rsmith created this revision. rsmith added reviewers: t.p.northover, javed.absar, SjoerdMeijer, pbarrio. Herald added a subscriber: kristof.beyls. Herald added a project: clang.
arm_neon.h produces a large number of errors under -fno-lax-vector-conversions, which disables some deeply dangerous implicit conversions and which we really need to make the default (PR17164). This patch fixes the immediate problem by removing a bunch of incorrect casts generated in the header. But it's only the first part of the problem: the other part is fixing the incorrect expectations in the corresponding CodeGen test files (in particular, in two ~20K line test files). However, I don't want to touch that until I'm confident this change is correct. Repository: rC Clang https://reviews.llvm.org/D61717 Files: test/Headers/arm-neon-header.c test/Sema/aarch64-neon-fp16-ranges.c utils/TableGen/NeonEmitter.cpp Index: utils/TableGen/NeonEmitter.cpp =================================================================== --- utils/TableGen/NeonEmitter.cpp +++ utils/TableGen/NeonEmitter.cpp @@ -1430,7 +1430,7 @@ } // Check if an explicit cast is needed. - if (CastToType.isVector()) { + if (CastToType.isVector() && (LocalCK == ClassB || CastToType.isChar())) { CastToType.makeInteger(8, true); Arg = "(" + CastToType.str() + ")" + Arg; } Index: test/Sema/aarch64-neon-fp16-ranges.c =================================================================== --- test/Sema/aarch64-neon-fp16-ranges.c +++ test/Sema/aarch64-neon-fp16-ranges.c @@ -1,5 +1,5 @@ -// RUN: %clang_cc1 -triple arm64-linux-gnu -fallow-half-arguments-and-returns -target-feature +neon -target-feature +fullfp16 -ffreestanding -fsyntax-only -verify %s -// RUN: %clang_cc1 -triple aarch64-linux-gnu -fallow-half-arguments-and-returns -target-feature +fullfp16 -target-feature +neon -ffreestanding -fsyntax-only -verify %s +// RUN: %clang_cc1 -triple arm64-linux-gnu -fallow-half-arguments-and-returns -target-feature +neon -target-feature +fullfp16 -ffreestanding -fsyntax-only -verify %s -fno-lax-vector-conversions +// RUN: %clang_cc1 -triple aarch64-linux-gnu -fallow-half-arguments-and-returns -target-feature +fullfp16 -target-feature +neon -ffreestanding -fsyntax-only -verify %s -fno-lax-vector-conversions #include <arm_neon.h> #include <arm_fp16.h> Index: test/Headers/arm-neon-header.c =================================================================== --- test/Headers/arm-neon-header.c +++ test/Headers/arm-neon-header.c @@ -2,6 +2,9 @@ // RUN: %clang_cc1 -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -fno-lax-vector-conversions -ffreestanding %s // RUN: %clang_cc1 -x c++ -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -Wvector-conversions -ffreestanding %s +// RUN: %clang_cc1 -triple arm64-linux-gnu -fallow-half-arguments-and-returns -target-feature +neon -target-feature +fullfp16 -ffreestanding -fsyntax-only %s -fno-lax-vector-conversions +// RUN: %clang_cc1 -triple aarch64-linux-gnu -fallow-half-arguments-and-returns -target-feature +fullfp16 -target-feature +neon -ffreestanding -fsyntax-only %s -fno-lax-vector-conversions + // RUN: %clang -fsyntax-only -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c89 -xc %s // RUN: %clang -fsyntax-only -Wall -Werror -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c99 -xc %s // RUN: %clang -fsyntax-only -Wall -Werror -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c11 -xc %s
Index: utils/TableGen/NeonEmitter.cpp =================================================================== --- utils/TableGen/NeonEmitter.cpp +++ utils/TableGen/NeonEmitter.cpp @@ -1430,7 +1430,7 @@ } // Check if an explicit cast is needed. - if (CastToType.isVector()) { + if (CastToType.isVector() && (LocalCK == ClassB || CastToType.isChar())) { CastToType.makeInteger(8, true); Arg = "(" + CastToType.str() + ")" + Arg; } Index: test/Sema/aarch64-neon-fp16-ranges.c =================================================================== --- test/Sema/aarch64-neon-fp16-ranges.c +++ test/Sema/aarch64-neon-fp16-ranges.c @@ -1,5 +1,5 @@ -// RUN: %clang_cc1 -triple arm64-linux-gnu -fallow-half-arguments-and-returns -target-feature +neon -target-feature +fullfp16 -ffreestanding -fsyntax-only -verify %s -// RUN: %clang_cc1 -triple aarch64-linux-gnu -fallow-half-arguments-and-returns -target-feature +fullfp16 -target-feature +neon -ffreestanding -fsyntax-only -verify %s +// RUN: %clang_cc1 -triple arm64-linux-gnu -fallow-half-arguments-and-returns -target-feature +neon -target-feature +fullfp16 -ffreestanding -fsyntax-only -verify %s -fno-lax-vector-conversions +// RUN: %clang_cc1 -triple aarch64-linux-gnu -fallow-half-arguments-and-returns -target-feature +fullfp16 -target-feature +neon -ffreestanding -fsyntax-only -verify %s -fno-lax-vector-conversions #include <arm_neon.h> #include <arm_fp16.h> Index: test/Headers/arm-neon-header.c =================================================================== --- test/Headers/arm-neon-header.c +++ test/Headers/arm-neon-header.c @@ -2,6 +2,9 @@ // RUN: %clang_cc1 -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -fno-lax-vector-conversions -ffreestanding %s // RUN: %clang_cc1 -x c++ -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -Wvector-conversions -ffreestanding %s +// RUN: %clang_cc1 -triple arm64-linux-gnu -fallow-half-arguments-and-returns -target-feature +neon -target-feature +fullfp16 -ffreestanding -fsyntax-only %s -fno-lax-vector-conversions +// RUN: %clang_cc1 -triple aarch64-linux-gnu -fallow-half-arguments-and-returns -target-feature +fullfp16 -target-feature +neon -ffreestanding -fsyntax-only %s -fno-lax-vector-conversions + // RUN: %clang -fsyntax-only -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c89 -xc %s // RUN: %clang -fsyntax-only -Wall -Werror -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c99 -xc %s // RUN: %clang -fsyntax-only -Wall -Werror -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c11 -xc %s
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