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https://github.com/RPCS3/llvm-mirror.git
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7f9bd29a16
Legalization tends to create anyext(trunc) patterns. This should always be combined - into either a single trunc, a single ext, or nothing if the types match exactly. But if we happen to combine the trunc first, we may pull the trunc away from the anyext or make it implicit (e.g. the truncate(extract) -> extract(bitcast) fold). To prevent this, we can avoid doing the fold, similarly to how we already handle fpround(fpextend). Differential Revision: https://reviews.llvm.org/D23893 llvm-svn: 280386
100 lines
3.3 KiB
LLVM
100 lines
3.3 KiB
LLVM
; RUN: llc -mtriple=i686-windows -mattr=+sse2 < %s | FileCheck %s
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target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
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target triple = "i686-pc-windows-msvc"
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; There is a conflict between lowering the X86 memory intrinsics and the "base"
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; register used to address stack locals. See X86RegisterInfo::hasBaseRegister
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; for when this is necessary. Typically, we chose ESI for the base register,
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; which all of the X86 string instructions use.
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declare void @escape_vla_and_icmp(i8*, i1 zeroext)
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1)
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define i32 @memcpy_novla_vector(<4 x i32>* %vp0, i8* %a, i8* %b, i32 %n, i1 zeroext %cond) {
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%foo = alloca <4 x i32>, align 16
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %b, i32 128, i32 4, i1 false)
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br i1 %cond, label %spill_vectors, label %no_vectors
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no_vectors:
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ret i32 0
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spill_vectors:
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%vp1 = getelementptr <4 x i32>, <4 x i32>* %vp0, i32 1
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%v0 = load <4 x i32>, <4 x i32>* %vp0
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%v1 = load <4 x i32>, <4 x i32>* %vp1
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%vicmp = icmp slt <4 x i32> %v0, %v1
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%icmp = extractelement <4 x i1> %vicmp, i32 0
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call void @escape_vla_and_icmp(i8* null, i1 zeroext %icmp)
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%r = extractelement <4 x i32> %v0, i32 0
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ret i32 %r
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}
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; CHECK-LABEL: _memcpy_novla_vector:
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; CHECK: andl $-16, %esp
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; CHECK-DAG: movl $32, %ecx
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; CHECK-DAG: movl {{.*}}, %esi
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; CHECK-DAG: movl {{.*}}, %edi
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; CHECK: rep;movsl
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define i32 @memcpy_vla_vector(<4 x i32>* %vp0, i8* %a, i8* %b, i32 %n, i1 zeroext %cond) {
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%foo = alloca <4 x i32>, align 16
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %b, i32 128, i32 4, i1 false)
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br i1 %cond, label %spill_vectors, label %no_vectors
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no_vectors:
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ret i32 0
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spill_vectors:
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%vp1 = getelementptr <4 x i32>, <4 x i32>* %vp0, i32 1
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%v0 = load <4 x i32>, <4 x i32>* %vp0
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%v1 = load <4 x i32>, <4 x i32>* %vp1
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%vicmp = icmp slt <4 x i32> %v0, %v1
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%icmp = extractelement <4 x i1> %vicmp, i32 0
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%vla = alloca i8, i32 %n
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call void @escape_vla_and_icmp(i8* %vla, i1 zeroext %icmp)
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%r = extractelement <4 x i32> %v0, i32 0
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ret i32 %r
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}
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; CHECK-LABEL: _memcpy_vla_vector:
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; CHECK: andl $-16, %esp
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; CHECK: movl %esp, %esi
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; CHECK: pushl $128
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; CHECK: calll _memcpy
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; CHECK: calll __chkstk
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; stosd doesn't clobber esi, so we can use it.
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define i32 @memset_vla_vector(<4 x i32>* %vp0, i8* %a, i32 %n, i1 zeroext %cond) {
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%foo = alloca <4 x i32>, align 16
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call void @llvm.memset.p0i8.i32(i8* %a, i8 42, i32 128, i32 4, i1 false)
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br i1 %cond, label %spill_vectors, label %no_vectors
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no_vectors:
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ret i32 0
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spill_vectors:
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%vp1 = getelementptr <4 x i32>, <4 x i32>* %vp0, i32 1
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%v0 = load <4 x i32>, <4 x i32>* %vp0
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%v1 = load <4 x i32>, <4 x i32>* %vp1
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%vicmp = icmp slt <4 x i32> %v0, %v1
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%icmp = extractelement <4 x i1> %vicmp, i32 0
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%vla = alloca i8, i32 %n
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call void @escape_vla_and_icmp(i8* %vla, i1 zeroext %icmp)
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%r = extractelement <4 x i32> %v0, i32 0
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ret i32 %r
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}
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; CHECK-LABEL: _memset_vla_vector:
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; CHECK: andl $-16, %esp
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; CHECK: movl %esp, %esi
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; CHECK-DAG: movl $707406378, %eax # imm = 0x2A2A2A2A
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; CHECK-DAG: movl $32, %ecx
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; CHECK-DAG: movl {{.*}}, %edi
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; CHECK-NOT: movl {{.*}}, %esi
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; CHECK: rep;stosl
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; Add a test for memcmp if we ever add a special lowering for it.
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