Chris Lattner e5a1426174 optimize bitcast(trunc(bitcast(x))) where the result is a float and 'x' ... is a vector to be a vector element extraction. This allows clang to compile: struct S { float A, B, C, D; }; float foo(struct S A) { return A.A + A.B+A.C+A.D; } into: _foo: ## @foo ## BB#0: ## %entry movd %xmm0, %rax shrq $32, %rax movd %eax, %xmm2 addss %xmm0, %xmm2 movapd %xmm1, %xmm3 addss %xmm2, %xmm3 movd %xmm1, %rax shrq $32, %rax movd %eax, %xmm0 addss %xmm3, %xmm0 ret instead of: _foo: ## @foo ## BB#0: ## %entry movd %xmm0, %rax movd %eax, %xmm0 shrq $32, %rax movd %eax, %xmm2 addss %xmm0, %xmm2 movd %xmm1, %rax movd %eax, %xmm1 addss %xmm2, %xmm1 shrq $32, %rax movd %eax, %xmm0 addss %xmm1, %xmm0 ret ... eliminating half of the horribleness. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112227 91177308-0d34-0410-b5e6-96231b3b80d8		2010-08-26 21:55:42 +00:00
..
CMakeLists.txt
InstCombine.h	Reapply r110396, with fixes to appease the Linux buildbot gods.	2010-08-06 18:33:48 +00:00
InstCombineAddSub.cpp
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 bitcast(trunc(bitcast(x))) where the result is a float and 'x'	2010-08-26 21:55:42 +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
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
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
InstructionCombining.cpp	Fix batch of converting RegisterPass<> to INTIALIZE_PASS().	2010-07-21 22:09:45 +00:00
Makefile