forked from OSchip/llvm-project
328199ec26
Summary:
1/ Operand folding during complex pattern matching for LEAs has been extended, such that it promotes Scale to
accommodate similar operand appearing in the DAG e.g.
T1 = A + B
T2 = T1 + 10
T3 = T2 + A
For above DAG rooted at T3, X86AddressMode will now look like
Base = B , Index = A , Scale = 2 , Disp = 10
2/ During OptimizeLEAPass down the pipeline factorization is now performed over LEAs so that if there is an opportunity
then complex LEAs (having 3 operands) could be factored out e.g.
leal 1(%rax,%rcx,1), %rdx
leal 1(%rax,%rcx,2), %rcx
will be factored as following
leal 1(%rax,%rcx,1), %rdx
leal (%rdx,%rcx) , %edx
3/ Aggressive operand folding for AM based selection for LEAs is sensitive to loops, thus avoiding creation of any complex LEAs within a loop.
4/ Simplify LEA converts (lea (BASE,1,INDEX,0) --> add (BASE, INDEX) which offers better through put.
PR32755 will be taken care of by this pathc.
Previous patch revisions : r313343 , r314886
Reviewers: lsaba, RKSimon, craig.topper, qcolombet, jmolloy, jbhateja
Reviewed By: lsaba, RKSimon, jbhateja
Subscribers: jmolloy, spatel, igorb, llvm-commits
Differential Revision: https://reviews.llvm.org/D35014
llvm-svn: 319543
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| .. | ||
| AArch64 | ||
| AMDGPU | ||
| ARM | ||
| NVPTX | ||
| X86 | ||
| 2005-08-15-AddRecIV.ll | ||
| 2005-08-17-OutOfLoopVariant.ll | ||
| 2005-09-12-UsesOutOutsideOfLoop.ll | ||
| 2007-04-23-UseIterator.ll | ||
| 2008-08-13-CmpStride.ll | ||
| 2008-09-09-Overflow.ll | ||
| 2009-01-13-nonconstant-stride-outside-loop.ll | ||
| 2009-04-28-no-reduce-mul.ll | ||
| 2011-07-19-CritEdgeBreakCrash.ll | ||
| 2011-10-03-CritEdgeMerge.ll | ||
| 2011-10-06-ReusePhi.ll | ||
| 2011-10-13-SCEVChain.ll | ||
| 2011-10-14-IntPtr.ll | ||
| 2011-12-19-PostincQuadratic.ll | ||
| 2012-01-02-nopreheader.ll | ||
| 2012-01-16-nopreheader.ll | ||
| 2012-03-15-nopreheader.ll | ||
| 2012-03-26-constexpr.ll | ||
| 2012-07-13-ExpandUDiv.ll | ||
| 2012-07-18-LimitReassociate.ll | ||
| 2013-01-05-IndBr.ll | ||
| 2013-01-14-ReuseCast.ll | ||
| addrec-gep-address-space.ll | ||
| addrec-gep.ll | ||
| address-space-loop.ll | ||
| count-to-zero.ll | ||
| dead-phi.ll | ||
| different-type-ivs.ll | ||
| dominate-assert.ll | ||
| dont-hoist-simple-loop-constants.ll | ||
| dont_insert_redundant_ops.ll | ||
| dont_reduce_bytes.ll | ||
| dont_reverse.ll | ||
| ephemeral.ll | ||
| exit_compare_live_range.ll | ||
| funclet.ll | ||
| hoist-parent-preheader.ll | ||
| illegal-addr-modes.ll | ||
| invariant_value_first.ll | ||
| invariant_value_first_arg.ll | ||
| ivchain.ll | ||
| negative-scale.ll | ||
| nested-reduce.ll | ||
| nonintegral.ll | ||
| nonlinear-postinc.ll | ||
| ops_after_indvar.ll | ||
| phi_node_update_multiple_preds.ll | ||
| post-inc-icmpzero.ll | ||
| post-inc-optsize.ll | ||
| pr2537.ll | ||
| pr2570.ll | ||
| pr3086.ll | ||
| pr3399.ll | ||
| pr3571.ll | ||
| pr12018.ll | ||
| pr12048.ll | ||
| pr12691.ll | ||
| pr18165.ll | ||
| pr25541.ll | ||
| pr27056.ll | ||
| pr31627.ll | ||
| preserve-gep-loop-variant.ll | ||
| related_indvars.ll | ||
| remove_indvar.ll | ||
| scaling_factor_cost_crash.ll | ||
| scev-insertpt-bug.ll | ||
| sext-ind-var.ll | ||
| share_code_in_preheader.ll | ||
| share_ivs.ll | ||
| shl.ll | ||
| uglygep-address-space.ll | ||
| uglygep.ll | ||
| use_postinc_value_outside_loop.ll | ||
| var_stride_used_by_compare.ll | ||
| variable_stride.ll | ||