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Diffstat (limited to 'lib/Target/ARM/README-Thumb.txt')
| -rw-r--r-- | lib/Target/ARM/README-Thumb.txt | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/lib/Target/ARM/README-Thumb.txt b/lib/Target/ARM/README-Thumb.txt index a961a576f40d..e7770b2292e1 100644 --- a/lib/Target/ARM/README-Thumb.txt +++ b/lib/Target/ARM/README-Thumb.txt @@ -196,14 +196,6 @@ This is especially bad when dynamic alloca is used. The all fixed size stack objects are referenced off the frame pointer with negative offsets. See oggenc for an example. -//===---------------------------------------------------------------------===// - -We are reserving R3 as a scratch register under thumb mode. So if it is live in -to the function, we save / restore R3 to / from R12. Until register scavenging -is done, we should save R3 to a high callee saved reg at emitPrologue time -(when hasFP is true or stack size is large) and restore R3 from that register -instead. This allows us to at least get rid of the save to r12 everytime it is -used. //===---------------------------------------------------------------------===// |