llvm-6502/test/CodeGen/X86/2014-05-29-factorial.ll

25 lines
661 B
LLVM

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