a742511cbe
As reported in https://github.com/llvm/llvm-project/issues/58929, Clang currently differs from GCC in the handling of empty structs. This commit adds some test coverage for the handling of such structs. A follow-up patch implements a fix to match g++. Differential Revision: https://reviews.llvm.org/D142326
174 lines
6.2 KiB
C
174 lines
6.2 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --function-signature --full-function-signature --filter "^define |^entry:"
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// RUN: %clang_cc1 -triple riscv32 -target-feature +f -target-abi ilp32f -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-C,CHECK32-C %s
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// RUN: %clang_cc1 -triple riscv32 -target-feature +f -target-feature +d -target-abi ilp32d -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-C,CHECK32-C %s
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// RUN: %clang_cc1 -triple riscv64 -target-feature +f -target-abi lp64f -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-C,CHECK64-C %s
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// RUN: %clang_cc1 -triple riscv64 -target-feature +f -target-feature +d -target-abi lp64d -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-C,CHECK64-C %s
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// RUN: %clang_cc1 -x c++ -triple riscv32 -target-feature +f -target-abi ilp32f -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-CXX,CHECK32-CXX %s
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// RUN: %clang_cc1 -x c++ -triple riscv32 -target-feature +f -target-feature +d -target-abi ilp32d -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-CXX,CHECK32-CXX %s
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// RUN: %clang_cc1 -x c++ -triple riscv64 -target-feature +f -target-abi lp64f -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-CXX,CHECK64-CXX %s
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// RUN: %clang_cc1 -x c++ -triple riscv64 -target-feature +f -target-feature +d -target-abi lp64d -emit-llvm %s -o - \
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// RUN: | FileCheck -check-prefixes=CHECK-CXX,CHECK64-CXX %s
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#include <stdint.h>
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// Fields containing empty structs or unions are ignored when flattening
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// structs for the hard FP ABIs, even in C++.
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// FIXME: This isn't currently respected.
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struct empty { struct { struct { } e; }; };
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struct s1 { struct empty e; float f; };
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// CHECK-C-LABEL: define dso_local float @test_s1
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// CHECK-C-SAME: (float [[TMP0:%.*]]) #[[ATTR0:[0-9]+]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local [2 x i32] @_Z7test_s12s1
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// CHECK32-CXX-SAME: ([2 x i32] [[A_COERCE:%.*]]) #[[ATTR0:[0-9]+]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local i64 @_Z7test_s12s1
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// CHECK64-CXX-SAME: (i64 [[A_COERCE:%.*]]) #[[ATTR0:[0-9]+]] {
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// CHECK64-CXX: entry:
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//
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struct s1 test_s1(struct s1 a) {
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return a;
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}
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struct s2 { struct empty e; int32_t i; float f; };
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// CHECK-C-LABEL: define dso_local { i32, float } @test_s2
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// CHECK-C-SAME: (i32 [[TMP0:%.*]], float [[TMP1:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local void @_Z7test_s22s2
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// CHECK32-CXX-SAME: (ptr noalias sret([[STRUCT_S2:%.*]]) align 4 [[AGG_RESULT:%.*]], ptr noundef [[A:%.*]]) #[[ATTR0]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local [2 x i64] @_Z7test_s22s2
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// CHECK64-CXX-SAME: ([2 x i64] [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK64-CXX: entry:
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//
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struct s2 test_s2(struct s2 a) {
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return a;
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}
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struct s3 { struct empty e; float f; float g; };
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// CHECK-C-LABEL: define dso_local { float, float } @test_s3
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// CHECK-C-SAME: (float [[TMP0:%.*]], float [[TMP1:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local void @_Z7test_s32s3
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// CHECK32-CXX-SAME: (ptr noalias sret([[STRUCT_S3:%.*]]) align 4 [[AGG_RESULT:%.*]], ptr noundef [[A:%.*]]) #[[ATTR0]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local [2 x i64] @_Z7test_s32s3
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// CHECK64-CXX-SAME: ([2 x i64] [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK64-CXX: entry:
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//
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struct s3 test_s3(struct s3 a) {
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return a;
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}
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struct s4 { struct empty e; float __complex__ c; };
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// CHECK-C-LABEL: define dso_local { float, float } @test_s4
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// CHECK-C-SAME: (float [[TMP0:%.*]], float [[TMP1:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local void @_Z7test_s42s4
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// CHECK32-CXX-SAME: (ptr noalias sret([[STRUCT_S4:%.*]]) align 4 [[AGG_RESULT:%.*]], ptr noundef [[A:%.*]]) #[[ATTR0]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local [2 x i64] @_Z7test_s42s4
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// CHECK64-CXX-SAME: ([2 x i64] [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK64-CXX: entry:
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//
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struct s4 test_s4(struct s4 a) {
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return a;
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}
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// An array of empty fields isn't ignored in C++ (this isn't explicit in the
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// psABI, but matches observed g++ behaviour).
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struct s5 { struct empty e[1]; float f; };
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// CHECK-C-LABEL: define dso_local float @test_s5
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// CHECK-C-SAME: (float [[TMP0:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local [2 x i32] @_Z7test_s52s5
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// CHECK32-CXX-SAME: ([2 x i32] [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local i64 @_Z7test_s52s5
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// CHECK64-CXX-SAME: (i64 [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK64-CXX: entry:
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//
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struct s5 test_s5(struct s5 a) {
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return a;
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}
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struct empty_arr { struct { struct { } e[1]; }; };
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struct s6 { struct empty_arr e; float f; };
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// CHECK-C-LABEL: define dso_local float @test_s6
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// CHECK-C-SAME: (float [[TMP0:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local [2 x i32] @_Z7test_s62s6
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// CHECK32-CXX-SAME: ([2 x i32] [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local i64 @_Z7test_s62s6
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// CHECK64-CXX-SAME: (i64 [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK64-CXX: entry:
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//
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struct s6 test_s6(struct s6 a) {
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return a;
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}
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struct s7 { struct empty e[0]; float f; };
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// CHECK-C-LABEL: define dso_local float @test_s7
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// CHECK-C-SAME: (float [[TMP0:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK-CXX-LABEL: define dso_local float @_Z7test_s72s7
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// CHECK-CXX-SAME: (float [[TMP0:%.*]]) #[[ATTR0:[0-9]+]] {
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// CHECK-CXX: entry:
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//
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struct s7 test_s7(struct s7 a) {
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return a;
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}
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struct empty_arr0 { struct { struct { } e[0]; }; };
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struct s8 { struct empty_arr0 e; float f; };
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// CHECK-C-LABEL: define dso_local float @test_s8
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// CHECK-C-SAME: (float [[TMP0:%.*]]) #[[ATTR0]] {
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// CHECK-C: entry:
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//
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// CHECK32-CXX-LABEL: define dso_local i32 @_Z7test_s82s8
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// CHECK32-CXX-SAME: (i32 [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK32-CXX: entry:
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//
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// CHECK64-CXX-LABEL: define dso_local i64 @_Z7test_s82s8
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// CHECK64-CXX-SAME: (i64 [[A_COERCE:%.*]]) #[[ATTR0]] {
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// CHECK64-CXX: entry:
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//
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struct s8 test_s8(struct s8 a) {
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return a;
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}
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//// NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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// CHECK32-C: {{.*}}
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// CHECK64-C: {{.*}}
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