diff options
| -rw-r--r-- | lib/Target/Sparc/README.txt | 29 | ||||
| -rw-r--r-- | lib/Target/SparcV8/README.txt | 29 |
2 files changed, 58 insertions, 0 deletions
diff --git a/lib/Target/Sparc/README.txt b/lib/Target/Sparc/README.txt index b08a752a61..93e2dd82b5 100644 --- a/lib/Target/Sparc/README.txt +++ b/lib/Target/Sparc/README.txt @@ -7,4 +7,33 @@ To-do * We can fold small constant offsets into the %hi/%lo references to constant pool addresses as well. * When in V9 mode, register allocate %icc[0-3]. +* Emit the 'Branch on Integer Register with Prediction' instructions. It's + not clear how to write a pattern for this though: + +float %t1(int %a, int* %p) { + %C = seteq int %a, 0 + br bool %C, label %T, label %F +T: + store int 123, int* %p + br label %F +F: + ret float undef +} + +codegens to this: + +t1: + save -96, %o6, %o6 +1) subcc %i0, 0, %l0 +1) bne .LBBt1_2 ! F + nop +.LBBt1_1: ! T + or %g0, 123, %l0 + st %l0, [%i1] +.LBBt1_2: ! F + restore %g0, %g0, %g0 + retl + nop + +1) should be replaced with a brz in V9 mode. diff --git a/lib/Target/SparcV8/README.txt b/lib/Target/SparcV8/README.txt index b08a752a61..93e2dd82b5 100644 --- a/lib/Target/SparcV8/README.txt +++ b/lib/Target/SparcV8/README.txt @@ -7,4 +7,33 @@ To-do * We can fold small constant offsets into the %hi/%lo references to constant pool addresses as well. * When in V9 mode, register allocate %icc[0-3]. +* Emit the 'Branch on Integer Register with Prediction' instructions. It's + not clear how to write a pattern for this though: + +float %t1(int %a, int* %p) { + %C = seteq int %a, 0 + br bool %C, label %T, label %F +T: + store int 123, int* %p + br label %F +F: + ret float undef +} + +codegens to this: + +t1: + save -96, %o6, %o6 +1) subcc %i0, 0, %l0 +1) bne .LBBt1_2 ! F + nop +.LBBt1_1: ! T + or %g0, 123, %l0 + st %l0, [%i1] +.LBBt1_2: ! F + restore %g0, %g0, %g0 + retl + nop + +1) should be replaced with a brz in V9 mode. |