Bill Wendling 37b52ee6d9 Micro-optimization: ... This code: float floatingPointComparison(float x, float y) { double product = (double)x * y; if (product == 0.0) return product; return product - 1.0; } produces this: _floatingPointComparison: 0000000000000000 cvtss2sd %xmm1,%xmm1 0000000000000004 cvtss2sd %xmm0,%xmm0 0000000000000008 mulsd %xmm1,%xmm0 000000000000000c pxor %xmm1,%xmm1 0000000000000010 ucomisd %xmm1,%xmm0 0000000000000014 jne 0x00000004 0000000000000016 jp 0x00000002 0000000000000018 jmp 0x00000008 000000000000001a addsd 0x00000006(%rip),%xmm0 0000000000000022 cvtsd2ss %xmm0,%xmm0 0000000000000026 ret The "jne/jp/jmp" sequence can be reduced to this instead: _floatingPointComparison: 0000000000000000 cvtss2sd %xmm1,%xmm1 0000000000000004 cvtss2sd %xmm0,%xmm0 0000000000000008 mulsd %xmm1,%xmm0 000000000000000c pxor %xmm1,%xmm1 0000000000000010 ucomisd %xmm1,%xmm0 0000000000000014 jp 0x00000002 0000000000000016 je 0x00000008 0000000000000018 addsd 0x00000006(%rip),%xmm0 0000000000000020 cvtsd2ss %xmm0,%xmm0 0000000000000024 ret for a savings of 2 bytes. This xform can happen when we recognize that jne and jp jump to the same "true" MBB, the unconditional jump would jump to the "false" MBB, and the "true" branch is the fall-through MBB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97766 91177308-0d34-0410-b5e6-96231b3b80d8		2010-03-05 00:24:26 +00:00
..
Analysis	remove andersen's tests.	2010-03-01 20:23:15 +00:00
Archive
Assembler	Add support for a union type in LLVM IR. Patch by Talin!	2010-02-12 20:49:41 +00:00
Bindings/Ocaml	Expose the rest of the llvm-c scalar opts to ocaml.	2010-03-03 23:51:34 +00:00
Bitcode
BugPoint
CodeGen	Micro-optimization:	2010-03-05 00:24:26 +00:00
DebugInfo	Remove test to check bugfix in handing debug info for global variables using intrinsics. Now, debug info for global variable is encoded using metadata. The old code path is now history and there is no need to have a test to check a bug fix in old code path.	2010-03-01 19:09:55 +00:00
ExecutionEngine	Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,	2010-03-02 01:11:08 +00:00
Feature	Add support for a union type in LLVM IR. Patch by Talin!	2010-02-12 20:49:41 +00:00
FrontendAda
FrontendC	Eliminate llvmgcc_version testing variable.	2010-02-23 07:56:28 +00:00
FrontendC++	Ignore target dependent value in grep search.	2010-02-18 19:52:12 +00:00
FrontendFortran
FrontendObjC	new test case for r96974.	2010-02-23 19:37:40 +00:00
FrontendObjC++
Integer
lib	Eliminate llvmgcc_version testing variable.	2010-02-23 07:56:28 +00:00
Linker
LLVMC	Update the test suite.	2010-02-23 09:04:51 +00:00
MC	This is a patch to the assembler frontend to detect when aligning a text	2010-02-25 18:46:04 +00:00
Other	stop using anders-aa	2010-03-01 20:24:50 +00:00
Scripts
TableGen
Transforms	Make the 'icmp pred trunc(ext(X)), CST --> icmp pred X, ext(trunc(CST))'	2010-03-04 06:54:10 +00:00
Unit	Try r96559 for the third time. This time the shared library is only built if	2010-02-25 06:34:33 +00:00
Verifier
CMakeLists.txt
lit.cfg	Teach lit to honor conditional directives. The syntax is:	2010-03-04 09:36:50 +00:00
lit.site.cfg.in
Makefile	Try r96559 for the third time. This time the shared library is only built if	2010-02-25 06:34:33 +00:00
Makefile.tests	Switch .bc/.ll Makefile rules to use LLVM{CC,CXX} instead of LLVMG{CC,XX}	2010-02-23 10:28:06 +00:00
site.exp.in	Eliminate llvmgcc_version testing variable.	2010-02-23 07:56:28 +00:00
TestRunner.sh