[llvm-commits] [PATCH 07/11] (patch) Mips specific inline asm: constraint 'N'

[Eric Christopher]

On Apr 12, 2012, at 1:51 PM, Jack Carter <jcarter at mips.com> wrote:

> A constant in the range of -65535 to -1 inclusive.
> 
> Example:
> 
>  int i_input = 7; int i_result = 0;
> 
>  // Good: i_val falls in the correct range
>  int i_val = -3;
>  __asm__ __volatile__(
>    "addi %0,%1,%2" : "=r" (i_result) : "r" (i_input), "N" (i_val));
> 
>  // Bad: llc should produce an error
>  int i_val = 3;
>  __asm__ __volatile__(
>    "addi %0,%1,%2" : "=r" (i_result) : "r" (i_input), "N" (i_val));
> ---
> lib/Target/Mips/MipsISelLowering.cpp         |   11 +++++++++++
> test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll |   15 +++++++++++++++
> test/CodeGen/Mips/inlineasm_constraint.ll    |    6 ++++++
> 3 files changed, 32 insertions(+), 0 deletions(-)
> create mode 100644 test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll
> 
> <Constraint_N.patch>_______________________________________________
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This is fine.

-eric