Evan Cheng 98819c9d1e For something like ... uint32_t hi(uint64_t res) { uint_32t hi = res >> 32; return !hi; } llvm IR looks like this: define i32 @hi(i64 %res) nounwind uwtable ssp { entry: %lnot = icmp ult i64 %res, 4294967296 %lnot.ext = zext i1 %lnot to i32 ret i32 %lnot.ext } The optimizer has optimize away the right shift and truncate but the resulting constant is too large to fit in the 32-bit immediate field. The resulting x86 code is worse as a result: movabsq $4294967296, %rax ## imm = 0x100000000 cmpq %rax, %rdi sbbl %eax, %eax andl $1, %eax This patch teaches the x86 lowering code to handle ult against a large immediate with trailing zeros. It will issue a right shift and a truncate followed by a comparison against a shifted immediate. shrq $32, %rdi testl %edi, %edi sete %al movzbl %al, %eax It also handles a ugt comparison against a large immediate with trailing bits set. i.e. X > 0x0ffffffff -> (X >> 32) >= 1 rdar://11866926 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160312 91177308-0d34-0410-b5e6-96231b3b80d8		2012-07-16 19:35:43 +00:00
..
Analysis	Fix the remaining TCL-style quotes found in the testsuite. This is	2012-07-02 19:09:46 +00:00
Archive	Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.	2012-02-16 06:28:33 +00:00
Assembler	Fix the remaining TCL-style quotes found in the testsuite. This is	2012-07-02 19:09:46 +00:00
Bindings/Ocaml	Fix the remaining TCL-style quotes found in the testsuite. This is	2012-07-02 19:09:46 +00:00
Bitcode	This is one of the first steps at moving to replace target-dependent	2012-07-13 23:25:25 +00:00
BugPoint	Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.	2012-02-16 06:28:33 +00:00
CodeGen	For something like	2012-07-16 19:35:43 +00:00
DebugInfo	The end of the prologue should be marked with is_stmt.	2012-07-12 23:30:25 +00:00
ExecutionEngine	Add Mips to the list of target architectures for the MCJIT tests.	2012-06-21 20:23:32 +00:00
Feature	Convert the uses of '|&' to use '2>&1 |' instead, which works on old	2012-07-02 18:37:59 +00:00
Instrumentation	[asan] refactor instrumentation to allow merging the crash callbacks (not fully implemented yet, no functionality change except the BB order)	2012-07-16 16:15:40 +00:00
Integer	Convert all tests using TCL-style quoting to use shell-style quoting.	2012-07-02 12:47:22 +00:00
Linker	Convert the uses of '|&' to use '2>&1 |' instead, which works on old	2012-07-02 18:37:59 +00:00
MC	Doubleword Shift Left Logical Plus 32	2012-07-16 15:14:51 +00:00
Object	Add relocation types for Hexagon processor; patch by Sidney Manning <sidneym@codeaurora.org>	2012-06-23 14:46:18 +00:00
Other	Fix the remaining TCL-style quotes found in the testsuite. This is	2012-07-02 19:09:46 +00:00
Scripts	This allows hello world to be compiled for Mips 64 direct object.	2012-06-27 22:48:25 +00:00
TableGen	Convert all tests using TCL-style quoting to use shell-style quoting.	2012-07-02 12:47:22 +00:00
Transforms	LSR Fix: check SCEV expression safety before expansion.	2012-07-13 23:33:10 +00:00
Unit
Verifier	Fix the remaining TCL-style quotes found in the testsuite. This is	2012-07-02 19:09:46 +00:00
YAMLParser	Convert the uses of '|&' to use '2>&1 |' instead, which works on old	2012-07-02 18:37:59 +00:00
CMakeLists.txt	llvm/test/CMakeLists.txt: Add llvm-diff to deps.	2012-07-12 10:15:48 +00:00
lit.cfg	llvm/test/lit.cfg: Retweak for Win32 to fix testing.	2012-07-03 03:59:34 +00:00
lit.site.cfg.in	Remove 'site.exp' building from both CMake and configure+make.	2012-06-28 00:16:51 +00:00
Makefile	Remove 'site.exp' building from both CMake and configure+make.	2012-06-28 00:16:51 +00:00
Makefile.tests
TestRunner.sh