llvm-6502/test/CodeGen/ARM/fast-isel-static.ll
Jakob Stoklund Olesen 5e5ed44577 Be less aggressive about hinting in RAFast.
In particular, don't spill dirty registers only to satisfy a hint. It is
not worth it.

The attached test case provides an example where the fast allocator
would spill a register when other registers are available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132900 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-13 03:26:46 +00:00

31 lines
1.0 KiB
LLVM

; RUN: llc < %s -mtriple=thumbv7-apple-darwin -O0 -relocation-model=static -arm-long-calls | FileCheck -check-prefix=LONG %s
; RUN: llc < %s -mtriple=thumbv7-apple-darwin -O0 -relocation-model=static | FileCheck -check-prefix=NORM %s
define void @myadd(float* %sum, float* %addend) nounwind {
entry:
%sum.addr = alloca float*, align 4
%addend.addr = alloca float*, align 4
store float* %sum, float** %sum.addr, align 4
store float* %addend, float** %addend.addr, align 4
%tmp = load float** %sum.addr, align 4
%tmp1 = load float* %tmp
%tmp2 = load float** %addend.addr, align 4
%tmp3 = load float* %tmp2
%add = fadd float %tmp1, %tmp3
%tmp4 = load float** %sum.addr, align 4
store float %add, float* %tmp4
ret void
}
define i32 @main(i32 %argc, i8** %argv) nounwind {
entry:
%ztot = alloca float, align 4
%z = alloca float, align 4
store float 0.000000e+00, float* %ztot, align 4
store float 1.000000e+00, float* %z, align 4
; CHECK-LONG: blx r
; CHECK-NORM: bl _myadd
call void @myadd(float* %ztot, float* %z)
ret i32 0
}