mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-19 03:29:22 +00:00
7ff79c2d9d
make the 'fp return in ST(0)' optimization smart enough to look through token factor nodes. THis allows us to compile testcases like CodeGen/X86/fp-stack-retcopy.ll into: _carg: subl $12, %esp call L_foo$stub fstpl (%esp) fldl (%esp) addl $12, %esp ret instead of: _carg: subl $28, %esp call L_foo$stub fstpl 16(%esp) movsd 16(%esp), %xmm0 movsd %xmm0, 8(%esp) fldl 8(%esp) addl $28, %esp ret Still not optimal, but much better and this is a trivial patch. Fixing the rest requires invasive surgery that is is not llvm 2.2 material. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46054 91177308-0d34-0410-b5e6-96231b3b80d8
13 lines
352 B
LLVM
13 lines
352 B
LLVM
; This should not copy the result of foo into an xmm register.
|
|
; RUN: llvm-as < %s | llc -march=x86 -mcpu=yonah -mtriple=i686-apple-darwin9 | not grep xmm
|
|
; rdar://5689903
|
|
|
|
declare double @foo()
|
|
|
|
define double @carg({ double, double }* byval %z) nounwind {
|
|
entry:
|
|
%tmp5 = tail call double @foo() nounwind ; <double> [#uses=1]
|
|
ret double %tmp5
|
|
}
|
|
|