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llvm-project/clang/test/CodeGen/wchar-size.c

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CodeGenModule: Always output wchar_size, check LLVM assumptions. Re-commit r303463 now that LLVM is fixed and adjust some lit tests. llvm::TargetLibraryInfo needs to know the size of wchar_t to work on functions like `wcslen`. This patch changes clang to always emit the wchar_size module flag (it would only do so for ARM previously). This also adds an `assert()` to ensure the LLVM defaults based on the target triple are in sync with clang. Differential Revision: https://reviews.llvm.org/D32982 llvm-svn: 303478
2017-05-20 09:29:55 +08:00
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -o - %s | FileCheck %s -check-prefix=LONG-WCHAR
// RUN: %clang_cc1 -triple x86_64-unknown-windows-msvc -emit-llvm -o - %s | FileCheck %s -check-prefix=SHORT-WCHAR
Driver: hoist the `wchar_t` handling to the driver Move the logic for determining the `wchar_t` type information into the driver. Rather than passing the single bit of information of `-fshort-wchar` indicate to the frontend the desired type of `wchar_t` through a new `-cc1` option of `-fwchar-type` and indicate the signedness through `-f{,no-}signed-wchar`. This replicates the current logic which was spread throughout Basic into the `RenderCharacterOptions`. Most of the changes to the tests are to ensure that the frontend uses the correct type. Add a new test set under `test/Driver/wchar_t.c` to ensure that we calculate the proper types for the various cases. llvm-svn: 315126
2017-10-07 07:09:55 +08:00
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -o - -fwchar-type=short -fno-signed-wchar %s | FileCheck %s -check-prefix=SHORT-WCHAR
CodeGenModule: Always output wchar_size, check LLVM assumptions. Re-commit r303463 now that LLVM is fixed and adjust some lit tests. llvm::TargetLibraryInfo needs to know the size of wchar_t to work on functions like `wcslen`. This patch changes clang to always emit the wchar_size module flag (it would only do so for ARM previously). This also adds an `assert()` to ensure the LLVM defaults based on the target triple are in sync with clang. Differential Revision: https://reviews.llvm.org/D32982 llvm-svn: 303478
2017-05-20 09:29:55 +08:00
// Note: -fno-short-wchar implies the target default is used; so there is no
// need to test this separately here.
// LONG-WCHAR: !{{[0-9]+}} = !{i32 {{[0-9]+}}, !"wchar_size", i32 4}
// SHORT-WCHAR: !{{[0-9]+}} = !{i32 {{[0-9]+}}, !"wchar_size", i32 2}