llvm-6502/test/CodeGen/R600/dot4-folding.ll
Vincent Lejeune e67a4afb5d R600: Const/Neg/Abs can be folded to dot4
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183278 91177308-0d34-0410-b5e6-96231b3b80d8
2013-06-04 23:17:15 +00:00

28 lines
850 B
LLVM

;RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
; Exactly one constant vector can be folded into dot4, which means exactly
; 4 MOV instructions
; CHECK: @main
; CHECK: MOV
; CHECK: MOV
; CHECK: MOV
; CHECK: MOV
; CHECK-NOT: MOV
; CHECK-NOT: MOV
; CHECK-NOT: MOV
; CHECK-NOT: MOV
define void @main(float addrspace(1)* %out) {
main_body:
%0 = load <4 x float> addrspace(8)* null
%1 = load <4 x float> addrspace(8)* getelementptr ([1024 x <4 x float>] addrspace(8)* null, i64 0, i32 1)
%2 = call float @llvm.AMDGPU.dp4(<4 x float> %0,<4 x float> %1)
%3 = insertelement <4 x float> undef, float %2, i32 0
call void @llvm.R600.store.swizzle(<4 x float> %3, i32 0, i32 0)
ret void
}
declare float @llvm.AMDGPU.dp4(<4 x float>, <4 x float>) #1
declare void @llvm.R600.store.swizzle(<4 x float>, i32, i32)
attributes #1 = { readnone }