1 ; RUN: llc -mtriple=i686-windows -mattr=+sse2 < %s | FileCheck %s
3 target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
4 target triple = "i686-pc-windows-msvc"
6 ; There is a conflict between lowering the X86 memory intrinsics and the "base"
7 ; register used to address stack locals. See X86RegisterInfo::hasBaseRegister
8 ; for when this is necessary. Typically, we chose ESI for the base register,
9 ; which all of the X86 string instructions use.
11 declare void @escape_vla_and_icmp(ptr, i1 zeroext)
12 declare void @llvm.memcpy.p0.p0.i32(ptr nocapture, ptr nocapture readonly, i32, i1)
13 declare void @llvm.memset.p0.i32(ptr nocapture, i8, i32, i1)
15 define i32 @memcpy_novla_vector(ptr %vp0, ptr %a, ptr %b, i32 %n, i1 zeroext %cond) {
16 %foo = alloca <4 x i32>, align 16
17 call void @llvm.memcpy.p0.p0.i32(ptr align 4 %a, ptr align 4 %b, i32 128, i1 false)
18 br i1 %cond, label %spill_vectors, label %no_vectors
24 %vp1 = getelementptr <4 x i32>, ptr %vp0, i32 1
25 %v0 = load <4 x i32>, ptr %vp0
26 %v1 = load <4 x i32>, ptr %vp1
27 %vicmp = icmp slt <4 x i32> %v0, %v1
28 %icmp = extractelement <4 x i1> %vicmp, i32 0
29 call void @escape_vla_and_icmp(ptr null, i1 zeroext %icmp)
30 %r = extractelement <4 x i32> %v0, i32 0
34 ; CHECK-LABEL: _memcpy_novla_vector:
35 ; CHECK: andl $-16, %esp
36 ; CHECK-DAG: movl $32, %ecx
37 ; CHECK-DAG: movl {{.*}}, %esi
38 ; CHECK-DAG: movl {{.*}}, %edi
41 define i32 @memcpy_vla_vector(ptr %vp0, ptr %a, ptr %b, i32 %n, i1 zeroext %cond) {
42 %foo = alloca <4 x i32>, align 16
43 call void @llvm.memcpy.p0.p0.i32(ptr align 4 %a, ptr align 4 %b, i32 128, i1 false)
44 br i1 %cond, label %spill_vectors, label %no_vectors
50 %vp1 = getelementptr <4 x i32>, ptr %vp0, i32 1
51 %v0 = load <4 x i32>, ptr %vp0
52 %v1 = load <4 x i32>, ptr %vp1
53 %vicmp = icmp slt <4 x i32> %v0, %v1
54 %icmp = extractelement <4 x i1> %vicmp, i32 0
55 %vla = alloca i8, i32 %n
56 call void @escape_vla_and_icmp(ptr %vla, i1 zeroext %icmp)
57 %r = extractelement <4 x i32> %v0, i32 0
61 ; CHECK-LABEL: _memcpy_vla_vector:
62 ; CHECK: andl $-16, %esp
63 ; CHECK: movl %esp, %esi
65 ; CHECK: calll _memcpy
66 ; CHECK: calll __chkstk
68 ; stosd doesn't clobber esi, so we can use it.
70 define i32 @memset_vla_vector(ptr %vp0, ptr %a, i32 %n, i1 zeroext %cond) {
71 %foo = alloca <4 x i32>, align 16
72 call void @llvm.memset.p0.i32(ptr align 4 %a, i8 42, i32 128, i1 false)
73 br i1 %cond, label %spill_vectors, label %no_vectors
79 %vp1 = getelementptr <4 x i32>, ptr %vp0, i32 1
80 %v0 = load <4 x i32>, ptr %vp0
81 %v1 = load <4 x i32>, ptr %vp1
82 %vicmp = icmp slt <4 x i32> %v0, %v1
83 %icmp = extractelement <4 x i1> %vicmp, i32 0
84 %vla = alloca i8, i32 %n
85 call void @escape_vla_and_icmp(ptr %vla, i1 zeroext %icmp)
86 %r = extractelement <4 x i32> %v0, i32 0
90 ; CHECK-LABEL: _memset_vla_vector:
91 ; CHECK: andl $-16, %esp
92 ; CHECK: movl %esp, %esi
93 ; CHECK-DAG: movl $707406378, %eax # imm = 0x2A2A2A2A
94 ; CHECK-DAG: movl $32, %ecx
95 ; CHECK-DAG: movl {{.*}}, %edi
96 ; CHECK-NOT: movl {{.*}}, %esi
99 ; Add a test for memcmp if we ever add a special lowering for it.