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.
58 lines
5.4 KiB
C++
58 lines
5.4 KiB
C++
// RUN: %clang_cc1 -triple s390x-linux-gnu -emit-llvm -x c++ -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple s390x-linux-gnu -emit-llvm -x c++ -o - %s -mfloat-abi soft \
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// RUN: | FileCheck %s --check-prefix=SOFT-FLOAT
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// Verify that class types are also recognized as float-like aggregate types
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class agg_float_class { float a; };
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class agg_float_class pass_agg_float_class(class agg_float_class arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z20pass_agg_float_class15agg_float_class(ptr dead_on_unwind noalias writable sret(%class.agg_float_class) align 4 %{{.*}}, float %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z20pass_agg_float_class15agg_float_class(ptr dead_on_unwind noalias writable sret(%class.agg_float_class) align 4 %{{.*}}, i32 %{{.*}})
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class agg_double_class { double a; };
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class agg_double_class pass_agg_double_class(class agg_double_class arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z21pass_agg_double_class16agg_double_class(ptr dead_on_unwind noalias writable sret(%class.agg_double_class) align 8 %{{.*}}, double %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z21pass_agg_double_class16agg_double_class(ptr dead_on_unwind noalias writable sret(%class.agg_double_class) align 8 %{{.*}}, i64 %{{.*}})
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// This structure is passed in a GPR in C++ (and C, checked in systemz-abi.c).
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struct agg_float_cpp { float a; int : 0; };
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struct agg_float_cpp pass_agg_float_cpp(struct agg_float_cpp arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z18pass_agg_float_cpp13agg_float_cpp(ptr dead_on_unwind noalias writable sret(%struct.agg_float_cpp) align 4 %{{.*}}, i32 %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z18pass_agg_float_cpp13agg_float_cpp(ptr dead_on_unwind noalias writable sret(%struct.agg_float_cpp) align 4 %{{.*}}, i32 %{{.*}})
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// A field member of empty class type in C++ makes the record nonhomogeneous,
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// unless it is marked as [[no_unique_address]]. This does not apply to arrays.
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struct empty { };
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struct agg_nofloat_empty { float a; empty dummy; };
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struct agg_nofloat_empty pass_agg_nofloat_empty(struct agg_nofloat_empty arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z22pass_agg_nofloat_empty17agg_nofloat_empty(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_empty) align 4 %{{.*}}, i64 %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z22pass_agg_nofloat_empty17agg_nofloat_empty(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_empty) align 4 %{{.*}}, i64 %{{.*}})
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struct agg_float_empty { float a; [[no_unique_address]] empty dummy; };
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struct agg_float_empty pass_agg_float_empty(struct agg_float_empty arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z20pass_agg_float_empty15agg_float_empty(ptr dead_on_unwind noalias writable sret(%struct.agg_float_empty) align 4 %{{.*}}, float %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z20pass_agg_float_empty15agg_float_empty(ptr dead_on_unwind noalias writable sret(%struct.agg_float_empty) align 4 %{{.*}}, i32 %{{.*}})
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struct agg_nofloat_emptyarray { float a; [[no_unique_address]] empty dummy[3]; };
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struct agg_nofloat_emptyarray pass_agg_nofloat_emptyarray(struct agg_nofloat_emptyarray arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z27pass_agg_nofloat_emptyarray22agg_nofloat_emptyarray(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_emptyarray) align 4 %{{.*}}, i64 %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z27pass_agg_nofloat_emptyarray22agg_nofloat_emptyarray(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_emptyarray) align 4 %{{.*}}, i64 %{{.*}})
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// And likewise for members of base classes.
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struct noemptybase { empty dummy; };
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struct agg_nofloat_emptybase : noemptybase { float a; };
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struct agg_nofloat_emptybase pass_agg_nofloat_emptybase(struct agg_nofloat_emptybase arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z26pass_agg_nofloat_emptybase21agg_nofloat_emptybase(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_emptybase) align 4 %{{.*}}, i64 %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z26pass_agg_nofloat_emptybase21agg_nofloat_emptybase(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_emptybase) align 4 %{{.*}}, i64 %{{.*}})
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struct emptybase { [[no_unique_address]] empty dummy; };
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struct agg_float_emptybase : emptybase { float a; };
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struct agg_float_emptybase pass_agg_float_emptybase(struct agg_float_emptybase arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z24pass_agg_float_emptybase19agg_float_emptybase(ptr dead_on_unwind noalias writable sret(%struct.agg_float_emptybase) align 4 %{{.*}}, float %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z24pass_agg_float_emptybase19agg_float_emptybase(ptr dead_on_unwind noalias writable sret(%struct.agg_float_emptybase) align 4 %{{.*}}, i32 %{{.*}})
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struct noemptybasearray { [[no_unique_address]] empty dummy[3]; };
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struct agg_nofloat_emptybasearray : noemptybasearray { float a; };
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struct agg_nofloat_emptybasearray pass_agg_nofloat_emptybasearray(struct agg_nofloat_emptybasearray arg) { return arg; }
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// CHECK-LABEL: define{{.*}} void @_Z31pass_agg_nofloat_emptybasearray26agg_nofloat_emptybasearray(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_emptybasearray) align 4 %{{.*}}, i64 %{{.*}})
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// SOFT-FLOAT-LABEL: define{{.*}} void @_Z31pass_agg_nofloat_emptybasearray26agg_nofloat_emptybasearray(ptr dead_on_unwind noalias writable sret(%struct.agg_nofloat_emptybasearray) align 4 %{{.*}}, i64 %{{.*}})
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