Don't split loops on Shader Model 4+.
Don't split loops on Shader Model 4+.

TRAC #22516
Signed-off-by: Shannon Woods
Signed-off-by: Geoff Lang
Author: Nicolas Capens

git-svn-id: 2a1ef23f1c4b6a1dbccd5f9514022461535c55c0@1925 736b8ea6-26fd-11df-bfd4-992fa37f6226

themusicgod1/angleproject,xin3liang/platform_external_chromium_org_third_party_angle_dx11,jgcaaprom/android_external_chromium_org_third_party_angle,xin3liang/platform_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,bsergean/angle,MSOpenTech/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,ehsan/angle,jgcaaprom/android_external_chromium_org_third_party_angle,android-ia/platform_external_chromium_org_third_party_angle,nandhanurrevanth/angle,vvuk/angle-old,crezefire/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,crezefire/angle,xuxiandi/angleproject,csa7mdm/angle,MSOpenTech/angle-win8.0,themusicgod1/angleproject,mlfarrell/angle,ghostoy/angle,RepublicMaster/angleproject,stammen/angleproject,MSOpenTech/angle-win8.0,android-ia/platform_external_chromium_org_third_party_angle,stammen/angleproject,mikolalysenko/angle,crezefire/angle,jgcaaprom/android_external_chromium_org_third_party_angle,KalebDark/angleproject,vvuk/angle-old,csa7mdm/angle,xin3liang/platform_external_chromium_org_third_party_angle,larsbergstrom/angle,KalebDark/angleproject,android-ia/platform_external_chromium_org_third_party_angle_dx11,vvuk/angle,pombreda/angleproject,ecoal95/angle,xuxiandi/angleproject,xuxiandi/angleproject,vvuk/angle,MSOpenTech/angle,vvuk/angle,stammen/angleproject,ppy/angle,cantren/angleproject,KTXSoftware/angleproject,KTXSoftware/angleproject,shairai/angleproject,RepublicMaster/angleproject,ghostoy/angle,pombreda/angleproject,KalebDark/angleproject,ghostoy/angle,bsergean/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,nandhanurrevanth/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,ecoal95/angle,cantren/angleproject,MIPS/external-chromium_org-third_party-angle_dx11,ehsan/angle,mrobinson/rust-angle,mybios/angle,MSOpenTech/angle,cantren/angleproject,themusicgod1/angleproject,pombreda/angleproject,ppy/angle,xin3liang/platform_external_chromium_org_third_party_angle,KalebDark/angleproject,geekboxzone/lollipop_external_chromium_org_third_party_angle,cvsuser-chromium/chromium-third-party_angle_dx11,larsbergstrom/angle,domokit/waterfall,KTXSoftware/angleproject,shairai/angleproject,domokit/waterfall,csa7mdm/angle,MSOpenTech/angle-win8.0,ecoal95/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,vvuk/angle,nandhanurrevanth/angle,ppy/angle,nandhanurrevanth/angle,mrobinson/rust-angle,mrobinson/rust-angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,ecoal95/angle,mrobinson/rust-angle,shairai/angleproject,ppy/angle,bsergean/angle,MIPS/external-chromium_org-third_party-angle,themusicgod1/angleproject,MIPS/external-chromium_org-third_party-angle_dx11,stammen/angleproject,mlfarrell/angle,csa7mdm/angle,jgcaaprom/android_external_chromium_org_third_party_angle,crezefire/angle,mikolalysenko/angle,shairai/angleproject,larsbergstrom/angle,MSOpenTech/angle-win8.0,vvuk/angle-old,ghostoy/angle,xin3liang/platform_external_chromium_org_third_party_angle,pombreda/angleproject,xin3liang/platform_external_chromium_org_third_party_angle_dx11,KTXSoftware/angleproject,mrobinson/rust-angle,RepublicMaster/angleproject,mikolalysenko/angle,vvuk/angle-old,android-ia/platform_external_chromium_org_third_party_angle,cvsuser-chromium/chromium-third-party_angle_dx11,MIPS/external-chromium_org-third_party-angle_dx11,ehsan/angle,ecoal95/angle,android-ia/platform_external_chromium_org_third_party_angle,MSOpenTech/angle,mybios/angle,larsbergstrom/angle,mlfarrell/angle,bsergean/angle,cantren/angleproject,xin3liang/platform_external_chromium_org_third_party_angle_dx11,RepublicMaster/angleproject,MIPS/external-chromium_org-third_party-angle_dx11,mikolalysenko/angle,MIPS/external-chromium_org-third_party-angle,xuxiandi/angleproject,ehsan/angle,cvsuser-chromium/chromium-third-party_angle_dx11,geekboxzone/lollipop_external_chromium_org_third_party_angle,mybios/angle,KTXSoftware/angleproject,MIPS/external-chromium_org-third_party-angle,mybios/angle,cvsuser-chromium/chromium-third-party_angle_dx11,mlfarrell/angle