mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-13 23:18:51 +00:00
953c681473
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239657 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
2.4 KiB
LLVM
58 lines
2.4 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs -mtriple=amdgcn-- -o - %s | FileCheck %s
|
|
|
|
declare float @llvm.fma.f32(float, float, float)
|
|
|
|
; This checks that rematerialization support of the coalescer does not
|
|
; unnecessarily widen the register class. Without those fixes > 20 VGprs
|
|
; are used here
|
|
; Also check that some rematerialization of the 0 constant happened.
|
|
; CHECK-LABEL: foobar
|
|
; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0
|
|
; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0
|
|
; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0
|
|
; CHECK: v_mov_b32_e32 v{{[0-9]+}}, 0
|
|
; It's probably OK if this is slightly higher:
|
|
; CHECK: ; NumVgprs: 9
|
|
define void @foobar(<4 x float> addrspace(1)* %out, <4 x float> addrspace(1)* %in, i32 %flag) {
|
|
entry:
|
|
%cmpflag = icmp eq i32 %flag, 1
|
|
br i1 %cmpflag, label %loop, label %exit
|
|
|
|
loop:
|
|
%c = phi i32 [0, %entry], [%cnext, %loop]
|
|
%v0 = phi float [0.0, %entry], [%fma.0, %loop]
|
|
%v1 = phi float [0.0, %entry], [%fma.1, %loop]
|
|
%v2 = phi float [0.0, %entry], [%fma.2, %loop]
|
|
%v3 = phi float [0.0, %entry], [%fma.3, %loop]
|
|
|
|
; Try to get the 0 constant to get coalesced into a wide register
|
|
%blup = insertelement <4 x float> undef, float %v0, i32 0
|
|
store <4 x float> %blup, <4 x float> addrspace(1)* %out
|
|
|
|
%load = load <4 x float>, <4 x float> addrspace(1)* %in
|
|
%load.0 = extractelement <4 x float> %load, i32 0
|
|
%load.1 = extractelement <4 x float> %load, i32 1
|
|
%load.2 = extractelement <4 x float> %load, i32 2
|
|
%load.3 = extractelement <4 x float> %load, i32 3
|
|
%fma.0 = call float @llvm.fma.f32(float %v0, float %load.0, float %v0)
|
|
%fma.1 = call float @llvm.fma.f32(float %v1, float %load.1, float %v1)
|
|
%fma.2 = call float @llvm.fma.f32(float %v2, float %load.2, float %v2)
|
|
%fma.3 = call float @llvm.fma.f32(float %v3, float %load.3, float %v3)
|
|
|
|
%cnext = add nsw i32 %c, 1
|
|
%cmp = icmp eq i32 %cnext, 42
|
|
br i1 %cmp, label %exit, label %loop
|
|
|
|
exit:
|
|
%ev0 = phi float [0.0, %entry], [%fma.0, %loop]
|
|
%ev1 = phi float [0.0, %entry], [%fma.1, %loop]
|
|
%ev2 = phi float [0.0, %entry], [%fma.2, %loop]
|
|
%ev3 = phi float [0.0, %entry], [%fma.3, %loop]
|
|
%dst.0 = insertelement <4 x float> undef, float %ev0, i32 0
|
|
%dst.1 = insertelement <4 x float> %dst.0, float %ev1, i32 1
|
|
%dst.2 = insertelement <4 x float> %dst.1, float %ev2, i32 2
|
|
%dst.3 = insertelement <4 x float> %dst.2, float %ev3, i32 3
|
|
store <4 x float> %dst.3, <4 x float> addrspace(1)* %out
|
|
ret void
|
|
}
|