1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; 3; PR30298: Check if the target doesn't have SSE2, compiler will not crash 4; or generate incorrect code because of vector mul width shrinking optimization. 5; 6; RUN: llc -mtriple=i386-pc-linux-gnu -mattr=+sse < %s | FileCheck %s 7 8@c = external dso_local global ptr, align 8 9 10define void @mul_2xi8(ptr nocapture readonly %a, ptr nocapture readonly %b, i64 %index) nounwind { 11; CHECK-LABEL: mul_2xi8: 12; CHECK: # %bb.0: # %entry 13; CHECK-NEXT: pushl %ebx 14; CHECK-NEXT: pushl %edi 15; CHECK-NEXT: pushl %esi 16; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax 17; CHECK-NEXT: movl {{[0-9]+}}(%esp), %ecx 18; CHECK-NEXT: movl {{[0-9]+}}(%esp), %edx 19; CHECK-NEXT: movl c, %esi 20; CHECK-NEXT: movzbl 1(%edx,%ecx), %edi 21; CHECK-NEXT: movzbl (%edx,%ecx), %edx 22; CHECK-NEXT: movzbl 1(%eax,%ecx), %ebx 23; CHECK-NEXT: imull %edi, %ebx 24; CHECK-NEXT: movzbl (%eax,%ecx), %eax 25; CHECK-NEXT: imull %edx, %eax 26; CHECK-NEXT: movl %ebx, 4(%esi,%ecx,4) 27; CHECK-NEXT: movl %eax, (%esi,%ecx,4) 28; CHECK-NEXT: popl %esi 29; CHECK-NEXT: popl %edi 30; CHECK-NEXT: popl %ebx 31; CHECK-NEXT: retl 32entry: 33 %pre = load ptr, ptr @c 34 %tmp6 = getelementptr inbounds i8, ptr %a, i64 %index 35 %wide.load = load <2 x i8>, ptr %tmp6, align 1 36 %tmp8 = zext <2 x i8> %wide.load to <2 x i32> 37 %tmp10 = getelementptr inbounds i8, ptr %b, i64 %index 38 %wide.load17 = load <2 x i8>, ptr %tmp10, align 1 39 %tmp12 = zext <2 x i8> %wide.load17 to <2 x i32> 40 %tmp13 = mul nuw nsw <2 x i32> %tmp12, %tmp8 41 %tmp14 = getelementptr inbounds i32, ptr %pre, i64 %index 42 store <2 x i32> %tmp13, ptr %tmp14, align 4 43 ret void 44} 45