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LLVM IR recently added a Type parameter to the byval Attribute, so that
when pointers become opaque and no longer have an element type the
information will still be present in IR.
For now the Type parameter is optional (which is why Clang didn't need
this change at the time), but it will become mandatory soon.
llvm-svn: 362652
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This adds support for the MCU psABI in a way different from r251223 and r251224,
basically reverting most of these two patches. The problem with the approach
taken in r251223/4 is that it only handled libcalls that originated from the backend.
However, the mid-end also inserts quite a few libcalls and assumes these use the
platform's default calling convention.
The previous patch tried to insert inregs when necessary both in the FE and,
somewhat hackily, in the CG. Instead, we now define a new default calling convention
for the MCU, which doesn't use inreg marking at all, similarly to what x86-64 does.
Differential Revision: http://reviews.llvm.org/D15055
llvm-svn: 256495
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This patch fixes one more thing in MCU psABI support: LongDoubleWidth should be set to 64.
Differential Revision: http://reviews.llvm.org/D14285
llvm-svn: 252156
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This patch implements two things in front-end for MCU psABI support:
1) "long double type is the same as double."
2) "New predefined C/C++ pre-processor symbols: iamcu and iamcu__.
Differential Revision: http://reviews.llvm.org/D14205
llvm-svn: 251786
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The MCU psABI calling convention is somewhat, but not quite, like -mregparm 3.
In particular, the rules involving structs are different.
Differential Revision: http://reviews.llvm.org/D13978
llvm-svn: 251224
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