Chris Lattner 3dd08734c1 optimize bitcasts from large integers to vector into vector ... element insertion from the pieces that feed into the vector. This handles a pattern that occurs frequently due to code generated for the x86-64 abi. We now compile something like this: struct S { float A, B, C, D; }; struct S g; struct S bar() { struct S A = g; ++A.A; ++A.C; return A; } into all nice vector operations: _bar: ## @bar ## BB#0: ## %entry movq _g@GOTPCREL(%rip), %rax movss LCPI1_0(%rip), %xmm1 movss (%rax), %xmm0 addss %xmm1, %xmm0 pshufd $16, %xmm0, %xmm0 movss 4(%rax), %xmm2 movss 12(%rax), %xmm3 pshufd $16, %xmm2, %xmm2 unpcklps %xmm2, %xmm0 addss 8(%rax), %xmm1 pshufd $16, %xmm1, %xmm1 pshufd $16, %xmm3, %xmm2 unpcklps %xmm2, %xmm1 ret instead of icky integer operations: _bar: ## @bar movq _g@GOTPCREL(%rip), %rax movss LCPI1_0(%rip), %xmm1 movss (%rax), %xmm0 addss %xmm1, %xmm0 movd %xmm0, %ecx movl 4(%rax), %edx movl 12(%rax), %esi shlq $32, %rdx addq %rcx, %rdx movd %rdx, %xmm0 addss 8(%rax), %xmm1 movd %xmm1, %eax shlq $32, %rsi addq %rax, %rsi movd %rsi, %xmm1 ret This resolves rdar://8360454 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112343 91177308-0d34-0410-b5e6-96231b3b80d8		2010-08-28 01:20:38 +00:00
..
Analysis	Fix an index calculation thinko.	2010-08-28 00:39:27 +00:00
Archive
AsmParser	Add a comment explaining why this code doesn't just call	2010-08-24 14:35:45 +00:00
Bitcode	Add a FIXME comment.	2010-08-25 20:23:38 +00:00
CodeGen	Completely disable tail calls when fast-isel is enabled, as fast-isel	2010-08-28 00:51:03 +00:00
CompilerDriver	Add a TODO.	2010-08-23 19:24:12 +00:00
ExecutionEngine	remove some dead code.	2010-08-23 03:12:06 +00:00
Linker	Reapply r112091 and r111922, support for metadata linking, with a	2010-08-26 15:41:53 +00:00
MC	MCELF: Port EmitInstruction changes from MachO streamer. Patch by Roman Divacky.	2010-08-27 10:40:51 +00:00
Support	StringRef::compare_numeric also differed from StringRef::compare for characters > 127.	2010-08-26 15:25:35 +00:00
System
Target	We don't need to custom-select VLDMQ and VSTMQ anymore.	2010-08-28 00:20:11 +00:00
Transforms	optimize bitcasts from large integers to vector into vector	2010-08-28 01:20:38 +00:00
VMCore	Add alignment arguments to all the NEON load/store intrinsics.	2010-08-27 17:13:24 +00:00
Makefile