; RUN: llc -mtriple=i686-windows -mattr=+sse2 < %s | FileCheck %s
target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
target triple = "i686-pc-windows-msvc"
; There is a conflict between lowering the X86 memory intrinsics and the "base"
; register used to address stack locals. See X86RegisterInfo::hasBaseRegister
; for when this is necessary. Typically, we chose ESI for the base register,
; which all of the X86 string instructions use.
declare void @escape_vla_and_icmp(ptr, i1 zeroext)
declare void @llvm.memcpy.p0.p0.i32(ptr nocapture, ptr nocapture readonly, i32, i1)
declare void @llvm.memset.p0.i32(ptr nocapture, i8, i32, i1)
define i32 @memcpy_novla_vector(ptr %vp0, ptr %a, ptr %b, i32 %n, i1 zeroext %cond) {
%foo = alloca <4 x i32>, align 16
call void @llvm.memcpy.p0.p0.i32(ptr align 4 %a, ptr align 4 %b, i32 128, i1 false)
br i1 %cond, label %spill_vectors, label %no_vectors
no_vectors:
ret i32 0
spill_vectors:
%vp1 = getelementptr <4 x i32>, ptr %vp0, i32 1
%v0 = load <4 x i32>, ptr %vp0
%v1 = load <4 x i32>, ptr %vp1
%vicmp = icmp slt <4 x i32> %v0, %v1
%icmp = extractelement <4 x i1> %vicmp, i32 0
call void @escape_vla_and_icmp(ptr null, i1 zeroext %icmp)
%r = extractelement <4 x i32> %v0, i32 0
ret i32 %r
}
; CHECK-LABEL: _memcpy_novla_vector:
; CHECK: andl $-16, %esp
; CHECK-DAG: movl $32, %ecx
; CHECK-DAG: movl {{.*}}, %esi
; CHECK-DAG: movl {{.*}}, %edi
; CHECK: rep;movsl
define i32 @memcpy_vla_vector(ptr %vp0, ptr %a, ptr %b, i32 %n, i1 zeroext %cond) {
%foo = alloca <4 x i32>, align 16
call void @llvm.memcpy.p0.p0.i32(ptr align 4 %a, ptr align 4 %b, i32 128, i1 false)
br i1 %cond, label %spill_vectors, label %no_vectors
no_vectors:
ret i32 0
spill_vectors:
%vp1 = getelementptr <4 x i32>, ptr %vp0, i32 1
%v0 = load <4 x i32>, ptr %vp0
%v1 = load <4 x i32>, ptr %vp1
%vicmp = icmp slt <4 x i32> %v0, %v1
%icmp = extractelement <4 x i1> %vicmp, i32 0
%vla = alloca i8, i32 %n
call void @escape_vla_and_icmp(ptr %vla, i1 zeroext %icmp)
%r = extractelement <4 x i32> %v0, i32 0
ret i32 %r
}
; CHECK-LABEL: _memcpy_vla_vector:
; CHECK: andl $-16, %esp
; CHECK: movl %esp, %esi
; CHECK: pushl $128
; CHECK: calll _memcpy
; CHECK: calll __chkstk
; stosd doesn't clobber esi, so we can use it.
define i32 @memset_vla_vector(ptr %vp0, ptr %a, i32 %n, i1 zeroext %cond) {
%foo = alloca <4 x i32>, align 16
call void @llvm.memset.p0.i32(ptr align 4 %a, i8 42, i32 128, i1 false)
br i1 %cond, label %spill_vectors, label %no_vectors
no_vectors:
ret i32 0
spill_vectors:
%vp1 = getelementptr <4 x i32>, ptr %vp0, i32 1
%v0 = load <4 x i32>, ptr %vp0
%v1 = load <4 x i32>, ptr %vp1
%vicmp = icmp slt <4 x i32> %v0, %v1
%icmp = extractelement <4 x i1> %vicmp, i32 0
%vla = alloca i8, i32 %n
call void @escape_vla_and_icmp(ptr %vla, i1 zeroext %icmp)
%r = extractelement <4 x i32> %v0, i32 0
ret i32 %r
}
; CHECK-LABEL: _memset_vla_vector:
; CHECK: andl $-16, %esp
; CHECK: movl %esp, %esi
; CHECK-DAG: movl $707406378, %eax # imm = 0x2A2A2A2A
; CHECK-DAG: movl $32, %ecx
; CHECK-DAG: movl {{.*}}, %edi
; CHECK-NOT: movl {{.*}}, %esi
; CHECK: rep;stosl
; Add a test for memcmp if we ever add a special lowering for it.
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