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[clang][ARM] Add name-mangling test for direct __fp16 arguments. 

`clang/test/CodeGenCXX/fp16-mangle.cpp` tests pointers to __fp16, but
if you give the `-fallow-half-arguments-and-returns` option, then
clang can also leave an __fp16 unmodified as a function argument or
return type. This regression test checks the name-mangling of that.

Reviewed By: miyuki

Differential Revision: https://reviews.llvm.org/D85010
This commit is contained in:
Simon Tatham 2020-08-03 13:30:48 +01:00
parent 18279a54b5
commit ed0e4c70c9
1 changed files with 16 additions and 0 deletions
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clang/test/CodeGenCXX/fp16-mangle-arg-return.cpp Normal file
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// RUN: %clang_cc1 -emit-llvm -o - -triple arm-arm-none-eabi -fallow-half-arguments-and-returns %s | FileCheck %s
// RUN: %clang_cc1 -emit-llvm -o - -triple aarch64-arm-none-eabi -fallow-half-arguments-and-returns %s | FileCheck %s
// Test name-mangling of __fp16 passed directly as a function argument
// (when that is permitted).
// CHECK: define {{.*}}void @_Z13fp16_argumentDh(half %{{.*}})
void fp16_argument(__fp16 arg) {}
// Test name-mangling of __fp16 as a return type. The return type of
// fp16_return itself isn't mentioned in the mangled name, so to test
// this, we have to pass it a function pointer and make __fp16 the
// return type of that.
// CHECK: define {{.*}}void @_Z11fp16_returnPFDhvE(half ()* %{{.*}})
void fp16_return(__fp16 (*func)(void)) {}