mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 19:29:22 +00:00
8f90b6eb2f
v1024 = EDI // not killed
=
= EDI
One possible solution is for the coalescer to examine the sub-register live intervals in the same manner as the physical register. Another possibility is to examine defs and uses (when needed) of sub-registers. Both solutions are too expensive. For now, look for "short virtual intervals" and scan instructions to look for conflict instead.
This is a small win on x86-64. e.g. It shaves 403.gcc by ~80 instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61847 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
1.1 KiB
LLVM
25 lines
1.1 KiB
LLVM
; RUN: llvm-as < %s | llc -mtriple=x86_64-apple-darwin9 -mattr=+sse2 | not grep movl
|
|
|
|
%struct.dpoint = type { double, double }
|
|
|
|
define %struct.dpoint @midpoint(i64 %p1.0, i64 %p2.0) nounwind readnone {
|
|
entry:
|
|
%0 = trunc i64 %p1.0 to i32 ; <i32> [#uses=1]
|
|
%1 = sitofp i32 %0 to double ; <double> [#uses=1]
|
|
%2 = trunc i64 %p2.0 to i32 ; <i32> [#uses=1]
|
|
%3 = sitofp i32 %2 to double ; <double> [#uses=1]
|
|
%4 = add double %1, %3 ; <double> [#uses=1]
|
|
%5 = mul double %4, 5.000000e-01 ; <double> [#uses=1]
|
|
%6 = lshr i64 %p1.0, 32 ; <i64> [#uses=1]
|
|
%7 = trunc i64 %6 to i32 ; <i32> [#uses=1]
|
|
%8 = sitofp i32 %7 to double ; <double> [#uses=1]
|
|
%9 = lshr i64 %p2.0, 32 ; <i64> [#uses=1]
|
|
%10 = trunc i64 %9 to i32 ; <i32> [#uses=1]
|
|
%11 = sitofp i32 %10 to double ; <double> [#uses=1]
|
|
%12 = add double %8, %11 ; <double> [#uses=1]
|
|
%13 = mul double %12, 5.000000e-01 ; <double> [#uses=1]
|
|
%mrv3 = insertvalue %struct.dpoint undef, double %5, 0 ; <%struct.dpoint> [#uses=1]
|
|
%mrv4 = insertvalue %struct.dpoint %mrv3, double %13, 1 ; <%struct.dpoint> [#uses=1]
|
|
ret %struct.dpoint %mrv4
|
|
}
|