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llvm-project/clang/test/Driver/arm-target-as-mthumb.s

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[ARM] For assembler files recognize -Xassembler or -Wa, -mthumb The Unified Arm Assembler Language is designed so that the majority of assembler files can be assembled for both Arm and Thumb with the choice made as a compilation option. The way this is done in gcc is to pass -mthumb to the assembler with either -Wa,-mthumb or -Xassembler -mthumb. This change adds support for these options to clang. There is no assembler equivalent of -mno-thumb, -marm or -mno-arm so we don't need to recognize these. Ideally we would do all of the processing in CollectArgsForIntegratedAssembler(). Unfortunately we need to change the triple and at that point it is too late. Instead we look for the option earlier in ComputeLLVMTriple(). Fixes PR34519 Differential Revision: https://reviews.llvm.org/D40127 llvm-svn: 318647
2017-11-20 21:43:55 +08:00
// Make sure -mthumb does not affect assembler triple, but -Wa,-mthumb or
// -Xassembler -mthumb does. Also check that -Wa,-mthumb or -Xassembler -mthumb
// does not affect non assembler files.
// RUN: %clang -target armv7a-linux-gnueabi -### -c -mthumb %s 2>&1 | \
// RUN: FileCheck -check-prefix=TRIPLE-ARM %s
// RUN: %clang -target armv7a-linux-gnueabi -### -c -Wa,-mthumb \
// RUN: %S/Inputs/wildcard1.c 2>&1 | FileCheck -check-prefix=TRIPLE-ARM %s
// TRIPLE-ARM: "-triple" "armv7--linux-gnueabi"
// RUN: %clang -target armv7a-linux-gnueabi -### -c -Wa,-mthumb %s 2>&1 | \
// RUN: FileCheck -check-prefix=TRIPLE-THUMB %s
// RUN: %clang -target armv7a-linux-gnueabi -### -c -Xassembler -mthumb %s \
// RUN: 2>&1 | FileCheck -check-prefix=TRIPLE-THUMB %s
// TRIPLE-THUMB: "-triple" "thumbv7--linux-gnueabi"