Jingyue Wu 83c8e732dd Disable indvar widening if arithmetics on the wider type are more expensive ... Summary: Reapply r221772. The old patch breaks the bot because the @indvar_32_bit test was run whether NVPTX was enabled or not. IndVarSimplify should not widen an indvar if arithmetics on the wider indvar are more expensive than those on the narrower indvar. For instance, although NVPTX64 treats i64 as a legal type, an ADD on i64 is twice as expensive as that on i32, because the hardware needs to simulate a 64-bit integer using two 32-bit integers. Split from D6188, and based on D6195 which adds NVPTXTargetTransformInfo. Fixes PR21148. Test Plan: Added @indvar_32_bit that verifies we do not widen an indvar if the arithmetics on the wider type are more expensive. This test is run only when NVPTX is enabled. Reviewers: jholewinski, eliben, meheff, atrick Reviewed By: atrick Subscribers: jholewinski, llvm-commits Differential Revision: http://reviews.llvm.org/D6196 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221799 91177308-0d34-0410-b5e6-96231b3b80d8		2014-11-12 18:09:15 +00:00
..
Analysis	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
AsmParser	X86: Implement the vectorcall calling convention	2014-10-28 01:29:26 +00:00
Bitcode	Return the number of read bytes in MemoryObject::readBytes.	2014-11-12 17:11:16 +00:00
CodeGen	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
DebugInfo	[dwarfdump] Dump DW_AT_ranges values inline in the debug_info dump.	2014-10-23 04:08:34 +00:00
ExecutionEngine	Fixing a -Wcast-qual warning; NFC.	2014-11-12 13:55:27 +00:00
IR	Extend intrinsic name mangling to support arrays, named structs, and function types.	2014-11-12 00:21:51 +00:00
IRReader	Remove unused variable. NFC.	2014-11-06 23:16:57 +00:00
LineEditor
Linker	Revert "IR: MDNode => Value"	2014-11-11 21:30:22 +00:00
LTO	libLTO: Assert if LTOCodeGenerator and LTOModule are from different contexts	2014-11-11 23:13:10 +00:00
MC	Add support for small-model PIC for PowerPC.	2014-11-12 15:16:30 +00:00
Object	Object, support both mach-o archive t.o.c file names	2014-11-12 01:37:45 +00:00
Option
ProfileData	Use ErrorOr for the ::create factory on instrumented and sample profilers.	2014-11-03 00:51:45 +00:00
Support	Return the number of read bytes in MemoryObject::readBytes.	2014-11-12 17:11:16 +00:00
TableGen
Target	Disable indvar widening if arithmetics on the wider type are more expensive	2014-11-12 18:09:15 +00:00
Transforms	Disable indvar widening if arithmetics on the wider type are more expensive	2014-11-12 18:09:15 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile