Michael J. Spencer d4b4f2d340 [IR] Make {extract,insert}element accept an index of any integer type. ... Given the following C code llvm currently generates suboptimal code for x86-64: __m128 bss4( const __m128 *ptr, size_t i, size_t j ) { float f = ptr[i][j]; return (__m128) { f, f, f, f }; } ================================================= define <4 x float> @_Z4bss4PKDv4_fmm(<4 x float>* nocapture readonly %ptr, i64 %i, i64 %j) #0 { %a1 = getelementptr inbounds <4 x float>* %ptr, i64 %i %a2 = load <4 x float>* %a1, align 16, !tbaa !1 %a3 = trunc i64 %j to i32 %a4 = extractelement <4 x float> %a2, i32 %a3 %a5 = insertelement <4 x float> undef, float %a4, i32 0 %a6 = insertelement <4 x float> %a5, float %a4, i32 1 %a7 = insertelement <4 x float> %a6, float %a4, i32 2 %a8 = insertelement <4 x float> %a7, float %a4, i32 3 ret <4 x float> %a8 } ================================================= shlq $4, %rsi addq %rdi, %rsi movslq %edx, %rax vbroadcastss (%rsi,%rax,4), %xmm0 retq ================================================= The movslq is uneeded, but is present because of the trunc to i32 and then sext back to i64 that the backend adds for vbroadcastss. We can't remove it because it changes the meaning. The IR that clang generates is already suboptimal. What clang really should emit is: %a4 = extractelement <4 x float> %a2, i64 %j This patch makes that legal. A separate patch will teach clang to do it. Differential Revision: http://reviews.llvm.org/D3519 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207801 91177308-0d34-0410-b5e6-96231b3b80d8		2014-05-01 22:12:39 +00:00
..
Analysis	[LCG] Add the other simple edge insertion API to the call graph. This	2014-05-01 12:18:20 +00:00
AsmParser
Bitcode	[IR] Make {extract,insert}element accept an index of any integer type.	2014-05-01 22:12:39 +00:00
CodeGen	Speculatively roll back r207724-r207726, which are code cleanup changes and	2014-05-01 00:46:58 +00:00
DebugInfo
ExecutionEngine	[ARM64] Try and make the ELF MCJIT *slightly* less broken for ARM64.	2014-04-30 10:15:41 +00:00
IR	[IR] Make {extract,insert}element accept an index of any integer type.	2014-05-01 22:12:39 +00:00
IRReader
LineEditor
Linker
LTO
MC	Fix uninitialized variable introduced in r207739.	2014-05-01 19:55:34 +00:00
Object	ELFObjectWriter: deduplicate suffices in strtab	2014-04-30 16:25:02 +00:00
Option
ProfileData	Fixing a cast-qual warning. getBufferStart() and getBufferEnd() both return a const char *, so casting to non-const was triggering a warning (even though the assignment and usage was always const anyway).	2014-05-01 17:16:24 +00:00
Support
TableGen
Target	Remove HexagonTargetMachine::addPassesForOptimizations; it is not needed any more.	2014-05-01 22:10:59 +00:00
Transforms	Update and sort CMakeLists.	2014-05-01 18:59:11 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile