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llvm-mirror/test/CodeGen/X86/avx512-inc-dec.ll
Elena Demikhovsky 2a53c3fac5 AVX-512: dec/inc instructions are slow on KNL
After Alexey Volkov, I'm adding the same property for KNL, that prefers ADD/SUB instead of INC/DEC.
Added a test.

llvm-svn: 212178
2014-07-02 14:11:05 +00:00

14 lines
268 B
LLVM

; RUN: llc < %s -march=x86-64 -mtriple=x86_64-apple-darwin -mcpu=knl | FileCheck %s
;CHECK-LABEL: test
;CHECK-NOT: dec
;CHECK_NOT: enc
;CHECK: ret
define i32 @test(i32 %a, i32 %b) {
%a1 = add i32 %a, -1
%b1 = add i32 %b, 1
%res = mul i32 %a1, %b1
ret i32 %res
}