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Mirror of https://github.com/RPCS3/llvm-mirror
e95528845d
Almost all immediates in PowerPC assembly (both 32-bit and 64-bit) are signed numbers, and it is important that we print them as such. To make sure that happens, we change PPCTargetLowering::LowerAsmOperandForConstraint so that it does all intermediate checks on a signed-extended int64_t value, and then creates the resulting target constant using MVT::i64. This will ensure that all negative values are printed as negative values (mirroring what is done in other backends to achieve the same sign-extension effect). This came up in the context of inline assembly like this: "add%I2 %0,%0,%2", ..., "Ir"(-1ll) where we used to print: addi 3,3,4294967295 and gcc would print: addi 3,3,-1 and gas accepts both forms, but our builtin assembler (correctly) does not. Now we print -1 like gcc does. While here, I replaced a bunch of custom integer checks with isInt<16> and friends from MathExtras.h. Thanks to Paul Hargrove for the bug report. llvm-svn: 223220 |
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Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for the Low Level Virtual Machine, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you're writing a package for LLVM, see docs/Packaging.rst for our suggestions.