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llvm-6502/test/Transforms/IndVarSimplify/gep-with-mul-base.ll

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Use opt -S instead of piping bitcode output through llvm-dis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81257 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08 22:34:10 +00:00
; RUN: opt < %s -indvars -S > %t
Re-implement the main strength-reduction portion of LoopStrengthReduction. This new version is much more aggressive about doing "full" reduction in cases where it reduces register pressure, and also more aggressive about rewriting induction variables to count down (or up) to zero when doing so reduces register pressure. It currently uses fairly simplistic algorithms for finding reuse opportunities, but it introduces a new framework allows it to combine multiple strategies at once to form hybrid solutions, instead of doing all full-reduction or all base+index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94061 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-21 02:09:26 +00:00
; RUN: grep add %t | count 6
; RUN: grep sub %t | count 2
; RUN: grep mul %t | count 6
Fix a thinko in the code that adapted SCEVMulExpr operands for use in expanding SCEVAddExprs with GEPs. The operands of a SCEVMulExpr need to be multiplied together, not added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72250 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-22 07:14:20 +00:00
define void @foo(i64 %n, i64 %m, i64 %o, double* nocapture %p) nounwind {
entry:
%tmp = icmp sgt i64 %n, 0 ; <i1> [#uses=1]
br i1 %tmp, label %bb.nph, label %return
bb.nph: ; preds = %entry
%tmp1 = mul i64 %n, 37 ; <i64> [#uses=1]
%tmp2 = mul i64 %tmp1, %m ; <i64> [#uses=1]
%tmp3 = mul i64 %tmp2, %o ; <i64> [#uses=1]
br label %bb
bb: ; preds = %bb, %bb.nph
%i.01 = phi i64 [ %tmp3, %bb.nph ], [ %tmp13, %bb ] ; <i64> [#uses=3]
%tmp9 = getelementptr double* %p, i64 %i.01 ; <double*> [#uses=1]
%tmp10 = load double* %tmp9, align 8 ; <double> [#uses=1]
%tmp11 = fdiv double %tmp10, 2.100000e+00 ; <double> [#uses=1]
store double %tmp11, double* %tmp9, align 8
%tmp13 = add i64 %i.01, 1 ; <i64> [#uses=2]
%tmp14 = icmp slt i64 %tmp13, %n ; <i1> [#uses=1]
br i1 %tmp14, label %bb, label %return.loopexit
return.loopexit: ; preds = %bb
br label %return
return: ; preds = %return.loopexit, %entry
ret void
}
define void @bar(i64 %n, i64 %m, i64 %o, i64 %q, double* nocapture %p) nounwind {
entry:
%tmp = icmp sgt i64 %n, 0 ; <i1> [#uses=1]
br i1 %tmp, label %bb.nph, label %return
bb.nph: ; preds = %entry
%tmp1 = mul i64 %n, %q ; <i64> [#uses=1]
%tmp2 = mul i64 %tmp1, %m ; <i64> [#uses=1]
%tmp3 = mul i64 %tmp2, %o ; <i64> [#uses=1]
br label %bb
bb: ; preds = %bb, %bb.nph
%i.01 = phi i64 [ %tmp3, %bb.nph ], [ %tmp13, %bb ] ; <i64> [#uses=3]
%tmp9 = getelementptr double* %p, i64 %i.01 ; <double*> [#uses=1]
%tmp10 = load double* %tmp9, align 8 ; <double> [#uses=1]
%tmp11 = fdiv double %tmp10, 2.100000e+00 ; <double> [#uses=1]
store double %tmp11, double* %tmp9, align 8
%tmp13 = add i64 %i.01, 1 ; <i64> [#uses=2]
%tmp14 = icmp slt i64 %tmp13, %n ; <i1> [#uses=1]
br i1 %tmp14, label %bb, label %return.loopexit
return.loopexit: ; preds = %bb
br label %return
return: ; preds = %return.loopexit, %entry
ret void
}
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