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https://github.com/c64scene-ar/llvm-6502.git
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33 lines
1.3 KiB
LLVM
33 lines
1.3 KiB
LLVM
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; RUN: llc < %s -march=x86-64 | FileCheck %s
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; LSR's OptimizeMax should eliminate the select (max).
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; CHECK: foo:
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; CHECK-NOT: cmov
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; CHECK: jle
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define void @foo(i64 %n, double* nocapture %p) nounwind {
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entry:
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%cmp6 = icmp slt i64 %n, 0 ; <i1> [#uses=1]
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br i1 %cmp6, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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%tmp = icmp sgt i64 %n, 0 ; <i1> [#uses=1]
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%n.op = add i64 %n, 1 ; <i64> [#uses=1]
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%tmp1 = select i1 %tmp, i64 %n.op, i64 1 ; <i64> [#uses=1]
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%i = phi i64 [ %i.next, %for.body ], [ 0, %for.body.preheader ] ; <i64> [#uses=2]
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%arrayidx = getelementptr double* %p, i64 %i ; <double*> [#uses=2]
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%t4 = load double* %arrayidx ; <double> [#uses=1]
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%mul = fmul double %t4, 2.200000e+00 ; <double> [#uses=1]
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store double %mul, double* %arrayidx
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%i.next = add nsw i64 %i, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %i.next, %tmp1 ; <i1> [#uses=1]
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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