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view test/CodeGen/X86/atom-bypass-slow-division-64.ll @ 33:e4204d083e25

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LLVM 3.5
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 14:32:10 +0900
parents 95c75e76d11b
children 54457678186b
line wrap: on
line source

; RUN: llc < %s -mcpu=atom -mtriple=i686-linux -march=x86-64 | FileCheck %s

; Additional tests for 64-bit divide bypass

define i64 @Test_get_quotient(i64 %a, i64 %b) nounwind {
; CHECK-LABEL: Test_get_quotient:
; CHECK: movq %rdi, %rax
; CHECK: orq %rsi, %rax
; CHECK-NEXT: testq $-65536, %rax
; CHECK-NEXT: je
; CHECK: idivq
; CHECK: ret
; CHECK: divw
; CHECK: ret
  %result = sdiv i64 %a, %b
  ret i64 %result
}

define i64 @Test_get_remainder(i64 %a, i64 %b) nounwind {
; CHECK-LABEL: Test_get_remainder:
; CHECK: movq %rdi, %rax
; CHECK: orq %rsi, %rax
; CHECK-NEXT: testq $-65536, %rax
; CHECK-NEXT: je
; CHECK: idivq
; CHECK: ret
; CHECK: divw
; CHECK: ret
  %result = srem i64 %a, %b
  ret i64 %result
}

define i64 @Test_get_quotient_and_remainder(i64 %a, i64 %b) nounwind {
; CHECK-LABEL: Test_get_quotient_and_remainder:
; CHECK: movq %rdi, %rax
; CHECK: orq %rsi, %rax
; CHECK-NEXT: testq $-65536, %rax
; CHECK-NEXT: je
; CHECK: idivq
; CHECK: divw
; CHECK: addq
; CHECK: ret
; CHECK-NOT: idivq
; CHECK-NOT: divw
  %resultdiv = sdiv i64 %a, %b
  %resultrem = srem i64 %a, %b
  %result = add i64 %resultdiv, %resultrem
  ret i64 %result
}