Differential D60456 Diff 208392 clang/test/CodeGen/riscv64-lp64f-lp64d-abi.c

Changeset View

Standalone View

clang/test/CodeGen/riscv64-lp64f-lp64d-abi.c

This file was added.

				// RUN: %clang_cc1 -triple riscv64 -target-feature +f -target-abi lp64f -emit-llvm %s -o - \
				// RUN: \| FileCheck %s
				// RUN: %clang_cc1 -triple riscv64 -target-feature +d -target-abi lp64d -emit-llvm %s -o - \
				// RUN: \| FileCheck %s

				#include <stdint.h>

				// Verify that the tracking of used GPRs and FPRs works correctly by checking
				// that small integers are sign/zero extended when passed in registers.

				// Floats are passed in FPRs, so argument 'i' will be passed zero-extended
				// because it will be passed in a GPR.

				// CHECK: define void @f_fpr_tracking(float %a, float %b, float %c, float %d, float %e, float %f, float %g, float %h, i8 zeroext %i)
				void f_fpr_tracking(float a, float b, float c, float d, float e, float f,
				float g, float h, uint8_t i) {}

				// Check that fp, fp+fp, and int+fp structs are lowered correctly. These will
				// be passed in FPR, FPR+FPR, or GPR+FPR regs if sufficient registers are
				// available the widths are <= XLEN and FLEN, and should be expanded to
				// separate arguments in IR. They are passed by the same rules for returns,
				// but will be lowered to simple two-element structs if necessary (as LLVM IR
				// functions cannot return multiple values).

				// A struct containing just one floating-point real is passed as though it
				// were a standalone floating-point real.

				struct float_s { float f; };

				// CHECK: define void @f_float_s_arg(float)
				void f_float_s_arg(struct float_s a) {}

				// CHECK: define float @f_ret_float_s()
				struct float_s f_ret_float_s() {
				return (struct float_s){1.0};
				}

				// A struct containing a float and any number of zero-width bitfields is
				// passed as though it were a standalone floating-point real.

				struct zbf_float_s { int : 0; float f; };
				struct zbf_float_zbf_s { int : 0; float f; int : 0; };

				// CHECK: define void @f_zbf_float_s_arg(float)
				void f_zbf_float_s_arg(struct zbf_float_s a) {}

				// CHECK: define float @f_ret_zbf_float_s()
				struct zbf_float_s f_ret_zbf_float_s() {
				return (struct zbf_float_s){1.0};
				}

				// CHECK: define void @f_zbf_float_zbf_s_arg(float)
				void f_zbf_float_zbf_s_arg(struct zbf_float_zbf_s a) {}

				// CHECK: define float @f_ret_zbf_float_zbf_s()
				struct zbf_float_zbf_s f_ret_zbf_float_zbf_s() {
				return (struct zbf_float_zbf_s){1.0};
				}

				// Check that structs containing two float values (FLEN <= width) are expanded
				// provided sufficient FPRs are available.

				struct float_float_s { float f; float g; };

				// CHECK: define void @f_float_float_s_arg(float, float)
				void f_float_float_s_arg(struct float_float_s a) {}

				// CHECK: define { float, float } @f_ret_float_float_s()
				struct float_float_s f_ret_float_float_s() {
				return (struct float_float_s){1.0, 2.0};
				}

				// CHECK: define void @f_float_float_s_arg_insufficient_fprs(float %a, float %b, float %c, float %d, float %e, float %f, float %g, i64 %h.coerce)
				void f_float_float_s_arg_insufficient_fprs(float a, float b, float c, float d,
				float e, float f, float g, struct float_float_s h) {}

				// Check that structs containing int+float values are expanded, provided
				// sufficient FPRs and GPRs are available. The integer components are neither
				// sign or zero-extended.

				struct float_int8_s { float f; int8_t i; };
				struct float_uint8_s { float f; uint8_t i; };
				struct float_int32_s { float f; int32_t i; };
				struct float_int64_s { float f; int64_t i; };
				struct float_int128bf_s { float f; __int128_t i : 64; };
				struct float_int8_zbf_s { float f; int8_t i; int : 0; };

				// CHECK: define void @f_float_int8_s_arg(float, i8)
				void f_float_int8_s_arg(struct float_int8_s a) {}

				// CHECK: define { float, i8 } @f_ret_float_int8_s()
				struct float_int8_s f_ret_float_int8_s() {
				return (struct float_int8_s){1.0, 2};
				}

				// CHECK: define void @f_float_uint8_s_arg(float, i8)
				void f_float_uint8_s_arg(struct float_uint8_s a) {}

				// CHECK: define { float, i8 } @f_ret_float_uint8_s()
				struct float_uint8_s f_ret_float_uint8_s() {
				return (struct float_uint8_s){1.0, 2};
				}

				// CHECK: define void @f_float_int32_s_arg(float, i32)
				void f_float_int32_s_arg(struct float_int32_s a) {}

				// CHECK: define { float, i32 } @f_ret_float_int32_s()
				struct float_int32_s f_ret_float_int32_s() {
				return (struct float_int32_s){1.0, 2};
				}

				// CHECK: define void @f_float_int64_s_arg(float, i64)
				void f_float_int64_s_arg(struct float_int64_s a) {}

				// CHECK: define { float, i64 } @f_ret_float_int64_s()
				struct float_int64_s f_ret_float_int64_s() {
				return (struct float_int64_s){1.0, 2};
				}

				// CHECK: define void @f_float_int128bf_s_arg(float, i64)
				void f_float_int128bf_s_arg(struct float_int128bf_s a) {}

				// CHECK: define <{ float, i64 }> @f_ret_float_int128bf_s()
				struct float_int128bf_s f_ret_float_int128bf_s() {
				return (struct float_int128bf_s){1.0, 2};
				}

				// The zero-width bitfield means the struct can't be passed according to the
				// floating point calling convention.

				// CHECK: define void @f_float_int8_zbf_s(float, i8)
				void f_float_int8_zbf_s(struct float_int8_zbf_s a) {}

				// CHECK: define { float, i8 } @f_ret_float_int8_zbf_s()
				struct float_int8_zbf_s f_ret_float_int8_zbf_s() {
				return (struct float_int8_zbf_s){1.0, 2};
				}

				// CHECK: define void @f_float_int8_s_arg_insufficient_gprs(i32 signext %a, i32 signext %b, i32 signext %c, i32 signext %d, i32 signext %e, i32 signext %f, i32 signext %g, i32 signext %h, i64 %i.coerce)
				void f_float_int8_s_arg_insufficient_gprs(int a, int b, int c, int d, int e,
				int f, int g, int h, struct float_int8_s i) {}

				// CHECK: define void @f_struct_float_int8_insufficient_fprs(float %a, float %b, float %c, float %d, float %e, float %f, float %g, float %h, i64 %i.coerce)
				void f_struct_float_int8_insufficient_fprs(float a, float b, float c, float d,
				float e, float f, float g, float h, struct float_int8_s i) {}

				// Complex floating-point values or structs containing a single complex
				// floating-point value should be passed as if it were an fp+fp struct.

				// CHECK: define void @f_floatcomplex(float %a.coerce0, float %a.coerce1)
				void f_floatcomplex(float __complex__ a) {}

				// CHECK: define { float, float } @f_ret_floatcomplex()
				float __complex__ f_ret_floatcomplex() {
				return 1.0;
				}

				struct floatcomplex_s { float __complex__ c; };

				// CHECK: define void @f_floatcomplex_s_arg(float, float)
				void f_floatcomplex_s_arg(struct floatcomplex_s a) {}

				// CHECK: define { float, float } @f_ret_floatcomplex_s()
				struct floatcomplex_s f_ret_floatcomplex_s() {
				return (struct floatcomplex_s){1.0};
				}

				// Test single or two-element structs that need flattening. e.g. those
				// containing nested structs, floats in small arrays, zero-length structs etc.

				struct floatarr1_s { float a[1]; };

				// CHECK: define void @f_floatarr1_s_arg(float)
				void f_floatarr1_s_arg(struct floatarr1_s a) {}

				// CHECK: define float @f_ret_floatarr1_s()
				struct floatarr1_s f_ret_floatarr1_s() {
				return (struct floatarr1_s){{1.0}};
				}

				struct floatarr2_s { float a[2]; };

				// CHECK: define void @f_floatarr2_s_arg(float, float)
				void f_floatarr2_s_arg(struct floatarr2_s a) {}

				// CHECK: define { float, float } @f_ret_floatarr2_s()
				struct floatarr2_s f_ret_floatarr2_s() {
				return (struct floatarr2_s){{1.0, 2.0}};
				}

				struct floatarr2_tricky1_s { struct { float f[1]; } g[2]; };

				// CHECK: define void @f_floatarr2_tricky1_s_arg(float, float)
				void f_floatarr2_tricky1_s_arg(struct floatarr2_tricky1_s a) {}

				// CHECK: define { float, float } @f_ret_floatarr2_tricky1_s()
				struct floatarr2_tricky1_s f_ret_floatarr2_tricky1_s() {
				return (struct floatarr2_tricky1_s){{{{1.0}}, {{2.0}}}};
				}

				struct floatarr2_tricky2_s { struct {}; struct { float f[1]; } g[2]; };

				// CHECK: define void @f_floatarr2_tricky2_s_arg(float, float)
				void f_floatarr2_tricky2_s_arg(struct floatarr2_tricky2_s a) {}

				// CHECK: define { float, float } @f_ret_floatarr2_tricky2_s()
				struct floatarr2_tricky2_s f_ret_floatarr2_tricky2_s() {
				return (struct floatarr2_tricky2_s){{}, {{{1.0}}, {{2.0}}}};
				}

				struct floatarr2_tricky3_s { union {}; struct { float f[1]; } g[2]; };

				// CHECK: define void @f_floatarr2_tricky3_s_arg(float, float)
				void f_floatarr2_tricky3_s_arg(struct floatarr2_tricky3_s a) {}

				// CHECK: define { float, float } @f_ret_floatarr2_tricky3_s()
				struct floatarr2_tricky3_s f_ret_floatarr2_tricky3_s() {
				return (struct floatarr2_tricky3_s){{}, {{{1.0}}, {{2.0}}}};
				}

				struct floatarr2_tricky4_s { union {}; struct { struct {}; float f[1]; } g[2]; };

				// CHECK: define void @f_floatarr2_tricky4_s_arg(float, float)
				void f_floatarr2_tricky4_s_arg(struct floatarr2_tricky4_s a) {}

				// CHECK: define { float, float } @f_ret_floatarr2_tricky4_s()
				struct floatarr2_tricky4_s f_ret_floatarr2_tricky4_s() {
				return (struct floatarr2_tricky4_s){{}, {{{}, {1.0}}, {{}, {2.0}}}};
				}

				// Test structs that should be passed according to the normal integer calling
				// convention.

				struct int_float_int_s { int a; float b; int c; };

				// CHECK: define void @f_int_float_int_s_arg([2 x i64] %a.coerce)
				void f_int_float_int_s_arg(struct int_float_int_s a) {}

				// CHECK: define [2 x i64] @f_ret_int_float_int_s()
				struct int_float_int_s f_ret_int_float_int_s() {
				return (struct int_float_int_s){1, 2.0, 3};
				}

				struct char_char_float_s { char a; char b; float c; };

				// CHECK-LABEL: define void @f_char_char_float_s_arg(i64 %a.coerce)
				void f_char_char_float_s_arg(struct char_char_float_s a) {}

				// CHECK: define i64 @f_ret_char_char_float_s()
				struct char_char_float_s f_ret_char_char_float_s() {
				return (struct char_char_float_s){1, 2, 3.0};
				}

				// Unions are always passed according to the integer calling convention, even
				// if they can only contain a float.

				union float_u { float a; };

				// CHECK: define void @f_float_u_arg(i64 %a.coerce)
				void f_float_u_arg(union float_u a) {}

				// CHECK: define i64 @f_ret_float_u()
				union float_u f_ret_float_u() {
				return (union float_u){1.0};
				}