diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/README.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt index e8c2561d417..c4746d0c756 100644 --- a/llvm/lib/Target/X86/README.txt +++ b/llvm/lib/Target/X86/README.txt @@ -1818,3 +1818,25 @@ LBB1_1: ## bb1 jne LBB1_1 ## bb1 //===---------------------------------------------------------------------===// + +test/CodeGen/X86/2009-03-07-FPConstSelect.ll compiles to: + +_f: + xorl %eax, %eax + cmpl $0, 4(%esp) + movl $4, %ecx + cmovne %eax, %ecx + flds LCPI1_0(%ecx) + ret + +we should recognize cmov of 0 and a power of two and compile it into a +setcc+shift. This would give us something like: + +_f: + xorl %eax,%eax + cmpl $0, 4(%esp) + seteq %al + flds LCPI1_0(%ecx, %eax,4) + ret + +//===---------------------------------------------------------------------===// |
