mirror of
https://github.com/RPCSX/llvm.git
synced 2025-01-19 02:42:58 +00:00
150f12af7f
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) {
b.j += x;
}
to:
plus2:
mov %EAX, DWORD PTR [b]
mov %ECX, %EAX
and %ECX, 131008
mov %EDX, DWORD PTR [%ESP + 4]
shl %EDX, 6
add %EDX, %ECX
and %EDX, 131008
and %EAX, -131009
or %EDX, %EAX
mov DWORD PTR [b], %EDX
ret
instead of:
plus2:
mov %EAX, DWORD PTR [b]
mov %ECX, %EAX
shr %ECX, 6
and %ECX, 2047
add %ECX, DWORD PTR [%ESP + 4]
shl %ECX, 6
and %ECX, 131008
and %EAX, -131009
or %ECX, %EAX
mov DWORD PTR [b], %ECX
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23385 91177308-0d34-0410-b5e6-96231b3b80d8
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 HTML documentation provided in docs/index.html for further assistance with LLVM.