| Chris Lattner | 71d845c | 2010-02-09 06:24:00 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -march=x86 | FileCheck %s -check-prefix=X32 |
| 2 | ; RUN: llc < %s -march=x86-64 | FileCheck %s -check-prefix=X64 |
| 3 | |
| 4 | ; The immediate can be encoded in a smaller way if the |
| 5 | ; instruction is a sub instead of an add. |
| 6 | |
| 7 | define i32 @test1(i32 inreg %a) nounwind { |
| 8 | %b = add i32 %a, 128 |
| 9 | ret i32 %b |
| 10 | ; X32: subl $-128, %eax |
| 11 | ; X64: subl $-128, |
| 12 | } |
| 13 | define i64 @test2(i64 inreg %a) nounwind { |
| 14 | %b = add i64 %a, 2147483648 |
| 15 | ret i64 %b |
| 16 | ; X32: addl $-2147483648, %eax |
| 17 | ; X64: subq $-2147483648, |
| 18 | } |
| 19 | define i64 @test3(i64 inreg %a) nounwind { |
| 20 | %b = add i64 %a, 128 |
| 21 | ret i64 %b |
| 22 | |
| 23 | ; X32: addl $128, %eax |
| 24 | ; X64: subq $-128, |
| 25 | } |