hanchenye-llvm-project/llvm
Chris Lattner f2ee88eb5a Improve codegen of long == and != comparisons against constants. Before,
comparing a long against zero got us this:

        sub %ESP, 8
        mov DWORD PTR [%ESP + 4], %ESI
        mov DWORD PTR [%ESP], %EDI
        mov %EAX, DWORD PTR [%ESP + 12]
        mov %EDX, DWORD PTR [%ESP + 16]
        mov %ECX, 0
        mov %ESI, 0
        mov %EDI, %EAX
        xor %EDI, %ECX
        mov %ECX, %EDX
        xor %ECX, %ESI
        or %EDI, %ECX
        sete %CL
        test %CL, %CL
        je .LBB2 # PC rel: F

Now it gets us this:

        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %ECX, %EAX
        or %ECX, %EDX
        sete %CL
        test %CL, %CL
        je .LBB2 # PC rel: F

llvm-svn: 12696
2004-04-06 16:02:27 +00:00
..
autoconf
docs
include
lib Improve codegen of long == and != comparisons against constants. Before, 2004-04-06 16:02:27 +00:00
projects
runtime
test
tools
utils
.cvsignore
CREDITS.TXT
LICENSE.TXT
Makefile
Makefile.common
Makefile.config.in
Makefile.rules
README.txt
configure
llvm.spec

README.txt

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