| /* { dg-do compile } */ |
| /* { dg-options "-O2 -fdump-tree-optimized" } */ |
| |
| #define REGISTER register |
| |
| #if defined __arm__ |
| # define REG1 asm("r4") |
| #elif defined __i386__ |
| # define REG1 asm("ebx") |
| #elif defined __mips__ |
| # define REG1 asm("s0") |
| #elif defined __x86_64__ |
| # define REG1 asm("rbp") |
| #else |
| # undef REGISTER |
| # define REGISTER |
| # define REG1 |
| #endif |
| |
| REGISTER long data_0 REG1; |
| long data_3; |
| |
| long foo(long data, long v) |
| { |
| long i; |
| long t, u; |
| |
| if (data) |
| i = data_0 + data_3; |
| else { |
| v = 2; |
| i = 5; |
| } |
| t = data_0 + data_3; |
| u = i; |
| return v * t * u; |
| } |
| |
| /* We should not eliminate global register variable when it is the RHS of |
| a single assignment. So the number of loads from data_0 has to match |
| that of the number of adds (we hoist data_0 + data_3 above the |
| if (data) and eliminate the useless copy). */ |
| |
| /* { dg-final { scan-tree-dump-times "= data_0;" 1 "optimized" { target { arm*-*-* i?86-*-* mips*-*-* x86_64-*-* } } } } */ |
| /* { dg-final { scan-tree-dump-times " \\+ " 1 "optimized" { target { ! { arm*-*-* i?86-*-* mips*-*-* x86_64-*-* } } } } } */ |
