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
..
CMakeLists.txt	split and/or/xor out into one overly-large (2000LOC) file. However, I think	2010-01-05 07:50:36 +00:00
InstCombine.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
InstCombineAddSub.cpp	Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,	2010-03-02 01:11:08 +00:00
InstCombineAndOrXor.cpp	Re-apply the infamous r108614, with a fix pointed out by Dirk Steinke.	2010-08-02 09:32:13 +00:00
InstCombineCalls.cpp	PR7853: fix a silly mistake introduced in r101899, and add a test to make sure	2010-08-09 20:49:43 +00:00
InstCombineCasts.cpp	optimize bitcasts from large integers to vector into vector	2010-08-28 01:20:38 +00:00
InstCombineCompares.cpp	PR7750: !CExpr->isNullValue() only properly computes whether CExpr is nonnull	2010-07-29 18:03:33 +00:00
InstCombineLoadStoreAlloca.cpp	Re-apply r111568 with a fix for the clang self-host.	2010-08-20 18:24:43 +00:00
InstCombineMulDivRem.cpp	Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,	2010-03-02 01:11:08 +00:00
InstCombinePHI.cpp	cache result of operator*	2010-07-12 14:15:58 +00:00
InstCombineSelect.cpp	Remove the rest of my instcombine changes. Back to the drawing board on this one.	2010-07-16 16:39:00 +00:00
InstCombineShifts.cpp	optimize bitcasts from large integers to vector into vector	2010-08-28 01:20:38 +00:00
InstCombineSimplifyDemanded.cpp	use ArgOperand API	2010-06-28 16:45:00 +00:00
InstCombineVectorOps.cpp	Temporarily revert r110987 as it's causing some miscompares in	2010-08-17 22:55:27 +00:00
InstCombineWorklist.h	I got tired of VISIBILITY_HIDDEN colliding with the gcc enum. Rename it	2010-05-11 20:16:09 +00:00
InstructionCombining.cpp	Fix batch of converting RegisterPass<> to INTIALIZE_PASS().	2010-07-21 22:09:45 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00