141 lines
4.2 KiB
LLVM
141 lines
4.2 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -tail-dup-placement=0 | FileCheck %s
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; Test memcpy, memmove, and memset intrinsics.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1)
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declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1)
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declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i1)
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; Test that return values are optimized.
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; CHECK-LABEL: copy_yes:
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; CHECK: call $push0=, memcpy, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i8* @copy_yes(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i1 false)
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ret i8* %dst
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}
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; CHECK-LABEL: copy_no:
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; CHECK: call $drop=, memcpy, $0, $1, $2{{$}}
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; CHECK-NEXT: return{{$}}
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define void @copy_no(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i1 false)
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ret void
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}
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; CHECK-LABEL: move_yes:
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; CHECK: call $push0=, memmove, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i8* @move_yes(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i1 false)
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ret i8* %dst
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}
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; CHECK-LABEL: move_no:
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; CHECK: call $drop=, memmove, $0, $1, $2{{$}}
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; CHECK-NEXT: return{{$}}
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define void @move_no(i8* %dst, i8* %src, i32 %len) {
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %dst, i8* %src, i32 %len, i1 false)
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ret void
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}
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; CHECK-LABEL: set_yes:
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; CHECK: call $push0=, memset, $0, $1, $2{{$}}
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; CHECK-NEXT: return $pop0{{$}}
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define i8* @set_yes(i8* %dst, i8 %src, i32 %len) {
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call void @llvm.memset.p0i8.i32(i8* %dst, i8 %src, i32 %len, i1 false)
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ret i8* %dst
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}
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; CHECK-LABEL: set_no:
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; CHECK: call $drop=, memset, $0, $1, $2{{$}}
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; CHECK-NEXT: return{{$}}
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define void @set_no(i8* %dst, i8 %src, i32 %len) {
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call void @llvm.memset.p0i8.i32(i8* %dst, i8 %src, i32 %len, i1 false)
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ret void
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}
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; CHECK-LABEL: frame_index:
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; CHECK: call $drop=, memset, $pop{{[0-9]+}}, $pop{{[0-9]+}}, $pop{{[0-9]+}}{{$}}
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; CHECK: call $push{{[0-9]+}}=, memset, ${{[0-9]+}}, $pop{{[0-9]+}}, $pop{{[0-9]+}}{{$}}
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; CHECK: return{{$}}
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define void @frame_index() {
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entry:
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%a = alloca [2048 x i8], align 16
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%b = alloca [2048 x i8], align 16
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%0 = getelementptr inbounds [2048 x i8], [2048 x i8]* %a, i32 0, i32 0
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%1 = getelementptr inbounds [2048 x i8], [2048 x i8]* %b, i32 0, i32 0
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call void @llvm.memset.p0i8.i32(i8* align 16 %0, i8 256, i32 1024, i1 false)
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call void @llvm.memset.p0i8.i32(i8* align 16 %1, i8 256, i32 1024, i1 false)
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ret void
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}
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; If the result value of memset doesn't get stackified, it should be marked
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; $drop. Note that we use a call to prevent tail dup so that we can test
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; this specific functionality.
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; CHECK-LABEL: drop_result:
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; CHECK: call $drop=, memset, $0, $1, $2
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declare i8* @def()
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declare void @block_tail_dup()
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define i8* @drop_result(i8* %arg, i8 %arg1, i32 %arg2, i32 %arg3, i32 %arg4) {
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bb:
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%tmp = icmp eq i32 %arg3, 0
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br i1 %tmp, label %bb5, label %bb9
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bb5:
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%tmp6 = icmp eq i32 %arg4, 0
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br i1 %tmp6, label %bb7, label %bb8
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bb7:
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call void @llvm.memset.p0i8.i32(i8* %arg, i8 %arg1, i32 %arg2, i1 false)
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br label %bb11
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bb8:
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br label %bb11
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bb9:
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%tmp10 = call i8* @def()
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br label %bb11
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bb11:
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%tmp12 = phi i8* [ %arg, %bb7 ], [ %arg, %bb8 ], [ %tmp10, %bb9 ]
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call void @block_tail_dup()
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ret i8* %tmp12
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}
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; This is the same as drop_result, except we let tail dup happen, so the
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; result of the memset *is* stackified.
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; CHECK-LABEL: tail_dup_to_reuse_result:
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; CHECK: call $push{{[0-9]+}}=, memset, $0, $1, $2
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define i8* @tail_dup_to_reuse_result(i8* %arg, i8 %arg1, i32 %arg2, i32 %arg3, i32 %arg4) {
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bb:
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%tmp = icmp eq i32 %arg3, 0
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br i1 %tmp, label %bb5, label %bb9
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bb5:
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%tmp6 = icmp eq i32 %arg4, 0
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br i1 %tmp6, label %bb7, label %bb8
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bb7:
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call void @llvm.memset.p0i8.i32(i8* %arg, i8 %arg1, i32 %arg2, i1 false)
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br label %bb11
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bb8:
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br label %bb11
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bb9:
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%tmp10 = call i8* @def()
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br label %bb11
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bb11:
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%tmp12 = phi i8* [ %arg, %bb7 ], [ %arg, %bb8 ], [ %tmp10, %bb9 ]
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ret i8* %tmp12
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}
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