diff options
| -rw-r--r-- | lib/Target/X86/README.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 7c27428060..0ed1e30f76 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -1049,3 +1049,21 @@ int decode_byte (const decode_t* decode) { //===---------------------------------------------------------------------===// +This: +#include <xmmintrin.h> +unsigned test(float f) { + return _mm_cvtsi128_si32( (__m128i) _mm_set_ss( f )); +} + +Compiles to: +_test: + movss 4(%esp), %xmm0 + movd %xmm0, %eax + ret + +it should compile to a move from the stack slot directly into eax. DAGCombine +has this xform, but it is currently disabled until the alignment fields of +the load/store nodes are trustworthy. + + + |