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https://github.com/c64scene-ar/llvm-6502.git
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a8225083ba
strides for now, because it doesn't handle them correctly. This fixes a miscompile of SingleSource/Benchmarks/Misc-C++/ray. This problem was usually hidden because indvars transforms such induction variables into negations of canonical induction variables. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85118 91177308-0d34-0410-b5e6-96231b3b80d8
26 lines
1004 B
LLVM
26 lines
1004 B
LLVM
; RUN: llc < %s -march=x86-64 | grep cvtsi2sd
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; LSR previously eliminated the sitofp by introducing an induction
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; variable which stepped by a bogus ((double)UINT32_C(-1)). It's theoretically
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; possible to eliminate the sitofp using a proper -1.0 step though; this
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; test should be changed if that is done.
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define void @foo(i32 %N) nounwind {
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entry:
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%0 = icmp slt i32 %N, 0 ; <i1> [#uses=1]
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br i1 %0, label %bb, label %return
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bb: ; preds = %bb, %entry
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%i.03 = phi i32 [ 0, %entry ], [ %2, %bb ] ; <i32> [#uses=2]
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%1 = sitofp i32 %i.03 to double ; <double> [#uses=1]
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tail call void @bar(double %1) nounwind
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%2 = add nsw i32 %i.03, -1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %2, %N ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb, %entry
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ret void
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}
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declare void @bar(double)
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