For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
Commit 6b1341eb fixed alignment for 128-bit FP types on PowerPC.
However, the quadword alignment adjustment shouldn't be applied to IBM
extended double (ppc_fp128 in IR) values.
Reviewed By: jsji
Differential Revision: https://reviews.llvm.org/D92278
According to ELF v2 ABI, both IEEE 128-bit and IBM extended floating
point variables should be quad-word (16 bytes) aligned. Previously, only
vector types are considered aligned as quad-word on PowerPC.
This patch will fix incorrectness of IEEE 128-bit float argument in
va_arg cases.
Reviewed By: rjmccall
Differential Revision: https://reviews.llvm.org/D91596
Fangrui Song