Chris Lattner a92ff91a96 implement enough of the memset inference algorithm to recognize and insert ... memsets. This is still missing one important validity check, but this is enough to compile stuff like this: void test0(std::vector<char> &X) { for (std::vector<char>::iterator I = X.begin(), E = X.end(); I != E; ++I) *I = 0; } void test1(std::vector<int> &X) { for (long i = 0, e = X.size(); i != e; ++i) X[i] = 0x01010101; } With: $ clang t.cpp -S -o - -O2 -emit-llvm | opt -loop-idiom | opt -O3 | llc to: __Z5test0RSt6vectorIcSaIcEE: ## @_Z5test0RSt6vectorIcSaIcEE ## BB#0: ## %entry subq $8, %rsp movq (%rdi), %rax movq 8(%rdi), %rsi cmpq %rsi, %rax je LBB0_2 ## BB#1: ## %bb.nph subq %rax, %rsi movq %rax, %rdi callq ___bzero LBB0_2: ## %for.end addq $8, %rsp ret ... __Z5test1RSt6vectorIiSaIiEE: ## @_Z5test1RSt6vectorIiSaIiEE ## BB#0: ## %entry subq $8, %rsp movq (%rdi), %rax movq 8(%rdi), %rdx subq %rax, %rdx cmpq $4, %rdx jb LBB1_2 ## BB#1: ## %for.body.preheader andq $-4, %rdx movl $1, %esi movq %rax, %rdi callq _memset LBB1_2: ## %for.end addq $8, %rsp ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122573 91177308-0d34-0410-b5e6-96231b3b80d8		2010-12-26 23:42:51 +00:00
..
Analysis	-enable-tbaa is on by default now.	2010-12-16 02:53:48 +00:00
Archive	Revert test/Archive/check_binary_output.ll". It fails on a buildbot.	2010-12-07 05:57:02 +00:00
Assembler	Fix PR 4170 by having ExtractValueInst::getIndexedType() reject out-of-bounds indexing.	2010-12-05 20:50:26 +00:00
Bindings/Ocaml	XFAIL vg_leak the new test as the rest.	2010-12-23 21:22:09 +00:00
Bitcode	Testcase for PR8494 (invalid bitcode crashing the bitcode reader).	2010-10-28 15:57:30 +00:00
BugPoint	test: Check the feature 'loadable_module' with load modules in %llvmshlibdir.	2010-11-29 07:58:32 +00:00
CodeGen	Radar 8803471: Fix expansion of ARM BCCi64 pseudo instructions.	2010-12-23 22:45:49 +00:00
DebugInfo	Hide tests, that check .loc, .file in output assembly, from darwin9 buildbot.	2010-12-02 23:29:58 +00:00
ExecutionEngine	XFAIL for now. If someone with access to an ARM/Linux host wants to have a look	2010-12-02 20:20:32 +00:00
Feature	test: Check the feature 'loadable_module' with load modules in %llvmshlibdir.	2010-11-29 07:58:32 +00:00
FrontendAda	Adjust this test for the fact that the stores are no longer	2010-12-02 20:56:51 +00:00
FrontendC	Test case for r120740. Radar 8712503.	2010-12-02 21:25:55 +00:00
FrontendC++	This test dates from the time when llvm-gcc had problems if two types were	2010-12-02 18:19:23 +00:00
FrontendFortran	Use -S rather than -c for the benefit of dragonegg.	2010-11-25 21:41:35 +00:00
FrontendObjC	Remove explicit uses of -emit-llvm, the test infrastructure adds it	2010-11-25 21:46:07 +00:00
FrontendObjC++	Remove explicit uses of -emit-llvm, the test infrastructure adds it	2010-11-25 21:48:20 +00:00
Integer	we are past the point where these tests are useful.	2010-09-02 22:32:02 +00:00
lib	Use LLVMCC_EMITIR_FLAG rather than hard-coding "-emit-llvm".	2010-11-25 21:19:52 +00:00
Linker	Fix PR8300 by remembering to keep the bitcast in all cases.	2010-10-19 02:02:57 +00:00
LLVMC	Remove -llvmc-temp-hack from tblgen.	2010-10-23 07:32:53 +00:00
MC	Add support for @note. Patch by Jörg Sonnenberger.	2010-12-26 21:30:59 +00:00
Other	test/Other/close-stderr.ll: Require the feature 'shell'. It is not executable on Win32 but it is executable on MSYS-bash.	2010-12-07 02:43:58 +00:00
Scripts	Print all 64bits for st_value and st_size. Adjust tests accordingly.	2010-12-20 20:49:43 +00:00
TableGen	Add support for using the `!if' operator when initializing variables:	2010-12-13 01:46:19 +00:00
Transforms	implement enough of the memset inference algorithm to recognize and insert	2010-12-26 23:42:51 +00:00
Unit	Test: Fix Support.Path and _all_ of the unittest death tests. GetTempPath defaults to \Windows\.	2010-12-07 01:23:49 +00:00
Verifier	Reject unrepresentable pointer types in intrinsics. Fixes PR7316.	2010-08-08 06:12:09 +00:00
CMakeLists.txt	macho-dump: Fix CMake build, following up to r121466.	2010-12-10 09:18:26 +00:00
lit.cfg	Revert 122341. It breaks some darwin tests.	2010-12-21 17:25:43 +00:00
lit.site.cfg.in	test: Add the new feature 'loadable_module'.	2010-11-29 00:20:09 +00:00
Makefile	test: Use $SharedLibDir for loadable modules. On Cygming, loadable modules are not in lib/ but bin.	2010-11-29 00:20:21 +00:00
Makefile.tests
site.exp.in	test: Use $SharedLibDir for loadable modules. On Cygming, loadable modules are not in lib/ but bin.	2010-11-29 00:20:21 +00:00
TestRunner.sh	Use exec.	2010-08-29 14:49:00 +00:00