_with_array(%struct.struct_with_array {{.*}})
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_struct_with_array(%struct.struct_with_array)
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void test_return_struct_with_array(void) {
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g_s_a = returns_struct_with_array();
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// CHECK: call arm_aapcs_vfpcc %struct.struct_with_array @returns_struct_with_array()
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}
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// CHECK: declare arm_aapcs_vfpcc %struct.struct_with_array @returns_struct_with_array()
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/* This union is a homogenous aggregate. Check that it's passed properly */
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typedef union {
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struct_with_fundamental_elems xyzw;
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float a[3];
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} union_with_struct_with_fundamental_elems;
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union_with_struct_with_fundamental_elems g_u_s_fe;
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extern void takes_union_with_struct_with_fundamental_elems(union_with_struct_with_fundamental_elems a);
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extern union_with_struct_with_fundamental_elems returns_union_with_struct_with_fundamental_elems(void);
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void test_union_with_struct_with_fundamental_elems(void) {
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takes_union_with_struct_with_fundamental_elems(g_u_s_fe);
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// CHECK: call arm_aapcs_vfpcc void @takes_union_with_struct_with_fundamental_elems(%union.union_with_struct_with_fundamental_elems {{.*}})
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}
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// CHECK: declare arm_aapcs_vfpcc void @takes_union_with_struct_with_fundamental_elems(%union.union_with_struct_with_fundamental_elems)
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void test_return_union_with_struct_with_fundamental_elems(void) {
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g_u_s_fe = returns_union_with_struct_with_fundamental_elems();
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// CHECK: call arm_aapcs_vfpcc %union.union_with_struct_with_fundamental_elems @returns_union_with_struct_with_fundamental_elems()
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}
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// CHECK: declare arm_aapcs_vfpcc %union.union_with_struct_with_fundamental_elems @returns_union_with_struct_with_fundamental_elems()
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// Make sure HAs that can be partially fit into VFP registers will be allocated
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// on stack and that later VFP candidates will go on stack as well.
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typedef struct {
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double x;
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double a2;
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double a3;
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double a4;
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} struct_of_four_doubles;
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extern void takes_struct_of_four_doubles(double a, struct_of_four_doubles b, struct_of_four_doubles c, double d);
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struct_of_four_doubles g_s4d;
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void test_struct_of_four_doubles(void) {
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// CHECK: test_struct_of_four_doubles
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// CHECK: call arm_aapcs_vfpcc void @takes_struct_of_four_doubles(double {{.*}}, %struct.struct_of_four_doubles {{.*}}, %struct.struct_of_four_doubles {{.*}}, double {{.*}})
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// CHECK64: test_struct_of_four_doubles
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// CHECK64: call void @takes_struct_of_four_doubles(double {{.*}}, [4 x double] {{.*}}, [4 x double] {{.*}}, double {{.*}})
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takes_struct_of_four_doubles(3.0, g_s4d, g_s4d, 4.0);
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}
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extern void takes_struct_of_four_doubles_variadic(double a, struct_of_four_doubles b, struct_of_four_doubles c, double d, ...);
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void test_struct_of_four_doubles_variadic(void) {
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// CHECK: test_struct_of_four_doubles_variadic
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// CHECK: call arm_aapcs_vfpcc void (double, [4 x i64], [4 x i64], double, ...) @takes_struct_of_four_doubles_variadic(double {{.*}}, [4 x i64] {{.*}}, [4 x i64] {{.*}}, double {{.*}})
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takes_struct_of_four_doubles_variadic(3.0, g_s4d, g_s4d, 4.0);
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}
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extern void takes_struct_with_backfill(float f1, double a, float f2, struct_of_four_doubles b, struct_of_four_doubles c, double d);
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void test_struct_with_backfill(void) {
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// CHECK: test_struct_with_backfill
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// CHECK: call arm_aapcs_vfpcc void @takes_struct_with_backfill(float {{.*}}, double {{.*}}, float {{.*}}, %struct.struct_of_four_doubles {{.*}}, %struct.struct_of_four_doubles {{.*}}, double {{.*}})
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takes_struct_with_backfill(3.0, 3.1, 3.2, g_s4d, g_s4d, 4.0);
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}
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typedef __attribute__(( ext_vector_type(8) )) char __char8;
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typedef __attribute__(( ext_vector_type(4) )) short __short4;
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typedef struct {
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__char8 a1;
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__short4 a2;
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__char8 a3;
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__short4 a4;
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} struct_of_vecs;
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extern void takes_struct_of_vecs(double a, struct_of_vecs b, struct_of_vecs c, double d);
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struct_of_vecs g_vec;
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void test_struct_of_vecs(void) {
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// CHECK: test_struct_of_vecs
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// CHECK: call arm_aapcs_vfpcc void @takes_struct_of_vecs(double {{.*}}, %struct.struct_of_vecs {{.*}}, %struct.struct_of_vecs {{.*}}, double {{.*}})
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// CHECK64: test_struct_of_vecs
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// CHECK64: call void @takes_struct_of_vecs(double {{.*}}, [4 x <8 x i8>] {{.*}}, [4 x <8 x i8>] {{.*}}, double {{.*}})
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takes_struct_of_vecs(3.0, g_vec, g_vec, 4.0);
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}
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typedef struct {
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double a;
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long double b;
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} struct_of_double_and_long_double;
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struct_of_double_and_long_double g_dld;
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struct_of_double_and_long_double test_struct_of_double_and_long_double(void) {
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return g_dld;
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}
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// CHECK: define{{.*}} arm_aapcs_vfpcc %struct.struct_of_double_and_long_double @test_struct_of_double_and_long_double()
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// FIXME: Tests necessary:
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// - Vectors
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// - C++ stuff
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