| /* Test division by const int generates only one shift. */ |
| /* { dg-do run } */ |
| /* { dg-options "-O2 -fdump-rtl-combine-all" } */ |
| /* { dg-options "-O2 -fdump-rtl-combine-all -mtune=cortex-a53" { target aarch64*-*-* } } */ |
| /* { dg-require-effective-target int32plus } */ |
| |
| extern void abort (void); |
| |
| #define NOINLINE __attribute__((noinline)) |
| |
| static NOINLINE int |
| f1 (int n) |
| { |
| return n / 33; |
| } |
| |
| static NOINLINE int |
| f2 (int n) |
| { |
| return n / 77; |
| } |
| |
| int |
| main () |
| { |
| int a = 0xaaaaaaaa; |
| int b = 0x55555555; |
| int c; |
| c = f1 (a); |
| if (c != 0xfd6a052c) |
| abort (); |
| c = f1 (b); |
| if (c != 0x295FAD4) |
| abort (); |
| c = f2 (a); |
| if (c != 0xfee44b5c) |
| abort (); |
| c = f2 (b); |
| if (c != 0x11bb4a4) |
| abort (); |
| return 0; |
| } |
| |
| /* Following replacement pattern of intger division by constant, GCC is expected |
| to generate MULT and (x)SHIFTRT. This test checks that considering division |
| by const 33, gcc generates a single ASHIFTRT by 35, instead of two - LSHIFTRT |
| by 32 and ASHIFTRT by 3. */ |
| |
| /* { dg-final { scan-rtl-dump "\\(set \\(subreg:DI \\(reg:SI" "combine" { target aarch64*-*-* } } } */ |
| /* { dg-final { scan-rtl-dump "\\(ashiftrt:DI \\(reg:DI" "combine" { target aarch64*-*-* } } } */ |
| /* { dg-final { scan-rtl-dump "\\(const_int 35 " "combine" { target aarch64*-*-* } } } */ |
| |
| /* Similarly, considering division by const 77, gcc generates a single ASHIFTRT |
| by 36, instead of two - LSHIFTRT by 32 and ASHIFTRT by 4. */ |
| |
| /* { dg-final { scan-rtl-dump "\\(const_int 36 " "combine" { target aarch64*-*-* } } } */ |
| |