1 ; Check that a division is bypassed when appropriate only.
2 ; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=atom < %s | FileCheck -check-prefixes=ATOM,CHECK %s
3 ; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=silvermont < %s | FileCheck -check-prefixes=REST,CHECK %s
4 ; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake < %s | FileCheck -check-prefixes=REST,CHECK %s
6 ; Verify that div32 is bypassed only for Atoms.
7 define i32 @div32(i32 %a, i32 %b) {
10 ; ATOM: orl %{{.*}}, [[REG:%[a-z]+]]
11 ; ATOM: testl $-256, [[REG]]
17 %div = sdiv i32 %a, %b
21 ; Verify that div64 is always bypassed.
22 define i64 @div64(i64 %a, i64 %b) {
25 ; CHECK: orq %{{.*}}, [[REG:%[a-z]+]]
26 ; CHECK: shrq $32, [[REG]]
29 %div = sdiv i64 %a, %b
34 ; Verify that no extra code is generated when optimizing for size.
36 define i64 @div64_optsize(i64 %a, i64 %b) optsize {
37 ; CHECK-LABEL: div64_optsize:
39 %div = sdiv i64 %a, %b
43 define i32 @div32_optsize(i32 %a, i32 %b) optsize {
44 ; CHECK-LABEL: div32_optsize:
46 %div = sdiv i32 %a, %b
50 define i32 @div32_minsize(i32 %a, i32 %b) minsize {
51 ; CHECK-LABEL: div32_minsize:
53 %div = sdiv i32 %a, %b