25 lines
661 B
LLVM
25 lines
661 B
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
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; CHECK: decq [[X:%rdi|%rcx]]
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; CHECK-NOT: testq [[X]], [[X]]
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define i64 @fact2(i64 %x) {
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entry:
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br label %while.body
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while.body:
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%result.06 = phi i64 [ %mul, %while.body ], [ 1, %entry ]
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%x.addr.05 = phi i64 [ %dec, %while.body ], [ %x, %entry ]
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%mul = mul nsw i64 %result.06, %x.addr.05
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%dec = add nsw i64 %x.addr.05, -1
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%cmp = icmp sgt i64 %dec, 0
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br i1 %cmp, label %while.body, label %while.end.loopexit
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while.end.loopexit:
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%mul.lcssa = phi i64 [ %mul, %while.body ]
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br label %while.end
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while.end:
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%result.0.lcssa = phi i64 [ %mul.lcssa, %while.end.loopexit ]
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ret i64 %result.0.lcssa
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}
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