1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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.
6 ; RUN: llc -mtriple=i386-pc-linux-gnu -mattr=+sse < %s | FileCheck %s
8 @c = external dso_local global ptr, align 8
10 define 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
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