b637148ecb
mangling support for non-type template parameters of class type and template parameter objects. The Itanium side of this follows the approach I proposed in https://github.com/itanium-cxx-abi/cxx-abi/issues/47 on 2020-09-06. The MSVC side of this was determined empirically by observing MSVC's output. Differential Revision: https://reviews.llvm.org/D89998
20 lines
1.2 KiB
C++
20 lines
1.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++20 %s -emit-llvm -o - | FileCheck %s --check-prefixes=ITANIUM,CHECK
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// RUN: %clang_cc1 -triple x86_64-windows -std=c++20 %s -emit-llvm -o - | FileCheck %s --check-prefixes=MSABI,CHECK
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struct S { char buf[32]; };
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template<S s> constexpr const char *begin() { return s.buf; }
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template<S s> constexpr const char *end() { return s.buf + __builtin_strlen(s.buf); }
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// ITANIUM: [[HELLO:@_ZTAXtl1StlA32_cLc104ELc101ELc108ELc108ELc111ELc32ELc119ELc111ELc114ELc108ELc100EEEE]]
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// MSABI: [[HELLO:@"[?][?]__N2US@@3D0GI@@0GF@@0GM@@0GM@@0GP@@0CA@@0HH@@0GP@@0HC@@0GM@@0GE@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@0A@@@@@"]]
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// CHECK-SAME: = linkonce_odr constant { <{ [11 x i8], [21 x i8] }> } { <{ [11 x i8], [21 x i8] }> <{ [11 x i8] c"hello world", [21 x i8] zeroinitializer }> }, comdat
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// ITANIUM: @p
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// MSABI: @"?p@@3PEBDEB"
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// CHECK-SAME: global i8* getelementptr inbounds ({{.*}}* [[HELLO]], i32 0, i32 0, i32 0, i32 0)
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const char *p = begin<S{"hello world"}>();
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// ITANIUM: @q
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// MSABI: @"?q@@3PEBDEB"
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// CHECK-SAME: global i8* getelementptr (i8, i8* getelementptr inbounds ({{.*}}* [[HELLO]], i32 0, i32 0, i32 0, i32 0), i64 11)
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const char *q = end<S{"hello world"}>();
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